A radio flare associated with the nuclear transient eRASSt J234403−352640: an outflow launched by a potential tidal disruption event
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, coincid...
| Main Authors: | , , , , , , , , , |
|---|---|
| Format: | Journal Article |
| Published: |
2024
|
| Online Access: | http://purl.org/au-research/grants/arc/DP200102471 http://hdl.handle.net/20.500.11937/94753 |
| _version_ | 1848765914086899712 |
|---|---|
| author | Goodwin, Adelle J. Anderson, Gemma Miller-Jones, James Malyali, A. Grotova, I. Homan, D. Kawka, Adela Krumpe, M. Liu, Z. Rau, A. |
| author_facet | Goodwin, Adelle J. Anderson, Gemma Miller-Jones, James Malyali, A. Grotova, I. Homan, D. Kawka, Adela Krumpe, M. Liu, Z. Rau, A. |
| author_sort | Goodwin, Adelle J. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | 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. |
| first_indexed | 2025-11-14T11:42:49Z |
| format | Journal Article |
| id | curtin-20.500.11937-94753 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T11:42:49Z |
| publishDate | 2024 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-947532024-05-24T05:54:14Z A radio flare associated with the nuclear transient eRASSt J234403−352640: an outflow launched by a potential tidal disruption event Goodwin, Adelle J. Anderson, Gemma Miller-Jones, James Malyali, A. Grotova, I. Homan, D. Kawka, Adela Krumpe, M. Liu, Z. Rau, A. 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. 2024 Journal Article http://hdl.handle.net/20.500.11937/94753 10.1093/mnras/stae362 http://purl.org/au-research/grants/arc/DP200102471 fulltext |
| spellingShingle | Goodwin, Adelle J. Anderson, Gemma Miller-Jones, James Malyali, A. Grotova, I. Homan, D. Kawka, Adela Krumpe, M. Liu, Z. Rau, A. A radio flare associated with the nuclear transient eRASSt J234403−352640: an outflow launched by a potential tidal disruption event |
| title | A radio flare associated with the nuclear transient eRASSt J234403−352640: an outflow launched by a potential tidal disruption event |
| title_full | A radio flare associated with the nuclear transient eRASSt J234403−352640: an outflow launched by a potential tidal disruption event |
| title_fullStr | A radio flare associated with the nuclear transient eRASSt J234403−352640: an outflow launched by a potential tidal disruption event |
| title_full_unstemmed | A radio flare associated with the nuclear transient eRASSt J234403−352640: an outflow launched by a potential tidal disruption event |
| title_short | A radio flare associated with the nuclear transient eRASSt J234403−352640: an outflow launched by a potential tidal disruption event |
| title_sort | radio flare associated with the nuclear transient erasst j234403−352640: an outflow launched by a potential tidal disruption event |
| url | http://purl.org/au-research/grants/arc/DP200102471 http://hdl.handle.net/20.500.11937/94753 |