| Issue |
A&A
Volume 682, February 2024
|
|
|---|---|---|
| Article Number | L14 | |
| Number of page(s) | 6 | |
| Section | Letters to the Editor | |
| DOI | https://doi.org/10.1051/0004-6361/202348613 | |
| Published online | 13 February 2024 | |
Letter to the Editor
Tidal disruption event associated with the quasi-periodic eruptions from GSN 069: Possible disruption of a common envelope
Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, PR China
e-mail: wangdi17@hust.edu.cn
Received:
15
November
2023
Accepted:
30
January
2024
Context. X-ray quasi-periodic eruptions (QPEs) from the galactic nucleus have been found in several galaxies. Among them, GSN 069 is the only one with a tidal disruption event (TDE), which was recently found to have brightened again 9 years after the main outburst.
Aims. However, the origin of this TDE is still unclear. This Letter explores a particular model for the TDE.
Methods. By comparing the fallback time with observations, we found the TDE could not be caused by the disruption of the envelope of a single star in the tidal stripping model. Thus, we suggest that it is a disruption of a common envelope (CE).
Results. By calculating the fallback rate of such a model, we reproduced the second peak in the observed TDE light curve. If this model is correct, this TDE will be the closest observation to a direct observation of CE, which has never been directly observed.
Key words: binaries: general / galaxies: active
© The Authors 2024
Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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