Search

Your search keyword '"Ankan Sur"' showing total 8 results
Start Over Author "Ankan Sur"
8 results on '"Ankan Sur"'

1. Simultaneous Evolutionary Fits for Jupiter and Saturn Incorporating Fuzzy Cores

Author

Ankan Sur, Roberto Tejada Arevalo, Yubo Su, and Adam Burrows

Subjects
Planetary structure, Planetary science, Planetary atmospheres, Exoplanet evolution, Astrophysics, QB460-466
Abstract

With the recent realization that there likely are stably stratified regions in the interiors of both Jupiter and Saturn, we construct new nonadiabatic, inhomogeneous evolutionary models with the same microphysics for each that result at the present time in respectable fits for all major bulk observables for both planets. These include the effective temperature, radius, atmospheric heavy-element and helium abundances (including helium rain), and the lower-order gravity moments J _2 and J _4 . The models preserve from birth most of an extended “fuzzy” heavy-element core. Our predicted atmospheric helium mass fraction for Saturn is ∼0.2, close to some measured estimates but in disagreement with some published predictions. To preserve a fuzzy core from birth, the interiors of both planets must start out at lower entropies than would be used for traditional “hot start” adiabatic models, though the initial exterior mantle entropies can range from hot to warm start values. We do not see a helium ocean in Saturn’s interior, and both models have inner envelopes with significant Brunt–Väisälä frequencies; this region for Saturn at the current epoch is more extended, and in it, the Brunt is larger. The total heavy-element mass fraction in Jupiter and in Saturn is determined to be ∼14% and ∼26%, respectively, though there is some play in these determinations.

Published
2025
Full Text
View/download PDF

2. Jupiter Evolutionary Models Incorporating Stably Stratified Regions

Author

Roberto Tejada Arevalo, Ankan Sur, Yubo Su, and Adam Burrows

Subjects
Solar system gas giant planets, Extrasolar gaseous giant planets, Planetary science, Planetary structure, Planetary cores, Planetary interior, Astrophysics, QB460-466
Abstract

We address the issue of which broad set of initial conditions for the planet Jupiter best matches the current presence of a “fuzzy core” of heavy elements, while at the same time comporting with measured parameters such as its effective temperature, atmospheric helium abundance, radius, and atmospheric metallicity. Our focus is on the class of fuzzy cores that can survive convective mixing to the present day and on the unique challenges of an inhomogeneous Jupiter with stably stratified regions now demanded by the Juno gravity data. Hence, using the new code APPLE , we attempt to put a nonadiabatic Jupiter into an evolutionary context. This requires not only a mass density model, the major relevant byproduct of the Juno data, but a thermal model that is subject to interior heat transport, a realistic atmospheric flux boundary, a helium rain algorithm, and the latest equation of state. The result is a good fit to most major thermal, compositional, and structural constraints that still preserve a fuzzy core and that should inform future more detailed models of the current Jupiter in the context of its evolution from birth.

Published
2025
Full Text
View/download PDF

3. Radio Polarization of Millisecond Pulsars with Multipolar Magnetic Fields

Author

Ankan Sur, Yajie Yuan, and Alexander Philippov

Subjects
Millisecond pulsars, Radio astronomy, Magnetic fields, Astrophysics, QB460-466
Abstract

NICER has observed a few millisecond pulsars where the geometry of the X-ray-emitting hotspots on the neutron star have been analyzed in order to constrain the mass and radius from X-ray light-curve modeling. One example, PSR J0030 + 0451, has been shown to possibly have significant multipolar magnetic fields at the stellar surface. Using force-free simulations of the magnetosphere structure, it has been shown that the radio, X-ray, and γ -ray light curves can be modeled simultaneously with an appropriate field configuration. An even more stringent test is to compare predictions of the force-free magnetosphere model with observations of radio polarization. This paper attempts to reproduce the radio polarization of PSR J0030 + 0451 using a force-free magnetospheric solution. As a result of our modeling, we can reproduce certain features of the polarization well.

Published
2024
Full Text
View/download PDF

4. APPLE: An Evolution Code for Modeling Giant Planets

Author

Ankan Sur, Yubo Su, Roberto Tejada Arevalo, Yi-Xian Chen, and Adam Burrows

Subjects
Planetary science, Exoplanet evolution, Exoplanet structure, Planetary structure, Astrophysics, QB460-466
Abstract

We introduce APPLE , a novel planetary evolution code designed specifically for the study of giant exoplanet and Jovian planet evolution in the era of Galileo, Juno, and Cassini. With APPLE , state-of-the-art equations of state for hydrogen, helium, ice, and rock are integrated with advanced features to treat ice/rock cores and metals in the gaseous envelope; models for helium rain and hydrogen/helium immiscibility; detailed atmosphere boundary tables that also provide self-consistent albedos and spectra; and options to address envelope metal gradients and stably stratified regions. Our hope is that these purpose-built features of APPLE will help catalyze the development of the next generation of giant exoplanet and Jovian planet evolutionary models.

Published
2024
Full Text
View/download PDF

5. Equations of State, Thermodynamics, and Miscibility Curves for Jovian Planet and Giant Exoplanet Evolutionary Models

Author

Roberto Tejada Arevalo, Yubo Su, Ankan Sur, and Adam Burrows

Subjects
Planetary interior, Solar system gas giant planets, Chemical thermodynamics, Astrophysics, QB460-466
Abstract

The equation of state of hydrogen–helium (H–He) mixtures plays a vital role in the evolution and structure of gas giant planets and exoplanets. Recent equations of state that account for H–He interactions, coupled with H–He immiscibility curves, can now produce more physical evolutionary models, such as accounting for helium rain with greater fidelity than in the past. In this work, we present a set of tools for planetary evolution that provides a Python interface for existing tables of useful thermodynamic quantities, state-of-the-art H–He equations of state, and pressure-dependent H–He immiscibility curves. In particular, for a collection of independent variable choices, we provide scripts to calculate the variety of thermodynamic derivatives used to model convection and energy transport. These include the chemical potential derived from the internal energy, which is a modeling necessity in the presence of composition gradients when entropy is the other primary variable. Finally, an entropy-based convection formalism is presented and fully described that highlights the physical differences between adiabatic and isentropic interior models. This centralized resource is meant to facilitate both giant planet structural and evolutionary modeling and the entry of new research groups into the field of giant planet modeling. All tables of thermodynamic quantities and derivatives are available at https://github.com/Rob685/hhe_eos_misc , along with a unified Python interface. Tutorials demonstrating the interface are also available in the repository.

Published
2024
Full Text
View/download PDF

6. Jupiter Atmospheric Models and Outer Boundary Conditions for Giant Planet Evolutionary Calculations

Author

Yi-Xian Chen, Adam Burrows, Ankan Sur, and Roberto Tejada Arevalo

Subjects
Extrasolar gaseous giant planets, Solar system gas giant planets, Jupiter, Exoplanet atmospheres, Planetary atmospheres, Astrophysics, QB460-466
Abstract

We present updated atmospheric tables suitable for calculating the post-formation evolution and cooling of Jupiter and Jupiter-like exoplanets. These tables are generated using a 1D radiative transfer modeling code that incorporates the latest opacities and realistic prescriptions for stellar irradiation and ammonia clouds. To ensure the accuracy of our model parameters, we calibrate them against the measured temperature structure and geometric albedo spectrum of Jupiter, its effective temperature, and its inferred internal temperature. As a test case, we calculate the cooling history of Jupiter using an adiabatic and homogeneous interior and compare with extant models now used to evolve Jupiter and the giant planets. We find that our model reasonably matches Jupiter after evolving a hot-start initial condition to the present age of the solar system, with a discrepancy in brightness temperature/radius within 2%. Our algorithm allows us to customize for different cloud, irradiation, and metallicity parameters. This class of boundary conditions can be used to study the evolution of solar system giant planets and exoplanets with more complicated interior structures and nonadiabatic, inhomogeneous internal profiles.

Published
2023
Full Text
View/download PDF

7. Open data from the first and second observing runs of Advanced LIGO and Advanced Virgo

Author

Rich Abbott, Thomas D. Abbott, Sheelu Abraham, Fausto Acernese, Kendall Ackley, Carl Adams, Rana X. Adhikari, Vaishali B. Adya, Christoph Affeldt, Michalis Agathos, Kazuhiro Agatsuma, Nancy Aggarwal, Odylio D. Aguiar, Amit Aich, Lorenzo Aiello, Anirban Ain, Ajith Parameswaran, Gabrielle Allen, Annalisa Allocca, Paul A. Altin, Alex Amato, Shreya Anand, Alena Ananyeva, Stuart B. Anderson, Warren G. Anderson, Svetoslava V. Angelova, Stefano Ansoldi, Sarah Antier, Stephen Appert, Koji Arai, Melody C. Araya, Joseph S. Areeda, Marc Arène, Nicolas Arnaud, Scott M. Aronson, Kg G. Arun, Stefano Ascenzi, Gregory Ashton, Stuart M. Aston, Pia Astone, Florian Aubin, Peter Aufmuth, Kellie AultONeal, Corey Austin, Valerie Avendano, Stanislav Babak, Philippe Bacon, Francesca Badaracco, Maria K.M. Bader, Sangwook Bae, Anne M. Baer, Jonathon Baird, Francesca Baldaccini, Giulio Ballardin, Stefan W. Ballmer, Anna-marie Bals, Alexander Balsamo, Gregory Baltus, Sharan Banagiri, Deepak Bankar, Rameshwar S. Bankar, Juan C. Barayoga, Claudio Barbieri, Barry C. Barish, David Barker, Kevin Barkett, Pablo Barneo, Fabrizio Barone, Bryan Barr, Lisa Barsotti, Matteo Barsuglia, Daniel Barta, Jeffrey Bartlett, Imre Bartos, Riccardo Bassiri, Andrea Basti, Mateusz Bawaj, Joseph C. Bayley, Marco Bazzan, Bence Bécsy, Michal Bejger, Imene Belahcene, Angus S. Bell, Deeksha Beniwal, Michael G. Benjamin, Joe D. Bentley, Fabio Bergamin, Beverly K. Berger, Gerald Bergmann, Sebastiano Bernuzzi, Christopher P.L. Berry, Diego Bersanetti, Alessandro Bertolini, Joseph Betzwieser, Rohan Bhandare, Ankit V. Bhandari, Jeffrey Bidler, Edward Biggs, Igor A. Bilenko, Garilynn Billingsley, Ross Birney, Ofek Birnholtz, Sebastien Biscans, Matteo Bischi, Sylvia Biscoveanu, Aparna Bisht, Guldauren Bissenbayeva, Massimiliano Bitossi, Marieanne A. Bizouard, Kent K. Blackburn, Jonathan Blackman, Carl D. Blair, David G. Blair, Ryan M. Blair, Fabrizio Bobba, Nina Bode, Michel Boer, Yannick Boetzel, Gilles Bogaert, Francois Bondu, Edgard Bonilla, Romain Bonnand, Phillip Booker, Boris A. Boom, Rolf Bork, Valerio Boschi, Sukanta Bose, Vladimir Bossilkov, Joel Bosveld, Yann Bouffanais, Antonella Bozzi, Carlo Bradaschia, Patrick R. Brady, Alyssa Bramley, Marica Branchesi, Jim E. Brau, Matteo Breschi, Tristan Briant, Joseph H. Briggs, Francesco Brighenti, Alain Brillet, Marc Brinkmann, Patrick Brockill, Aidan F. Brooks, Jonathan Brooks, Daniel D. Brown, Sharon Brunett, Giacomo Bruno, Robert Bruntz, Aaron Buikema, Tomasz Bulik, Henk J. Bulten, Alessandra Buonanno, Damir Buskulic, Robert L. Byer, Miriam Cabero, Laura Cadonati, Giampietro Cagnoli, Craig Cahillane, Juan Calderón Bustillo, Jack D. Callaghan, Thomas A. Callister, Enrico Calloni, Jordan B. Camp, Maurizio Canepa, Kipp C. Cannon, Huy-tuong Cao, Junwei Cao, Giovanni Carapella, Franco Carbognani, Santiago Caride, Matthew F. Carney, Gregorio Carullo, Julia Casanueva Diaz, Claudio Casentini, Javier Castañeda, Sarah Caudill, Marco Cavaglià, Fabien Cavalier, Roberto Cavalieri, Giancarlo Cella, Pablo Cerdá-Durán, Elisabetta Cesarini, Oualid Chaibi, Kabir Chakravarti, Chiwai Chan, Manleong Chan, Shiuh Chao, Philip Charlton, Eve A. Chase, Eric Chassande-Mottin, Deep Chatterjee, Mayank Chaturvedi, Hsin-yu Y. Chen, Xu Chen, Yanbei Chen, Hai-ping Cheng, Chi-kit K. Cheong, Hanyu Y. Chia, Francesco Chiadini, Roberto Chierici, Andrea Chincarini, Antonino Chiummo, Gihyuk Cho, Heesuk S. Cho, Min-a Cho, Nelson Christensen, Qi Chu, Sheon Chua, Ka-wai W. Chung, Shinkee Chung, Giacomo Ciani, Pawel Ciecielag, Marek Cieślar, Alexei A. Ciobanu, Riccardo Ciolfi, Francesco Cipriano, Alessio Cirone, Filiberto Clara, James A. Clark, Patrick Clearwater, Sebastien Clesse, Frederic Cleva, Eugenio Coccia, Pierre-francois Cohadon, David Cohen, Marta Colleoni, Christophe G. Collette, Christopher Collins, Monica Colpi, Marcio Constancio Jr., Livia Conti, Sam J. Cooper, Paul Corban, Thomas R. Corbitt, Isabel Cordero-Carrión, Silvia Corezzi, Kenneth R. Corley, Neil Cornish, David Corre, Alessandra Corsi, Stefano Cortese, Cesar A. Costa, Roberto Cotesta, Michael W. Coughlin, Scott B. Coughlin, Jeanpierre Coulon, Stefan T. Countryman, Peter Couvares, Pep B. Covas, David M. Coward, Matthew J. Cowart, Dennis C. Coyne, Robert Coyne, Jolien D. E. Creighton, Teviet D. Creighton, Jonathan Cripe, Michael Croquette, Sgwynne G. Crowder, Jean-rene Cudell, Torrey J. Cullen, Alan Cumming, Rebecca Cummings, Liam Cunningham, Elena Cuoco, Malgorzata Curylo, Tito Dal Canton, Gergely Dálya, Aykutlu Dana, Lara M. Daneshgaran-Bajastani, Beatrice D’Angelo, Stefan L. Danilishin, Sabrina D’Antonio, Karsten Danzmann, Christian Darsow-Fromm, Arnab Dasgupta, Laurence E. H. Datrier, Vincenzo Dattilo, Ishant Dave, Michel Davier, Gareth S. Davies, Derek Davis, Edward J. Daw, Dan DeBra, Malathi Deenadayalan, Jerome Degallaix, Martina De Laurentis, Samuel Deléglise, Matthew Delfavero, Nicola De Lillo, Walter Del Pozzo, Lindsay M. DeMarchi, Virginia D’Emilio, Nicholas Demos, Thomas Dent, Roberto De Pietri, Rosario De Rosa, Camilla De Rossi, Riccardo DeSalvo, Omar de Varona, Sanjeev Dhurandhar, Mario C. Díaz, Mauricio Diaz-Ortiz Jr., Tim Dietrich, Luciano Di Fiore, Chiara Di Fronzo, Cinzia Di Giorgio, Fabrizio Di Giovanni, Matteo Di Giovanni, Tristano Di Girolamo, Alberto Di Lieto, Binlei Ding, Sibilla Di Pace, Irene Di Palma, Francesco Di Renzo, Atul K. Divakarla, Artemiy Dmitriev, Zoheyr Doctor, Fred Donovan, Katherine L. Dooley, Suresh Doravari, Iain Dorrington, Thomas P. Downes, Marco Drago, Jenne C. Driggers, Zhihui Du, Jean-gregoire Ducoin, Peter Dupej, Ofelia Durante, Domenico D’Urso, Sheila E. Dwyer, Paul J. Easter, Graeme Eddolls, Bruce Edelman, Tega B. Edo, Oliver Edy, Anamaria Effler, Phil Ehrens, Johannes Eichholz, Stephen S. Eikenberry, Marc Eisenmann, Robert A. Eisenstein, Aldo Ejlli, Lucianolucianikerrico Errico, Reed C. Essick, Hector Estelles, Dimitri Estevez, Zachariah B. Etienne, Todd Etzel, Matthew Evans, Tom M. Evans, Rebecca E. Ewing, Viviana Fafone, Stephen Fairhurst, Xilong Fan, Stefania Farinon, Benjamin Farr, Will M. Farr, Edward J. Fauchon-Jones, Marc Favata, Maxime Fays, Mariana Fazio, Jon Feicht, Martin M. Fejer, Fangchen Feng, Edit Fenyvesi, Deborah L. Ferguson, Alvaro Fernandez-Galiana, Isidoro Ferrante, Elvis C. Ferreira, Tabata A. Ferreira, Francesco Fidecaro, Irene Fiori, Donatella Fiorucci, Maya Fishbach, Ryan P. Fisher, Rosalba Fittipaldi, Margot Fitz-Axen, Vincenzo Fiumara, Raffaele Flaminio, Erik Floden, Eric Flynn, Heather Fong, Antonio A. Font, Perry Forsyth, Jean-daniel Fournier, Sergio Frasca, Franco Frasconi, Zsolt Frei, Andreas Freise, Raymond Frey, Valentin Frey, Peter Fritschel, Valery V. Frolov, Gabriele Fronzè, Paul Fulda, Michael Fyffe, Hunter A. Gabbard, Bhooshan U. Gadre, Sebastian M. Gaebel, Jonathan R. Gair, Shanika Galaudage, Dhruva Ganapathy, Sharad G. Gaonkar, Cecilio García-Quirós, Fabio Garufi, Bubba Gateley, Sergio Gaudio, Gayathri Gayathri, Gianluca Gemme, Eric Genin, Alberto Gennai, Daniel George, Jogy George, Laszlo Gergely, Sudarshan Ghonge, Abhirup Ghosh, Archisman Ghosh, Shaon Ghosh, Bruno Giacomazzo, Joe A. Giaime, Dwayne D. Giardina, Des R. Gibson, Chalisa Gier, Kiranjyot Gill, Jane Glanzer, Jan Gniesmer, Patrick Godwin, Evan Goetz, Ryan Goetz, Niklas Gohlke, Boris Goncharov, Gabriela González, Gopakumar Gopakumar, Sarah E. Gossan, Matthieu Gosselin, Romain Gouaty, Benjamin Grace, Aniello Grado, Massimo Granata, Alastair Grant, Slawomir Gras, Philippe Grassia, Corey Gray, Rachel Gray, Giuseppe Greco, Anna C. Green, Rhys Green, Elizabeth M. Gretarsson, Hannah L. Griggs, G. Grignani, Andrea Grimaldi, Stefan J. Grimm, Hartmut Grote, Steffen Grunewald, Pierre Gruning, Gianluca M. Guidi, Andre R. Guimaraes, Gerard Guixé, Hitesh K. Gulati, Yuefan Guo, Anuradha Gupta, Anchal Gupta, Pawan Gupta, Eric K. Gustafson, Dick Gustafson, Leila Haegel, Odysse Halim, Evan D. Hall, Eleanor Z. Hamilton, Giles Hammond, Maria Haney, Manuela M. Hanke, Jonathan Hanks, Chad Hanna, Mark D. Hannam, Otto A. Hannuksela, Travis J. Hansen, Joe Hanson, Thomas Harder, Terra Hardwick, Haris Haris, Jan Harms, Gregg M. Harry, Ian W. Harry, Raine K. Hasskew, Carl-johan Haster, Karen Haughian, Fergus J. Hayes, James Healy, Antoine Heidmann, Matthew C. Heintze, Joscha Heinze, Henrich Heitmann, Frances Hellman, Patrice Hello, Gary Hemming, Martin Hendry, Siong S. Heng, Eric Hennes, Jan-simon Hennig, Michele Heurs, Stefan Hild, Tanja Hinderer, Sarah Y. Hoback, Sven Hochheim, Elyssa Hofgard, David Hofman, Aaron M. Holgado, Nathan A. Holland, Kathy Holt, Daniel E. Holz, Paul Hopkins, Christian Horst, James Hough, Eric J. Howell, Charlie G. Hoy, Yiwen Huang, Moritz T. Hübner, Eliu A. Huerta, Dominique Huet, Brennan Hughey, Victor Hui, Sascha Husa, Sabina H. Huttner, Rachael Huxford, Tien Huynh-Dinh, Bartosz Idzkowski, Alberto Iess, Henri Inchauspe, Craig Ingram, Giuseppe Intini, Jean M. Isac, Max Isi, Bala R. Iyer, Thibaut Jacqmin, Sameer J. Jadhav, Shreejit P. Jadhav, Alasdair L. James, Karan Jani, Nagaraj N. Janthalur, Piotr Jaranowski, Deep Jariwala, Rafel Jaume, Alex C. Jenkins, Jun Jiang, Grace R. Johns, Aaron W. Jones, Ian I. Jones, Jeff D. Jones, Philip Jones, Russell Jones, Reinier J. G. Jonker, Ju Ju, Jonas Junker, Chinmay V. Kalaghatgi, Vassiliki Kalogera, Brittany Kamai, Shivaraj Kandhasamy, Gungwon Kang, Jonah B. Kanner, Shasvath J. Kapadia, Sudarshan Karki, Rahul Kashyap, Marie Kasprzack, Wolfgang Kastaun, Stavros Katsanevas, Erik Katsavounidis, William Katzman, Steffen Kaufer, Keita Kawabe, Fabien Kéfélian, David Keitel, Azadeh Keivani, Ross Kennedy, Joey S. Key, Sudiksha Khadka, Farit Y. Khalili, Imran Khan, Sebastian Khan, Zaki A. Khan, Efim A. Khazanov, Nandita Khetan, Mohammad Khursheed, Nutsinee Kijbunchoo, Chunglee Kim, Grace J. Kim, Jeongcho C. Kim, Kyungmin Kim, Won Kim, Whansun S. Kim, Young-min Kim, Charles Kimball, Peter J. King, Maya Kinley-Hanlon, Robin Kirchhoff, Jeffrey S. Kissel, Lisa Kleybolte, Sergei Klimenko, Tyler D. Knowles, Philip Koch, Sina M. Koehlenbeck, Gideon Koekoek, Soumen Koley, Veronica Kondrashov, Antonios Kontos, Nico Koper, Mikhail Korobko, William Z. Korth, Manoj Kovalam, Dan B. Kozak, Volker Kringel, Nv V. Krishnendu, Andrzej Królak, Natalie Krupinski, Gerrit Kuehn, Anil Kumar, Prayush Kumar, Rahul Kumar, Rakesh Kumar, Sumit Kumar, Ling-chi Kuo, Adam Kutynia, Benjamin D. Lackey, Danny Laghi, Emile Lalande, Lam L. Lam, Astrid Lamberts, Michael Landry, Benjamin B. Lane, Ryan N. Lang, Jacob Lange, Brian Lantz, Robert K. Lanza, Iuri La Rosa, Angelique Lartaux-Vollard, Paul D. Lasky, Michael Laxen, Albert Lazzarini, Claudia Lazzaro, Paola Leaci, Sean Leavey, Yannick K. Lecoeuche, Chang-hwan H. Lee, Hyung-mok M. Lee, Hyungwon W. Lee, Joongoo Lee, Kyung-ha Lee, Johannes Lehmann, Nicolas Leroy, Nicolas Letendre, Yuri Levin, Alvin K. Y. Li, Jin Li, Kaye li, Tjonnie G. F. Li, Xiang Li, Frank Linde, Seth D. Linker, Jethro N. Linley, Tyson B. Littenberg, Liu Liu, Xiaoshu Liu, Miquel Llorens-Monteagudo, Ka-lok Lo, Alexandra Lockwood, Lionel T. London, Alessandro Longo, Matteo Lorenzini, Vincent Loriette, Marc Lormand, Giovanni Losurdo, James D. Lough, Carlos O. Lousto, Geoffrey Lovelace, Harald Lück, Diana Lumaca, Andrew P. Lundgren, Ma Yiqiu, Ronaldas Macas, Sean Macfoy, Myron MacInnis, Duncan M. Macleod, Ian O. MacMillan, Adrian Macquet, Ignacio Magaña Hernandez, Fabian Magaña-Sandoval, Ryan M. Magee, Ettore Majorana, Ivan Maksimovic, Asmita Malik, Catherine Man, Vuk Mandic, Valentina Mangano, Georgia L. Mansell, Michael Manske, Maddalena Mantovani, Michela Mapelli, Fabio Marchesoni, Frederique Marion, Szabolcs Márka, Zsuzsanna Márka, Charalampos Markakis, Ashot S. Markosyan, Aaron Markowitz, Ed Maros, Antonio Marquina, Sylvain Marsat, Filippo Martelli, Ian W. Martin, Rodica M. Martin, Valerie Martinez, Denis V. Martynov, Hossein Masalehdan, Ken Mason, Elena Massera, Alain Masserot, Thomas J. Massinger, Mariela Masso-Reid, Simone Mastrogiovanni, Andrew Matas, Fabrice Matichard, Nergis Mavalvala, Emily Maynard, Joshua J. McCann, Richard McCarthy, David E. McClelland, Scott McCormick, Lee McCuller, Stephen C. McGuire, Connor McIsaac, Jessica McIver, David J. McManus, Terry McRae, Sean T. McWilliams, Duncan Meacher, Grant D. Meadors, Moritz Mehmet, Ajit K. Mehta, Elena Mejuto Villa, Andrew Melatos, Gregory Mendell, Adam A. Mercer, Lorenzo Mereni, Kara Merfeld, Edmond L. Merilh, Jonathan D. Merritt, Mourad Merzougui, Syd Meshkov, Chris Messenger, Cody Messick, Remi Metzdorff, Patrick M. Meyers, Fabian Meylahn, Ashish Mhaske, Andrea Miani, Haixing Miao, Ioannis Michaloliakos, Christophe Michel, Hannah Middleton, Leopoldo Milano, Andrewlawrence L. Miller, Meg Millhouse, Joseph C. Mills, Edoardo Milotti, Michael C. Milovich-Goff, Olivier Minazzoli, Yuri Minenkov, Alec Mishkin, Chandra Mishra, Timesh Mistry, Sanjit Mitra, Valery P. Mitrofanov, Guenakh Mitselmakher, Richard Mittleman, Geoffrey Mo, Kentaro Mogushi, Satyanarayan R. P. Mohapatra, Siddharth R. Mohite, Manel Molina-Ruiz, Marina Mondin, Matteo Montani, Christopher J. Moore, Dan Moraru, Filip Morawski, Gerardo Moreno, Soichiro Morisaki, Benoit Mours, Conor M. Mow-Lowry, Simone Mozzon, Federico Muciaccia, Arunava Mukherjee, Debnandini Mukherjee, Soma Mukherjee, Subroto Mukherjee, Nikhil Mukund, Adam Mullavey, Jesper Munch, Erik A. Muñiz, Peter G. Murray, Alessandro Nagar, Ilaria Nardecchia, Luca Naticchioni, Rajesh K. Nayak, Benjamin F. Neil, Joshua Neilson, Gijs Nelemans, Timothy J. N. Nelson, Marina Nery, Ansel Neunzert, Kwan-yeung Y. Ng, Sebastian Ng, Catherine Nguyen, Philippe Nguyen, David Nichols, Shania A. Nichols, Samaya Nissanke, Flavio Nocera, Minkyun Noh, Chris North, Devon Nothard, Laura K. Nuttall, Jason Oberling, Brendan D. O’Brien, Gor Oganesyan, Greg H. Ogin, John J. Oh, Sanghoon H. Oh, Frank Ohme, Hiroaki Ohta, Marcos A. Okada, Miquel Oliver, Christian Olivetto, Patrick Oppermann, Richard Oram, Brian O’Reilly, Rich G. Ormiston, Luis F. Ortega, Richard O’Shaughnessy, Serguei Ossokine, Charles Osthelder, David J. Ottaway, Harry Overmier, Ben J. Owen, Alexander E. Pace, Giulia Pagano, Michael A. Page, Giulia Pagliaroli, Archana Pai, Siddhesh A. Pai, Jordan R. Palamos, Oleg Palashov, Cristiano Palomba, Howard Pan, Pratap K. Panda, Tsun-ho Pang, Chris Pankow, Francesco Pannarale, Brijesh C. Pant, Federico Paoletti, Andrea Paoli, Abhishek Parida, William Parker, Daniela Pascucci, Antonio Pasqualetti, Roberto Passaquieti, Diego Passuello, Barbara Patricelli, Ethan Payne, Brynley L. Pearlstone, Thida C. Pechsiri, Ari J. Pedersen, Mike Pedraza, Arnaud Pele, Steven Penn, Albino Perego, Carlos J. Perez, Perigois Périgois, Antonio Perreca, Stephane Perriès, Jan Petermann, Harald P. Pfeiffer, Margot Phelps, Khun S. Phukon, Ornella J. Piccinni, Mikhael Pichot, Marco Piendibene, Francesco Piergiovanni, Vincenzo Pierro, Gabriel Pillant, Laurent Pinard, Innocenzo M. Pinto, Krzysztof Piotrzkowski, Marc Pirello, Matthew Pitkin, Wolfango Plastino, Rosa Poggiani, Yat-tung T. Pong, Sarah Ponrathnam, Pasquale Popolizio, Ed K. Porter, Jade Powell, Atul K. Prajapati, Kiran Prasai, Raghurama Prasanna, Geraint Pratten, Tanner Prestegard, Maria Principe, Giovanni A. Prodi, Leonid Prokhorov, Michele Punturo, Paola Puppo, Michael Pürrer, Hong Qi, Volker Quetschke, Pedro J. Quinonez, Fred J. Raab, Geert Raaijmakers, Hugh Radkins, Nicholas Radulesco, Peter Raffai, Hanna Rafferty, Sendhil Raja, Rajan Rajan, Binod Rajbhandari, Malik Rakhmanov, Karla E. Ramirez, Antoni Ramos-Buades, Javed Rana, Kaushik Rao, Piero Rapagnani, Vivien Raymond, Massimiliano Razzano, Jocelyn Read, Tania Regimbau, Luca Rei, Stuart Reid, David H. Reitze, Piero Rettegno, Fulvio Ricci, Colter J. Richardson, Jonathan W. Richardson, Paul M. Ricker, Gunnar Riemenschneider, Keith Riles, Monica Rizzo, Norna A. Robertson, Florent Robinet, Alessio Rocchi, Ramon D. Rodriguez-Soto, Loic Rolland, Jameson G. Rollins, Vincent J. Roma, Marco Romanelli, Rocco Romano, Chandra L. Romel, Isobel M. Romero-Shaw, Janeen H. Romie, Caitlin A. Rose, Dakota Rose, Kyle Rose, Dorota Rosińska, Shawn G. Rosofsky, Michael P. Ross, Sheila Rowan, Samuel J. Rowlinson, Palash K. Roy, Santosh Roy, Soumen Roy, Paolo Ruggi, Guntis Rutins, Kyle Ryan, Surabhi Sachdev, Travis Sadecki, Mairi Sakellariadou, Om S. Salafia, Livio Salconi, Muhammed Saleem, Anuradha Samajdar, Eduardo J. Sanchez, Luis E. Sanchez, Nicolas Sanchis-Gual, Jaclyn R. Sanders, Kevin A. Santiago, Edison Santos, Nikhil Sarin, Benoit Sassolas, B S. Sathyaprakash, Orion Sauter, Richard L. Savage, Vaibhav Savant, Disha Sawant, Sihem Sayah, Dean Schaetzl, Paul Schale, Mark Scheel, Jacob Scheuer, Patricia Schmidt, Roman Schnabel, Robert M. S. Schofield, Axel Schönbeck, Emil Schreiber, Bernd W. Schulte, Bernard F. Schutz, Otto Schwarm, Eyal Schwartz, Jamie Scott, Susan M. Scott, Ed Seidel, Danny Sellers, Anand S. Sengupta, Noah Sennett, Daniel Sentenac, Valeria Sequino, Alexander Sergeev, Yoshinta Setyawati, Daniel A. Shaddock, Thomas Shaffer, Selim S. Shahriar, A. Sharma, Priyanka Sharma, Peter Shawhan, Hongyu Shen, Minori Shikauchi, Rosalie Shink, David H. Shoemaker, Deirdre M. Shoemaker, Keerti Shukla, Shyamsundar ShyamSundar, Karelle Siellez, Magdalena Sieniawska, Daniel Sigg, Leo P. Singer, Divya Singh, Neha Singh, Ayatri Singha, Akshat Singhal, Alicia M. Sintes, Valeria Sipala, Vasileios Skliris, Bram J. J. Slagmolen, Teresa J. Slaven-Blair, Jiri Smetana, Joshua R. Smith, Rory J. E. Smith, Surendranadh Somala, Edwin J. Son, Siddharth Soni, Borja Sorazu, Viola Sordini, Fiodor Sorrentino, Tarun Souradeep, Eric Sowell, Andrew P. Spencer, Mario Spera, Amit K. Srivastava, Varun Srivastava, Kai Staats, Cosmin Stachie, Mark Standke, Daniele A. Steer, Michael Steinke, Jessica Steinlechner, Sebastian Steinlechner, Daniel Steinmeyer, Dane Stocks, David J. Stops, Madeline Stover, Ken A. Strain, Giulia Stratta, Amber Strunk, Riccardo Sturani, Amber L. Stuver, Sudhagar Sudhagar, Vivishek Sudhir, Tiffany Z. Summerscales, Ling Sun, Sunil Sunil, Ankan Sur, Jishnu Suresh, Patrick J. Sutton, Bas L. Swinkels, Marek J. Szczepańczyk, Matteo Tacca, Simon C. Tait, Colm Talbot, Andres J. Tanasijczuk, David B. Tanner, Duo Tao, Marton Tápai, Amauri Tapia, Enzo N. Tapia San Martin, Jay D. Tasson, Robert Taylor, Rodrigo Tenorio, Lukas Terkowski, Manasadevi P. Thirugnanasambandam, Michael Thomas, Patrick Thomas, Jonathan E. Thompson, Sivananda R. Thondapu, Keith A. Thorne, Eric Thrane, Calley L. Tinsman, Saravanan R. Saravanan, Shubhanshu Tiwari, Srishti Tiwari, Vaibhav Tiwari, Karl Toland, Mauro Tonelli, Zeno Tornasi, Alejandro Torres-Forné, Calum I. Torrie, Iara Tosta e Melo, Daniel Töyrä, Emily A. Trail, Flavio Travasso, Gary Traylor, Maria C. Tringali, Aashish Tripathee, Agata Trovato, Randy J. Trudeau, Ka-wa W. Tsang, Maggie Tse, Rhondale Tso, Leo Tsukada, Daichi Tsuna, Takuya Tsutsui, Margherita Turconi, Amit S. Ubhi, Koh Ueno, Dennis Ugolini, Cs S. Unnikrishnan, Alexander L. Urban, Samantha A. Usman, Andrei C. Utina, Henning Vahlbruch, Gabriele Vajente, Guillermo Valdes, Michele Valentini, M. Vallisneri, Niels van Bakel, Martin van Beuzekom, Jo F. J. van den Brand, Chris Van Den Broeck, Daniel C. Vander-Hyde, Laura van der Schaaf, Joris V. Van Heijningen, Marielle A. van Veggel, Marco Vardaro, Vijay Varma, Steve Vass, Matyas Vasúth, Alberto Vecchio, Gabriele Vedovato, John Veitch, Peter J. Veitch, Krishna Venkateswara, Gautam Venugopalan, Didier Verkindt, Doga Veske, Flavio Vetrano, Andrea Viceré, Aaron D. Viets, Serena Vinciguerra, David J. Vine, Jeanyves Vinet, Salvatore Vitale, Francisco Hernandez Vivanco, Thomas Vo, Helios Vocca, Cheryl Vorvick, Sergey P. Vyatchanin, Andrew R. Wade, Leslie E. Wade, Madeline Wade, Rob Walet, Marissa Walker, Gavin S. Wallace, Larry Wallace, Sinead Walsh, Jonathan Z. Wang, Sibo Wang, Wenhui H. Wang, Yifan F. Wang, Robert L. Ward, Zane A. Warden, Jim Warner, Michal Was, Jennifer Watchi, Betsy Weaver, Li-wei Wei, Michael Weinert, Alan J. Weinstein, Rainer Weiss, Felix Wellmann, Linqing Wen, Peter Weßels, Jonathan W. Westhouse, Karl Wette, John T. Whelan, Bernard F. Whiting, Chris Whittle, Dennis M. Wilken, Daniel Williams, Roy D. Williams, Andrew R. Williamson, Joshua L. Willis, Benno Willke, Walter Winkler, Christopher C. Wipf, Holger Wittel, Graham Woan, Janis Woehler, Jared K. Wofford, Chun-fung Wong, Jennifer L. Wright, David S. Wu, Daniel M. Wysocki, Liting Xiao, Hiro Yamamoto, Le Yang, Yang Yang, Ziyan Yang, Min-jet J. Yap, Maher Yazback, David W. Yeeles, Hang Yu, Haocun Yu, Shingheirobin Yuen, Adam K. Zadrożny, Adam Zadrożny, Michele Zanolin, Tatiana Zelenova, Jean-pierre Zendri, Michael Zevin, Jue Zhang, Liyuan Zhang, Teng Zhang, Chunnong Zhao, Guoying Zhao, Minchuan Zhou, Zifan Zhou, Xingjiang J. Zhu, Aaron B. Zimmerman, Michael E. Zucker, and John Zweizig

Subjects
GWOSC, Scientific databases, Data representation and management, Gravitational Waves, Computer software, QA76.75-76.765
Abstract

Advanced LIGO and Advanced Virgo are monitoring the sky and collecting gravitational-wave strain data with sufficient sensitivity to detect signals routinely. In this paper we describe the data recorded by these instruments during their first and second observing runs. The main data products are gravitational-wave strain time series sampled at 16384 Hz. The datasets that include this strain measurement can be freely accessed through the Gravitational Wave Open Science Center at http://gw-openscience.org, together with data-quality information essential for the analysis of LIGO and Virgo data, documentation, tutorials, and supporting software.

Published
2021
Full Text
View/download PDF

8. Long-term general relativistic magnetohydrodynamics simulations of magnetic field in isolated neutron stars

Author

Ankan Sur, William Cook, David Radice, Brynmor Haskell, and Sebastiano Bernuzzi

Subjects
Physics::Plasma Physics, Space and Planetary Science, Astronomy and Astrophysics
Abstract

Strong magnetic fields play an important role in powering the emission of neutron stars. Nevertheless, a full understanding of the interior configuration of the field remains elusive. In this work, we present general relativistic magnetohydrodynamics (MHD) simulations of the magnetic field evolution in neutron stars lasting ${\sim } {880}\,$ms (∼6.5 Alfvén crossing periods) and up to resolutions of $0.1155\,$km using Athena++. We explore two different initial conditions, one with purely poloidal magnetic field and the other with a dominant toroidal component, and study the poloidal and toroidal field energies, the growth times of the various instability-driven oscillation modes, and turbulence. We find that the purely poloidal setup generates a toroidal field, which later decays exponentially reaching $1{{\ \rm per\ cent}}$ of the total magnetic energy, showing no evidence of reaching equilibrium. The initially stronger toroidal field setup, on the other hand, loses up to 20 per cent of toroidal energy and maintains this state till the end of our simulation. We also explore the hypothesis, drawn from previous MHD simulations, that turbulence plays an important role in the quasi-equilibrium state. An analysis of the spectra in our higher resolution setups reveals, however, that in most cases we are not observing turbulence at small scales, but rather a noisy velocity field inside the star. We also observe that the majority of the magnetic energy gets dissipated as heat increasing the internal energy of the star, while a small fraction gets radiated away as electromagnetic radiation.

Published
2022
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results