A radio flare associated with the nuclear transient eRASSt J234403-352640: an outflow launched by a potential tidal disruption event

被引：2

作者：

Goodwin, A. J. ^{[1
]}

Anderson, G. E. ^{[1
]}

Miller-Jones, J. C. A. ^{[1
]}

Malyali, A. ^{[2
]}

Grotova, I ^{[2
]}

Homan, D. ^{[3
]}

Kawka, A. ^{[1
]}

Krumpe, M. ^{[3
]}

Liu, Z. ^{[2
]}

Rau, A. ^{[2
]}

机构：

[1] Curtin Univ, Int Ctr Radio Astron Res, GPO Box U1987, Perth, WA 6845, Australia

[2] Max Planck Inst Extraterr Phys, Giessenbachstr 1, D-85748 Garching, Germany

[3] Leibniz Inst Astrophys Potsdam, Sternwarte 16, 14482 Potsdam, Germany

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2024年 / 528卷 / 04期

基金：

澳大利亚研究理事会;

关键词：

radio continuum: transients; transients: tidal disruption events; keyword3; SYNCHROTRON SELF-ABSORPTION; X-RAY VARIABILITY; BLACK-HOLES; GALACTIC NUCLEI; EMISSION; OUTBURSTS; MODELS; AGN; MILLIMETER; GALAXIES;

D O I：

10.1093/mnras/stae362

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present an extensive radio monitoring campaign of the nuclear transient eRASSt J234402.9-352640 with the Australia Telescope Compact Array, one of the most X-ray luminous TDE candidates discovered by the SRG/eROSITA all-sky survey. The observations reveal a radio flare lasting >1000 d, coincident with the X-ray, UV, optical, and infrared flare of this transient event. Through modelling of the 10 epochs of radio spectral observations obtained, we find that the radio emission is well-described by an expanding synchrotron emitting region, consisting of a single ejection of material launched coincident with the optical flare. We conclude that the radio flare properties of eRASSt J234402.9-352640 are consistent with the population of radio-emitting outflows launched by non-relativistic tidal disruption events, and that the flare is likely due to an outflow launched by a tidal disruption event (but could also be a due to a new AGN accretion event) in a previously turned-off AGN.

引用

页码：7123 / 7136

页数：14

共 2 条

[1] A Second Radio Flare from the Tidal Disruption Event AT2020vwl: A Delayed Outflow Ejection?
Goodwin, A. J.
Mummery, A.
Laskar, T.
Alexander, K. D.
Anderson, G. E.
Bietenholz, M.
Bonnerot, C.
Christy, C. T.
Golay, W.
Lu, W.
Margutti, R.
Miller-Jones, J. C. A.
Ramirez-Ruiz, E.
Saxton, R.
van Velzen, S.
ASTROPHYSICAL JOURNAL, 2025, 981 (02)
[2] Deciphering the extreme X-ray variability of the nuclear transient eRASSt J045650.3-203750 A likely repeating partial tidal disruption event
Liu, Z.
Malyali, A.
Krumpe, M.
Homan, D.
Goodwin, A. J.
Grotova, I.
Kawka, A.
Rau, A.
Merloni, A.
Anderson, G. E.
Miller-Jones, J. C. A.
Markowitz, A. G.
Ciroi, S.
Di Mille, F.
Schramm, M.
Tang, S.
Buckley, D. A. H.
Gromadzki, M.
Jin, C.
Buchner, J.
ASTRONOMY & ASTROPHYSICS, 2023, 669

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