2020ApJ...905L...5U


C.D.S. - SIMBAD4 rel 1.7 - 2021.05.15CEST23:48:53

2020ApJ...905L...5U - Astrophys. J., 905, L5-L5 (2020/December-2)

Application of the wind-driven model to a sample of tidal disruption events.

UNO K. and MAEDA K.

Abstract (from CDS):

An origin of the optical/ultraviolet (UV) radiation from tidal disruption events (TDEs) has recently been discussed for different scenarios, but observational support is generally lacking. In this Letter, we test the applicability of the "wind-driven model" for a sample of UV/optical TDEs. With the model, we aim to derive the physical properties of the optical/UV TDEs, such as mass-loss rates and characteristic radii. The model assumes optically thick continuous outflows like stellar winds, and one key question arises: how is the wind-launched radius connected to physical processes in TDEs? Here we propose one possibility: through a comparison between the escape velocities estimated from their black hole masses and the wind velocities estimated from observed line widths, the outflow is launched from the self-interaction radius (RSI) where the stellar debris stretched by the tidal force intersects. We show that the escape velocities at RSI are roughly consistent with the wind velocities. By applying the model to a sample of optical/UV TDE candidates, we find that explosive mass ejections (>=10 M yr–1) from RSI (∼1014 cm) can explain the observed properties of TDEs around peak luminosity. We also apply the same framework to a peculiar transient, AT2018cow. This model suggests that AT2018cow is likely a TDE induced by an intermediate-mass black hole (MBH ∼ 104 M).

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

Journal keyword(s): Transient sources - Tidal disruption - Stellar winds

Simbad objects: 22

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Number of rows : 22

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NAME AT 2016fnl ev 00 29 57.04 +32 53 37.5           ~ 59 0
2 NAME AT 2019qiz ev 04 46 37.880 -10 13 34.92           ~ 17 0
3 NAME AT 2019ahk ev 07 00 11.410 -66 02 25.16           ~ 18 0
4 NAME ATLAS 18nej ev 07 56 54.537 +34 15 43.61           ~ 35 0
5 ASASSN -19dj SN* 08 13 16.937 +22 38 53.80           ~ 19 0
6 PTF 15af SN* 08 48 28.13 +22 03 33.4           ~ 30 0
7 PS1-11af ev 09 57 26.815 +03 14 01.00           ~ 53 0
8 NAME AT 2018hyz ev 10 06 50.871 +01 41 34.08           ~ 17 0
9 ASASSN -14ae SN* 11 08 40.11 +34 05 52.4           ~ 76 0
10 LEDA 43234 G 12 48 15.2244073438 +17 46 26.496619532   16.5       ~ 164 0
11 PTF 09axc SN* 14 53 13.06 +22 14 32.2           SNII 37 0
12 PSN K0905-001 SN? 14 57 03.10 +49 36 40.8           ~ 57 0
13 PS1-10jh ev 16 09 28.296 +53 40 23.52           ~ 110 0
14 NAME AT 2018dyb ev 16 10 58.774 -60 55 23.16           ~ 23 0
15 SN 2018cow SN* 16 16 00.254 +22 16 05.10           SNIb 98 0
16 PTF 09djl SN* 16 33 55.94 +30 14 16.3           SNII 48 0
17 iPTF 16axa ev 17 03 34.36 +30 35 36.8           ~ 31 0
18 ASASSN -15oi SN* 20 39 09.096 -30 45 20.71           ~ 69 0
19 SN 2015L ? 22 02 15.45 -61 39 34.6           ~ 118 2
20 NAME AT 2017eqx ? 22 26 48.370 +17 08 52.40           ~ 11 0
21 NAME AT 2018bcb ev 22 43 42.90 -16 59 08.1           ~ 9 0
22 [VFG2011] TDE2 ev 23 23 48.615 -01 08 10.34           ~ 16 0

    Equat.    Gal    SGal    Ecl

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2021.05.15-23:48:53

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