2021ApJ...908L..20H

Query : 2021ApJ...908L..20H

2021ApJ...908L..20H - Astrophys. J., 908, L20-L20 (2021/February-2)

Tidal disruption event hosts are green and centrally concentrated: signatures of a post-merger system.

HAMMERSTEIN E., GEZARI S., VAN VELZEN S., CENKO S.B., ROTH N., WARD C., FREDERICK S., HUNG T., GRAHAM M., FOLEY R.J., BELLM E.C., CANNELLA C., DRAKE A.J., KUPFER T., LAHER R.R., MAHABAL A.A., MASCI F.J., RIDDLE R., ROJAS-BRAVO C. and SMITH R.

Abstract (from CDS):

We study the properties of the galaxies hosting the first 19 tidal disruption events (TDEs) detected with the Zwicky Transient Facility (ZTF) within the context of a carefully constructed, representative host galaxy sample. We find that the ZTF sample of TDE hosts is dominated by compact "green valley" galaxies. After we restrict the comparison sample to galaxies with a similar concentration, as measured by the Sersic index, we find this green valley overrepresentation is even larger. That is, concentrated red sequence galaxies are not producing TDEs at elevated levels. We present host galaxy spectra that show that E + A galaxies are overrepresented in the ZTF sample by a factor of ≃22, which is lower than previous TDE host galaxy studies have found. We find that this overrepresentation can be fully accounted for when taking into account the masses, colors, and Sersic indices of the ZTF TDE hosts. The combination of both green colors and high Sersic index of the typical TDE host galaxy could be explained if the TDE rate is temporarily enhanced following a merger that leads to a higher central concentration of stars.

Abstract Copyright: © 2021. The American Astronomical Society. All rights reserved.

Journal keyword(s): Black Hole physics - Galaxy nuclei

Simbad objects: 20

goto Full paper

goto View the references in ADS

Number of rows : 20
N Identifier Otype ICRS (2000)
RA 		ICRS (2000)
DEC 		Proper motions Parallaxes Redshift Rad. vel. cz Mag U Mag B Mag V Mag R Mag I Sp type Morph. type Angular size #ref
1983 - 2024
1 AT 2018hco Transient 01 07 33.635 +23 28 34.28 0.088 25225 26382           ~ ~ ~ ~ ~ 22
2 AT 2018lni Transient 04 09 37.652 +73 53 41.66 0.138 38540 41371           ~ ~ ~ ~ ~ 12
3 AT 2019qiz Transient 04 46 37.880 -10 13 34.92 0.0151 4493 4527           ~ ~ ~ ~ ~ 61
4 AT 2018lna Transient 07 03 18.649 +23 01 44.70 0.091 26045 27281           ~ ~ ~ ~ ~ 21
5 ATLAS 18nej Transient 07 56 54.537 +34 15 43.61 0.071 20531 21285           ~ ~ ~ ~ ~ 66
6 ASASSN -19dj Supernova 08 13 16.937 +22 38 53.80 0.022346 6624 6699.16           ~ ~ ~ ~ ~ 80
7 AT 2018bsi Transient 08 15 26.621 +45 35 31.95 0.051 14900 15289           ~ ~ ~ ~ ~ 12
8 ASASSN -18zj Supernova 10 06 50.875 +01 41 33.96 0.045815 13421 13734.99           SNII ~ ~ ~ ~ 69
9 LEDA 43234 AGN_Candidate 12 48 15.2253025968 +17 46 26.475426228 0.687 -0.362 0.163 0.02058 6106 6169.7   16.5       ~ dG ~ ~ ~ 267
10 AT 2019cho Transient 12 55 09.210 +49 31 09.93 0.193 52362 57860           ~ ~ ~ ~ ~ 12
11 AT 2020ocn Transient 13 53 53.803 +53 59 49.57 0.0705 20392 21135           ~ ~ ~ ~ ~ 15
12 AT 2019ehz Transient 14 09 41.880 +55 29 28.10 0.074 21366 22185           ~ ~ ~ ~ ~ 32
13 AT 2019bhf Transient 15 09 15.975 +16 14 22.52 0.1206 33989 36155           ~ ~ ~ ~ ~ 12
14 AT 2020pj Transient 15 31 34.960 +33 05 41.47 0.068 19694 20386           ~ ~ ~ ~ ~ 7
15 AT 2019mha Transient 16 16 27.799 +56 25 56.29 0.148 41117 44369           ~ ~ ~ ~ ~ 14
16 AT 2018iih Transient 17 28 03.930 +30 41 31.42 0.212 56942 63556           ~ ~ ~ ~ ~ 19
17 AT 2019meg Transient 18 45 16.180 +44 26 19.21 0.152 42140 45568           ~ ~ ~ ~ ~ 17
18 AT 2019teq Transient 18 59 05.5 +47 31 06 0.0874 25061 26202           ~ ~ ~ ~ ~ 8
19 AT 2019dsg Transient 20 57 02.970 +14 12 15.86 0.0512 14957 15349           ~ ~ ~ ~ ~ 99
20 AT 2019lwu Transient 23 11 12.305 -01 00 10.71 0.117 33036 35076           ~ ~ ~ ~ ~ 11

To bookmark this query, right click on this link: simbad:objects in 2021ApJ...908L..20H and select 'bookmark this link' or equivalent in the popup menu