2020ApJ...888L..14C

Query : 2020ApJ...888L..14C

2020ApJ...888L..14C - Astrophys. J., 888, L14-L14 (2020/January-1)

On post-starburst galaxies dominating tidal disruption events.

CEN R.

Abstract (from CDS):

A starburst induced by a galaxy merger may create a relatively thin central stellar disk at radius <=100 pc. We calculate the rate of tidal disruption events (TDEs) by the inspiraling secondary supermassive black hole (SMBH) through the disk. With a small enough stellar velocity dispersion (σ/vc≤ 0.1) in the disk, it is shown that 105-106 TDEs of solar-type main-sequence stars per post-starburst galaxy (PSB) can be produced to explain their dominance in producing observed TDEs. Although the time it takes to bring the secondary SMBH to the disk apparently varies in the range of ∼0.1-1 Gyr since the starburst, depending on its landing location and subsequently due to dynamical friction with stars exterior to the central stellar disk in question, the vast majority of TDEs by the secondary SMBH in any individual PSB occur within a time span shorter than ∼30 Myr. Five unique testable predictions of this model are suggested.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): Dynamical friction - Supermassive black holes - Galaxy mergers - Galaxy stellar disks - Tidal disruption

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 ASASSN -15lh ev 22 02 15.4 -61 39 34           ~ 187 1

Query : 2020ApJ...888L..14C

Basic data :
ASASSN -15lh -- Transient Event
Other object types: otypes_help 		SN* (SN), ev (2008yCat)
ICRS coord. (ep=J2000) : 		22 02 15.4 -61 39 34 (Optical) [ ] D 2008yCat....1.2024B
FK4 coord. (ep=B1950 eq=1950) : 		21 58 39.6 -61 54 03 [ ]
Gal coord. (ep=J2000) : 		330.0719 -45.5481 [ ]
Radial velocity / Redshift / cz : 		V(km/s) 61796 [~] / z(~) 0.2326 [~] / cz 69732 [~]
   D 2018A&A...611A..45R
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ASASSN -15lh SN 2015lh SN 2015L

References (187 between 1850 and 2026) (Total 187)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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