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Your search keyword '"Guðmundur Stefánsson"' showing total 5 results
Start Over Author "Guðmundur Stefánsson" Publication Type Reports
5 results on '"Guðmundur Stefánsson"'

1. TOI-561 b: A Low-density Ultra-short-period “Rocky' Planet around a Metal-poor Star

Author

Casey L. Brinkman, Lauren M. Weiss, Fei Dai, Daniel Huber, Edwin S. Kite, Diana Valencia, Jacob L. Bean, Corey Beard, Aida Behmard, Sarah Blunt, Madison Brady, Benjamin Fulton, Steven Giacalone, Andrew W. Howard, Howard Isaacson, David Kasper, Jack Lubin, Mason MacDougall, Joseph M. Akana Murphy, Mykhaylo Plotnykov, Alex S. Polanski, Malena Rice, Andreas Seifahrt, Guðmundur Stefánsson, and Julian Stürmer

Published
2023
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2. A Close-in Puffy Neptune with Hidden Friends: The Enigma of TOI 620

Author

Michael A. Reefe, Rafael Luque, Eric Gaidos, Corey Beard, Peter P. Plavchan, Marion Cointepas, Bryson L. Cale, Enric Palle, Hannu Parviainen, Dax L. Feliz, Jason Eastman, Keivan Stassun, Jonathan Gagné, Jon M. Jenkins, Patricia T. Boyd, Richard C. Kidwell, Scott McDermott, Karen A. Collins, William Fong, Natalia Guerrero, Jose-Manuel Almenara-Villa, Jacob Bean, Charles A. Beichman, John Berberian, Allyson Bieryla, Xavier Bonfils, François Bouchy, Madison Brady, Edward M. Bryant, Luca Cacciapuoti, Caleb I. Cañas, David R. Ciardi, Kevin I. Collins, Ian J. M. Crossfield, Courtney D. Dressing, Philipp Eigmüller, Mohammed El Mufti, Emma Esparza-Borges, Akihiko Fukui, Peter Gao, Claire Geneser, Crystal L. Gnilka, Erica Gonzales, Arvind F. Gupta, Sam Halverson, Fred Hearty, Steve B. Howell, Jonathan Irwin, Shubham Kanodia, David Kasper, Takanori Kodama, Veselin Kostov, David W. Latham, Monika Lendl, Andrea Lin, John H. Livingston, Jack Lubin, Suvrath Mahadevan, Rachel Matson, Elisabeth Matthews, Felipe Murgas, Norio Narita, Patrick Newman, Joe Ninan, Ares Osborn, Samuel N. Quinn, Paul Robertson, Arpita Roy, Joshua Schlieder, Christian Schwab, Andreas Seifahrt, Gareth D. Smith, Ahmad Sohani, Guðmundur Stefánsson, Daniel Stevens, Julian Stürmer, Angelle Tanner, Ryan Terrien, Johanna Teske, David Vermilion, Sharon X. Wang, Justin Wittrock, Jason T. Wright, Mathias Zechmeister, and Farzaneh Zohrabi

Published
2022
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3. Target Prioritization and Observing Strategies for the NEID Earth Twin Survey

Author

Arvind F. Gupta, Jason T. Wright, Paul Robertson, Samuel Halverson, Jacob Luhn, Arpita Roy, Suvrath Mahadevan, Eric B. Ford, Chad F. Bender, Cullen H. Blake, Fred Hearty, Shubham Kanodia, Sarah E. Logsdon, Michael W. McElwain, Andrew Monson, Joe P. Ninan, Christian Schwab, Guðmundur Stefánsson, and Ryan C. Terrien

Subjects
Astronomy, Astrophysics
Abstract

NEID is a high-resolution optical spectrograph on the WIYN 3.5 m telescope at Kitt Peak National Observatory and will soon join the new generation of extreme precision radial velocity instruments in operation around the world. We plan to use the instrument to conduct the NEID Earth Twin Survey (NETS) over the course of the next 5 years, collecting hundreds of observations of some of the nearest and brightest stars in an effort to probe the regime of Earth-mass exoplanets. Even if we take advantage of the extreme instrumental precision conferred by NEID, it will be difficult to disentangle the weak (~10 cm/s) signals induced by such low-mass, long-period exoplanets from stellar noise for all but the quietest host stars. In this work, we present a set of quantitative selection metrics which we use to identify an initial NETS target list consisting of stars conducive to the detection of exoplanets in the regime of interest. We also outline a set of observing strategies with which we aim to mitigate uncertainty contributions from intrinsic stellar variability and other sources of noise.

Published
2021
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4. Rotational Modulation of Spectroscopic Zeeman Signatures in Low-mass Stars

Author

Ryan C Terrien, Allison Keen, Katy Oda, Winter Parts(they/them), Guðmundur Stefánsson, Suvrath Mahadevan, Paul Robertson, Joe P. Ninan, Corey Beard, Chad F. Bender, William D. Cochran, Katia Cunha, Scott A. Diddams, Connor Fredrick, Samuel Halverson, Fred Hearty, Adam Ickler, Shubham Kanodia, Jessica E. Libby-Roberts, Jack Lubin, Andrew J. Metcalf, Freja Olsen, Lawrence W. Ramsey, Arpita Roy, Christian Schwab, Verne V. Smith, and Ben Turner

Published
2022
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