Spectroscopic Monitoring of the Candidate Tidal Disruption Event in F01004-2237

被引：6
|
作者：
Cannizzaro, Giacomo [1 ,2 ]
Jonker, Peter G. [1 ,2 ]
Mata-Sanchez, D. [3 ]
机构：
[1] SRON Netherlands Inst Space Res, SRON, Sorbonnelaan 2, NL-3584 CA Utrecht, Netherlands
[2] Radboud Univ Nijmegen, IMAPP, Dept Astrophys, POB 9010, NL-6500 GL Nijmegen, Netherlands
[3] Univ Manchester, Dept Phys & Astron, Jodrell Bank Ctr Astrophys, Manchester M13 9PL, Lancs, England
来源：
ASTROPHYSICAL JOURNAL | 2021年 / 909卷 / 02期
基金：
欧盟地平线“2020”;
关键词：
Tidal disruption; Active galactic nuclei; Ultraluminous infrared galaxies; Transient sources; High energy astrophysics; BROAD-LINE REGION; NEARBY; EVOLUTION; GALAXIES; OUTFLOWS; MASSES;
D O I：
10.3847/1538-4357/abe049
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present results of spectroscopic monitoring observations of the ultraluminous infrared galaxy F01004-2237. This galaxy was observed to undergo changes in its optical spectrum, detected by comparing a spectrum from 2015 with one from 2000. These changes were coincident with photometric brightening. The main changes detected in the optical spectrum are enhanced He ii lambda 4686 emission and the appearance of He i lambda 3898,lambda 5876 emission lines. The favored interpretation of these changes was that of a tidal disruption event (TDE) happening in 2010. However, subsequent work suggested that these changes are caused by another hitherto unknown effect related to variations in the accretion rate in the active galactic nucleus (AGN). Our optical spectroscopic monitoring observations show that the evolution of the He lines is in line with the evolution seen in TDEs and opposite of what is observed from reverberation-mapping studies of AGNs, renewing the discussion of the interpretation of the flare as a TDE.
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页数：8
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