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

Hammerstein, Erica and van Velzen, Sjoert and Gezari, Suvi and Cenko, S. Bradley and Yao, Yuhan and Ward, Charlotte and Frederick, Sara and Villanueva, Natalia and Somalwar, Jean J. and Graham, Matthew J. and Kulkarni, Shrinivas R. and Stern, Daniel and Bellm, Eric C. and Dekany, Richard and Drake, Andrew J. and Groom, Steven L. and Kasliwal, Mansi M. and Kool, Erik C. and Masci, Frank J. and Medford, Michael S. and van Roestel, Jan (2022) The Final Season Reimagined: 30 Tidal Disruption Events from the ZTF-I Survey. . (Unpublished)

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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 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. We recover a difference between the light curve timescales of the four TDE classes, with TDE-H+He having longer rise times. 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 longer decay timescales than the X-ray faint sub-sample. We present a scheme for classifying the shapes of the optical light curves, finding that TDEs with "structured" light curves have significantly less massive host galaxies than other types of TDEs. 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.

Item Type:Report or Paper (Discussion Paper)
Related URLs:
URLURL TypeDescription Paper ItemJournal Article
Hammerstein, Erica0000-0002-5698-8703
van Velzen, Sjoert0000-0002-3859-8074
Gezari, Suvi0000-0003-3703-5154
Cenko, S. Bradley0000-0003-1673-970X
Yao, Yuhan0000-0001-6747-8509
Ward, Charlotte0000-0002-4557-6682
Frederick, Sara0000-0001-9676-730X
Somalwar, Jean J.0000-0001-8426-5732
Graham, Matthew J.0000-0002-3168-0139
Kulkarni, Shrinivas R.0000-0001-5390-8563
Stern, Daniel0000-0003-2686-9241
Bellm, Eric C.0000-0001-8018-5348
Dekany, Richard0000-0002-5884-7867
Groom, Steven L.0000-0001-5668-3507
Kasliwal, Mansi M.0000-0002-5619-4938
Kool, Erik C.0000-0002-7252-3877
Masci, Frank J.0000-0002-8532-9395
Medford, Michael S.0000-0002-7226-0659
van Roestel, Jan0000-0002-2626-2872
Additional Information:Based on observations obtained with the Samuel Oschin Telescope 48-inch and the 60-inch Telescope at the Palomar Observatory as part of the Zwicky Transient Facility project. ZTF is supported by the National Science Foundation under Grant No. AST-1440341 and a collaboration including Caltech, IPAC, the Weizmann Institute for Science, the Oskar Klein Center at Stockholm University, the University of Maryland, the University of Washington, Deutsches Elektronen-Synchrotron and Humboldt University, Los Alamos National Laboratories, the TANGO Consortium of Taiwan, the University of Wisconsin at Milwaukee, and Lawrence Berkeley National Laboratories. Operations are conducted by COO, IPAC, and UW. The ZTF forced-photometry service was funded under the Heising-Simons Foundation grant #12540303 (PI: Graham). This work was supported by the GROWTH project funded by the National Science Foundation under Grant No 1545949. ECK acknowledges support from the G.R.E.A.T research environment funded by Vetenskapsrådet, the Swedish Research Council, under project number 2016-06012, and support from The Wenner-Gren Foundations.
Group:Astronomy Department, Infrared Processing and Analysis Center (IPAC), Zwicky Transient Facility, Division of Geological and Planetary Sciences
Funding AgencyGrant Number
ZTF partner institutionsUNSPECIFIED
Heising-Simons Foundation12540303
Swedish Research Council2016-06012
Wenner-Gren FoundationUNSPECIFIED
Record Number:CaltechAUTHORS:20220526-173258641
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:114941
Deposited By: George Porter
Deposited On:31 May 2022 15:52
Last Modified:10 Feb 2023 19:15

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