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1. The Final Season Reimagined: 30 Tidal Disruption Events from the ZTF-I Survey

Author

Erica Hammerstein, Sjoert van Velzen, Suvi Gezari, S. Bradley Cenko, Yuhan Yao, Charlotte Ward, Sara Frederick, Natalia Villanueva, Jean J. Somalwar, Matthew J. Graham, Shrinivas R. Kulkarni, Daniel Stern, Igor Andreoni, Eric C. Bellm, Richard Dekany, Suhail Dhawan, Andrew J. Drake, Christoffer Fremling, Pradip Gatkine, Steven L. Groom, Anna Y. Q. Ho, Mansi M. Kasliwal, Viraj Karambelkar, Erik C. Kool, Frank J. Masci, Michael S. Medford, Daniel A. Perley, Josiah Purdum, Jan van Roestel, Yashvi Sharma, Jesper Sollerman, Kirsty Taggart, Lin Yan, Hammerstein, E [0000-0002-5698-8703], van Velzen, S [0000-0002-3859-8074], Gezari, S [0000-0003-3703-5154], Cenko, SB [0000-0003-1673-970X], Yao, Y [0000-0001-6747-8509], Ward, C [0000-0002-4557-6682], Frederick, S [0000-0001-9676-730X], Villanueva, N [0000-0001-6917-4656], Somalwar, JJ [0000-0001-8426-5732], Graham, MJ [0000-0002-3168-0139], Kulkarni, SR [0000-0001-5390-8563], Stern, D [0000-0003-2686-9241], Andreoni, I [0000-0002-8977-1498], Bellm, EC [0000-0001-8018-5348], Dekany, R [0000-0002-5884-7867], Dhawan, S [0000-0002-2376-6979], Drake, AJ [0000-0003-0228-6594], Fremling, C [0000-0002-4223-103X], Gatkine, P [0000-0002-1955-2230], Groom, SL [0000-0001-5668-3507], Ho, AYQ [0000-0002-9017-3567], Kasliwal, MM [0000-0002-5619-4938], Karambelkar, V [0000-0003-2758-159X], Kool, EC [0000-0002-7252-3877], Masci, FJ [0000-0002-8532-9395], Medford, MS [0000-0002-7226-0659], Perley, DA [0000-0001-8472-1996], Purdum, J [0000-0003-1227-3738], van Roestel, J [0000-0002-2626-2872], Sharma, Y [0000-0003-4531-1745], Sollerman, J [0000-0003-1546-6615], Taggart, K [0000-0002-5748-4558], Yan, L [0000-0003-1710-9339], and Apollo - University of Cambridge Repository

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Space and Planetary Science, 5101 Astronomical Sciences, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, 51 Physical Sciences, High-Energy Phenomena and Fundamental Physics, Astrophysics::Galaxy Astrophysics
Abstract

Tidal disruption events (TDEs) offer a unique way to study dormant black holes. While the number of observed TDEs has grown thanks to the emergence of wide-field surveys in the past few decades, questions regarding the nature of the observed optical, UV, and X-ray emission remain. We present a uniformly selected sample of 30 spectroscopically classified TDEs from the Zwicky Transient Facility Phase I survey operations with follow-up \textit{Swift} UV and X-ray observations. Through our investigation into correlations between light curve properties, we recover a shallow positive correlation between the peak bolometric luminosity and decay timescales. We introduce a new spectroscopic class of TDE, TDE-featureless, which are characterized by featureless optical spectra. The new TDE-featureless class shows larger peak bolometric luminosities, peak blackbody temperatures, and peak blackbody radii. We examine the differences between the X-ray bright and X-ray faint populations of TDEs in this sample, finding that X-ray bright TDEs show higher peak blackbody luminosities than the X-ray faint sub-sample. This sample of optically selected TDEs is the largest sample of TDEs from a single survey yet, and the systematic discovery, classification, and follow-up of this sample allows for robust characterization of TDE properties, an important stepping stone looking forward toward the Rubin era., Comment: 44 pages, 22 figures, 9 tables, accepted to ApJ

Published
2023
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2. Publisher Correction: A very luminous jet from the disruption of a star by a massive black hole.

Author

Andreoni I, Coughlin MW, Perley DA, Yao Y, Lu W, Cenko SB, Kumar H, Anand S, Ho AYQ, Kasliwal MM, de Ugarte Postigo A, Sagués-Carracedo A, Schulze S, Kann DA, Kulkarni SR, Sollerman J, Tanvir N, Rest A, Izzo L, Somalwar JJ, Kaplan DL, Ahumada T, Anupama GC, Auchettl K, Barway S, Bellm EC, Bhalerao V, Bloom JS, Bremer M, Bulla M, Burns E, Campana S, Chandra P, Charalampopoulos P, Cooke J, D'Elia V, Das KK, Dobie D, Fernández JFA, Freeburn J, Fremling C, Gezari S, Goode S, Graham MJ, Hammerstein E, Karambelkar VR, Kilpatrick CD, Kool EC, Krips M, Laher RR, Leloudas G, Levan A, Lundquist MJ, Mahabal AA, Medford MS, Miller MC, Möller A, Mooley KP, Nayana AJ, Nir G, Pang PTH, Paraskeva E, Perley RA, Petitpas G, Pursiainen M, Ravi V, Ridden-Harper R, Riddle R, Rigault M, Rodriguez AC, Rusholme B, Sharma Y, Smith IA, Stein RD, Thöne C, Tohuvavohu A, Valdes F, van Roestel J, Vergani SD, Wang Q, and Zhang J

Published
2023
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3. A very luminous jet from the disruption of a star by a massive black hole.

Author

Andreoni I, Coughlin MW, Perley DA, Yao Y, Lu W, Cenko SB, Kumar H, Anand S, Ho AYQ, Kasliwal MM, de Ugarte Postigo A, Sagués-Carracedo A, Schulze S, Kann DA, Kulkarni SR, Sollerman J, Tanvir N, Rest A, Izzo L, Somalwar JJ, Kaplan DL, Ahumada T, Anupama GC, Auchettl K, Barway S, Bellm EC, Bhalerao V, Bloom JS, Bremer M, Bulla M, Burns E, Campana S, Chandra P, Charalampopoulos P, Cooke J, D'Elia V, Das KK, Dobie D, Fernández JFA, Freeburn J, Fremling C, Gezari S, Goode S, Graham MJ, Hammerstein E, Karambelkar VR, Kilpatrick CD, Kool EC, Krips M, Laher RR, Leloudas G, Levan A, Lundquist MJ, Mahabal AA, Medford MS, Miller MC, Möller A, Mooley KP, Nayana AJ, Nir G, Pang PTH, Paraskeva E, Perley RA, Petitpas G, Pursiainen M, Ravi V, Ridden-Harper R, Riddle R, Rigault M, Rodriguez AC, Rusholme B, Sharma Y, Smith IA, Stein RD, Thöne C, Tohuvavohu A, Valdes F, van Roestel J, Vergani SD, Wang Q, and Zhang J

Abstract

Tidal disruption events (TDEs) are bursts of electromagnetic energy that are released when supermassive black holes at the centres of galaxies violently disrupt a star that passes too close 1 . TDEs provide a window through which to study accretion onto supermassive black holes; in some rare cases, this accretion leads to launching of a relativistic jet 2-9 , but the necessary conditions are not fully understood. The best-studied jetted TDE so far is Swift J1644+57, which was discovered in γ-rays, but was too obscured by dust to be seen at optical wavelengths. Here we report the optical detection of AT2022cmc, a rapidly fading source at cosmological distance (redshift z = 1.19325) the unique light curve of which transitioned into a luminous plateau within days. Observations of a bright counterpart at other wavelengths, including X-ray, submillimetre and radio, supports the interpretation of AT2022cmc as a jetted TDE containing a synchrotron 'afterglow', probably launched by a supermassive black hole with spin greater than approximately 0.3. Using four years of Zwicky Transient Facility 10 survey data, we calculate a rate of [Formula: see text] per gigapascals cubed per year for on-axis jetted TDEs on the basis of the luminous, fast-fading red component, thus providing a measurement complementary to the rates derived from X-ray and radio observations 11 . Correcting for the beaming angle effects, this rate confirms that approximately 1 per cent of TDEs have relativistic jets. Optical surveys can use AT2022cmc as a prototype to unveil a population of jetted TDEs., (© 2022. The Author(s), under exclusive licence to Springer Nature Limited.)

Published
2022
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