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 5 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
[3] Discovery of the luminous X-ray ignition eRASSt J234402.9-352640: I. Tidal disruption event or a rapid increase in accretion in an active galactic nucleus?
Homan D.
Krumpe M.
Markowitz A.
Saha T.
Gokus A.
Partington E.
Lamer G.
Malyali A.
Liu Z.
Rau A.
Grotova I.
Cackett E.M.
Buckley D.A.H.
Ciroi S.
Di Mille F.
Gendreau K.
Gromadzki M.
Krishnan S.
Schramm M.
Steiner J.F.
Astronomy and Astrophysics, 2023, 672
[4] PROBING THE STRUCTURE OF THE OUTFLOW IN THE TIDAL DISRUPTION FLARE Sw J1644+57 WITH LONG-TERM RADIO EMISSION
Cao, Di
Wang, Xiang-Yu
ASTROPHYSICAL JOURNAL, 2012, 761 (02):
[5] Archival VLBA Observations of the Cygnus A Nuclear Radio Transient (Cyg A-2) Strengthen the Tidal Disruption Event Interpretation
Tingay, Steven J.
Miller-Jones, James C. A.
Lenc, Emil
ASTROPHYSICAL JOURNAL LETTERS, 2020, 901 (01)

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