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Your search keyword '"W V Jacobson-Galán"' showing total 3 results
Start Over Author "W V Jacobson-Galán" Topic astrophysics - high energy astrophysical phenomena
3 results on '"W V Jacobson-Galán"'

1. The Young Supernova Experiment Data Release 1 (YSE DR1): Light Curves and Photometric Classification of 1975 Supernovae

Author

P. D. Aleo, K. Malanchev, S. Sharief, D. O. Jones, G. Narayan, R. J. Foley, V. A. Villar, C. R. Angus, V. F. Baldassare, M. J. Bustamante-Rosell, D. Chatterjee, C. Cold, D. A. Coulter, K. W. Davis, S. Dhawan, M. R. Drout, A. Engel, K. D. French, A. Gagliano, C. Gall, J. Hjorth, M. E. Huber, W. V. Jacobson-Galán, C. D. Kilpatrick, D. Langeroodi, P. Macias, K. S. Mandel, R. Margutti, F. Matasić, P. McGill, J. D. R. Pierel, E. Ramirez-Ruiz, C. L. Ransome, C. Rojas-Bravo, M. R. Siebert, K. W. Smith, K. M. de Soto, M. C. Stroh, S. Tinyanont, K. Taggart, S. M. Ward, R. Wojtak, K. Auchettl, P. K. Blanchard, T. J. L. de Boer, B. M. Boyd, C. M. Carroll, K. C. Chambers, L. DeMarchi, G. Dimitriadis, S. A. Dodd, N. Earl, D. Farias, H. Gao, S. Gomez, M. Grayling, C. Grillo, E. E. Hayes, T. Hung, L. Izzo, N. Khetan, A. N. Kolborg, J. A. P. Law-Smith, N. LeBaron, C.-C. Lin, Y. Luo, E. A. Magnier, D. Matthews, B. Mockler, A. J. G. O’Grady, Y.-C. Pan, C. A. Politsch, S. I. Raimundo, A. Rest, R. Ridden-Harper, A. Sarangi, S. L. Schrøder, S. J. Smartt, G. Terreran, S. Thorp, J. Vazquez, R. J. Wainscoat, Q. Wang, A. R. Wasserman, S. K. Yadavalli, R. Yarza, Y. Zenati, Aleo, PD [0000-0002-6298-1663], Malanchev, K [0000-0001-7179-7406], Sharief, S [0000-0002-0869-8760], Jones, DO [0000-0002-6230-0151], Narayan, G [0000-0001-6022-0484], Foley, RJ [0000-0002-2445-5275], Villar, VA [0000-0002-5814-4061], Angus, CR [0000-0002-4269-7999], Baldassare, VF [0000-0003-4703-7276], Bustamante-Rosell, MJ [0000-0003-0416-9818], Chatterjee, D [0000-0003-0038-5468], Cold, C [0000-0001-7666-1874], Coulter, DA [0000-0003-4263-2228], Davis, KW [0000-0002-5680-4660], Dhawan, S [0000-0002-2376-6979], Drout, MR [0000-0001-7081-0082], Engel, A [0000-0003-2348-483X], French, KD [0000-0002-4235-7337], Gagliano, A [0000-0003-4906-8447], Gall, C [0000-0002-8526-3963], Hjorth, J [0000-0002-4571-2306], Huber, ME [0000-0003-1059-9603], Jacobson-Galán, WV [0000-0002-3934-2644], Kilpatrick, CD [0000-0002-5740-7747], Langeroodi, D [0000-0001-5710-8395], Macias, P [0000-0002-9946-4635], Mandel, KS [0000-0001-9846-4417], Margutti, R [0000-0003-4768-7586], Matasić, F [0000-0001-5306-1948], McGill, P [0000-0002-1052-6749], Pierel, JDR [0000-0002-2361-7201], Ramirez-Ruiz, E [0000-0003-2558-3102], Ransome, CL [0000-0003-4175-4960], Rojas-Bravo, C [0000-0002-7559-315X], Siebert, MR [0000-0003-2445-3891], Smith, KW [0000-0001-9535-3199], De Soto, KM [0000-0002-9886-2834], Stroh, MC [0000-0002-3019-4577], Tinyanont, S [0000-0002-1481-4676], Taggart, K [0000-0002-5748-4558], Ward, SM [0000-0002-1763-2720], Wojtak, R [0000-0001-9666-3164], Auchettl, K [0000-0002-4449-9152], Blanchard, PK [0000-0003-0526-2248], De Boer, TJL [0000-0001-5486-2747], Boyd, BM [0000-0002-0622-1117], Carroll, CM [0000-0003-3574-2963], Chambers, KC [0000-0001-6965-7789], Demarchi, L [0000-0003-4587-2366], Dimitriadis, G [0000-0001-9494-179X], Dodd, SA [0000-0002-3696-8035], Earl, N [0000-0003-1714-7415], Farias, D [0000-0002-6886-269X], Gao, H [0000-0003-1015-5367], Gomez, S [0000-0001-6395-6702], Grayling, M [0000-0002-6741-983X], Grillo, C [0000-0002-5926-7143], Hayes, EE [0000-0003-3847-0780], Hung, T [0000-0002-9878-7889], Izzo, L [0000-0001-9695-8472], Khetan, N [0000-0003-2720-8904], Kolborg, AN [0000-0001-7364-4964], Law-Smith, JAP [0000-0001-8825-4790], Lin, CC [0000-0002-7272-5129], Luo, Y [0000-0002-4623-0683], Magnier, EA [0000-0002-7965-2815], Matthews, D [0000-0002-4513-3849], Mockler, B [0000-0001-6350-8168], O'Grady, AJG [0000-0002-7296-6547], Pan, YC [0000-0001-8415-6720], Politsch, CA [0000-0003-3727-9167], Raimundo, SI [0000-0002-6248-398X], Rest, A [0000-0002-4410-5387], Ridden-Harper, R [0000-0003-1724-2885], Sarangi, A [0000-0002-9820-679X], Schrøder, SL [0000-0003-1735-8263], Smartt, SJ [0000-0002-8229-1731], Terreran, G [0000-0003-0794-5982], Vazquez, J [0000-0003-1576-0830], Wainscoat, RJ [0000-0002-1341-0952], Wang, Q [0000-0001-5233-6989], Wasserman, AR [0000-0002-4186-6164], Yadavalli, SK [0000-0002-0840-6940], Yarza, R [0000-0003-0381-1039], Zenati, Y [0000-0002-0632-8897], and Apollo - University of Cambridge Repository

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), COSMOLOGICAL CONSTRAINTS, DARK ENERGY SURVEY, IA SUPERNOVAE, FOS: Physical sciences, Astronomy and Astrophysics, 5109 Space Sciences, MEDIUM-DEEP SURVEY, PAN-STARRS, I. OBSERVATIONS, Astrophysics - Solar and Stellar Astrophysics, CORE-COLLAPSE SUPERNOVAE, GALAXY REDSHIFT SURVEY, SUPERLUMINOUS SUPERNOVAE, Space and Planetary Science, IC SUPERNOVA, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Instrumentation and Methods for Astrophysics, 51 Physical Sciences, Instrumentation and Methods for Astrophysics (astro-ph.IM), Solar and Stellar Astrophysics (astro-ph.SR), High-Energy Phenomena and Fundamental Physics
Abstract

We present the Young Supernova Experiment Data Release 1 (YSE DR1), comprised of processed multi-color Pan-STARRS1 (PS1) griz and Zwicky Transient Facility (ZTF) gr photometry of 1975 transients with host-galaxy associations, redshifts, spectroscopic/photometric classifications, and additional data products from 2019 November 24 to 2021 December 20. YSE DR1 spans discoveries and observations from young and fast-rising supernovae (SNe) to transients that persist for over a year, with a redshift distribution reaching z~0.5. We present relative SN rates from YSE's magnitude- and volume-limited surveys, which are consistent with previously published values within estimated uncertainties for untargeted surveys. We combine YSE and ZTF data, and create multi-survey SN simulations to train the ParSNIP and SuperRAENN photometric classification algorithms; when validating our ParSNIP classifier on 472 spectroscopically classified YSE DR1 SNe, we achieve 82% accuracy across three SN classes (SNe Ia, II, Ib/Ic) and 90% accuracy across two SN classes (SNe Ia, core-collapse SNe). Our classifier performs particularly well on SNe Ia, with high (>90%) individual completeness and purity, which will help build an anchor photometric SNe Ia sample for cosmology. We then use our photometric classifier to characterize our photometric sample of 1483 SNe, labeling 1048 (~71%) SNe Ia, 339 (~23%) SNe II, and 96 (~6%) SNe Ib/Ic. YSE DR1 provides a training ground for building discovery, anomaly detection, and classification algorithms, performing cosmological analyses, understanding the nature of red and rare transients, exploring tidal disruption events and nuclear variability, and preparing for the forthcoming Vera C. Rubin Observatory Legacy Survey of Space and Time., Accepted to ApJS; 64 pages; 35 figures; 10 tables

Published
2023
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2. Radio and X-Ray Observations of the Luminous Fast Blue Optical Transient AT 2020xnd

Author

Joe S. Bright, Raffaella Margutti, David Matthews, Daniel Brethauer, Deanne Coppejans, Mark H. Wieringa, Brian D. Metzger, Lindsay DeMarchi, Tanmoy Laskar, Charles Romero, Kate D. Alexander, Assaf Horesh, Giulia Migliori, Ryan Chornock, E. Berger, Michael Bietenholz, Mark J. Devlin, Simon R. Dicker, W. V. Jacobson-Galán, Brian S. Mason, Dan Milisavljevic, Sara E. Motta, Tony Mroczkowski, Enrico Ramirez-Ruiz, Lauren Rhodes, Craig L. Sarazin, Itai Sfaradi, and Jonathan Sievers

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Space and Planetary Science, Astronomy, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, QB
Abstract

We present deep X-ray and radio observations of the Fast Blue Optical Transient (FBOT) AT2020xnd/ZTF20acigmel at $z=0.2433$ from $13$d to $269$d after explosion. AT2020xnd belongs to the category of optically luminous FBOTs with similarities to the archetypal event AT2018cow. AT2020xnd shows luminous radio emission reaching $L_{\nu}\approx8\times10^{29}$ergs$^{-1}$Hz$^{-1}$ at 20GHz and $75$d post explosion, accompanied by luminous and rapidly fading soft X-ray emission peaking at $L_{X}\approx6\times10^{42}$ergs$^{-1}$. Interpreting the radio emission in the context of synchrotron radiation from the explosion's shock interaction with the environment we find that AT2020xnd launched a high-velocity outflow ($v\sim$0.1-0.2$c$) propagating into a dense circumstellar medium (effective $\dot M\approx10^{-3}M_{\rm{sol}}$yr$^{-1}$ for an assumed wind velocity of $v_w=1000$kms$^{-1}$). Similar to AT2018cow, the detected X-ray emission is in excess compared to the extrapolated synchrotron spectrum and constitutes a different emission component, possibly powered by accretion onto a newly formed black hole or neutron star. These properties make AT2020xnd a high-redshift analog to AT2018cow, and establish AT2020xnd as the fourth member of the class of optically-luminous FBOTs with luminous multi-wavelength counterparts., Comment: 21 pages, 6 figures, 6 tables. Submitted to ApJ

Published
2022
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3. Final Moments I: Precursor Emission, Envelope Inflation, and Enhanced Mass loss Preceding the Luminous Type II Supernova 2020tlf

Author

W. V. Jacobson-Galán, L. Dessart, D. O. Jones, R. Margutti, D. L. Coppejans, G. Dimitriadis, R. J. Foley, C. D. Kilpatrick, D. J. Matthews, S. Rest, G. Terreran, P. D. Aleo, K. Auchettl, P. K. Blanchard, D. A. Coulter, K. W. Davis, T. J. L. de Boer, L. DeMarchi, M. R. Drout, N. Earl, A. Gagliano, C. Gall, J. Hjorth, M. E. Huber, A. L. Ibik, D. Milisavljevic, Y.-C. Pan, A. Rest, R. Ridden-Harper, C. Rojas-Bravo, M. R. Siebert, K. W. Smith, K. Taggart, S. Tinyanont, Q. Wang, Y. Zenati, Institut d'Astrophysique de Paris (IAP), and Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Astrophysics - Solar and Stellar Astrophysics, 010308 nuclear & particles physics, Space and Planetary Science, 0103 physical sciences, FOS: Physical sciences, Astronomy and Astrophysics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astrophysics - High Energy Astrophysical Phenomena, 010303 astronomy & astrophysics, 01 natural sciences, Solar and Stellar Astrophysics (astro-ph.SR)
Abstract

We present panchromatic observations and modeling of supernova (SN) 2020tlf, the first normal type II-P/L SN with confirmed precursor emission, as detected by the Young Supernova Experiment transient survey with the Pan-STARRS1 telescope. Pre-explosion emission was detected in $riz-$bands at 130 days prior to SN 2020tlf and persisted at relatively constant flux until first light. Soon after discovery, "flash" spectroscopy of SN 2020tlf revealed prominent narrow symmetric emission lines ($v_w < 300$ km s$^{-1}$) that resulted from the photo-ionization of unshocked circumstellar material (CSM) shedded in progenitor mass loss episodes in the final weeks to months before explosion. Surprisingly, this novel display of pre-SN emission and associated mass loss occurred in a RSG progenitor with ZAMS mass of only 10-12 M$_{\odot}$, as inferred from nebular spectra. Modeling of the light curve and multi-epoch spectra with the non-LTE radiative transfer code CMFGEN and radiation-hydrodynamical (RHD) code HERACLES suggests a dense CSM limited to $r \approx 10^{15}$ cm, and mass loss rate of $10^{-2}$ M$_{\odot}$ yr$^{-1}$. The subsequent luminous light-curve plateau and persistent blue excess indicates an extended progenitor, compatible with a RSG model with $R_{\star} = 1100$ R$_{\odot}$. Inferences from the limits on the shock-powered X-ray and radio luminosity are consistent with these conclusions and suggest a CSM density of $��< 2 \times 10^{-16}$ g cm$^{-3}$ for distances of $r \approx 5 \times 10^{15}$ cm, as well as a mass loss rate of $\dot M, 36 pages, 20 figures. Accepted for publication in ApJ

Published
2021
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