Hammerstein, E, van Velzen, S, Gezari, S, Cenko, SB, Yao, Y, Ward, C, Frederick, S, Villanueva, N, Somalwar, JJ, Graham, MJ, Kulkarni, SR, Stern, D, Andreoni, I, Bellm, EC, Dekany, R, Dhawan, S, Drake, AJ, Fremling, C, Gatkine, P, Groom, SL et al, Ho, AYQ, Kasliwal, MM, Karambelkar, V, Kool, EC, Masci, FJ, Medford, MS, Perley, DA, Purdum, J, Roestel, JV, Sharma, Y, Sollerman, J, Taggart, K and Yan, L (2022) The Final Season Reimagined: 30 Tidal Disruption Events from the ZTF-I Survey. Astrophysical Journal, 942 (1). ISSN 1538-4357

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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 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 subsample. 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:	Article
Uncontrolled Keywords:	0201 Astronomical and Space Sciences; 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics; 0306 Physical Chemistry (incl. Structural); Astronomy & Astrophysics
Subjects:	Q Science > QB Astronomy Q Science > QC Physics
Divisions:	Astrophysics Research Institute
Publisher:	American Astornomical Society and IOP Publishing
SWORD Depositor:	A Symplectic
Date Deposited:	15 Mar 2023 13:26
Last Modified:	15 Mar 2023 13:30
DOI or Identification number:	10.3847/1538-4357/aca283
URI:	https://researchonline.ljmu.ac.uk/id/eprint/19098

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