Evidence for a Delayed UV Counterpart to X-ray Quasi-periodic Eruptions in Ansky
Fuente:
arXiv
Enregistré dans:
| Auteurs principaux: | , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Publié: |
2026
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866910055872331776 |
|---|---|
| author | Guo, Hengxiao Yan, Zhen Li, Ya-Ping Chakraborty, Joheen Sánchez-Sáez, Paula Hernández-García, Lorena Zhang, Wenda Sun, Jingbo Li, Shuang-liang Deng, Hongping Zuo, Wenwen Tagawa, Hiromichi Pan, Xin Zhang, Minghao Arévalo, Patricia Lira, Paulina Jin, Chichuan Gu, Minfeng |
| author_facet | Guo, Hengxiao Yan, Zhen Li, Ya-Ping Chakraborty, Joheen Sánchez-Sáez, Paula Hernández-García, Lorena Zhang, Wenda Sun, Jingbo Li, Shuang-liang Deng, Hongping Zuo, Wenwen Tagawa, Hiromichi Pan, Xin Zhang, Minghao Arévalo, Patricia Lira, Paulina Jin, Chichuan Gu, Minfeng |
| contents | X-ray quasi-periodic eruptions (QPEs) represent a novel population of extreme, repeating nuclear transients whose physical origins remain debated. A defining characteristic of QPEs has been their exclusive detection in the X-ray band, with a notable absence of correlated multi-wavelength counterparts. Here we report the first detection of a recurrent UV response temporally coupled to the X-ray QPE signal in the source Ansky/ZTF19acnskyy. The UV emission displays coherent periodic modulations over five consecutive cycles, systematically lagging the X-ray eruptions by $0.96^{+0.38}_{-0.39}$ days, with a cross-correlation coefficient of $r_{\rm max} \sim 0.6$. We suggest that the detectability of this corresponding signal may be enabled by Ansky's unusually long recurrence timescale, which could reduce the temporal smearing of the UV response seen in more rapid QPEs. The observed delay may correspond to a diffusion timescale associated with heated blobs. However, we cannot exclude the possibility that the lag corresponds to the light-crossing time associated with X-ray irradiation that originates near the central black hole and propagates to the outer UV-emitting region. While numerous QPE models have been proposed, any viable model for Ansky must be able to simultaneously explain the presence of a UV counterpart, its measured time lag, and the previously observed steadily increasing recurrence period. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_02517 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Evidence for a Delayed UV Counterpart to X-ray Quasi-periodic Eruptions in Ansky Guo, Hengxiao Yan, Zhen Li, Ya-Ping Chakraborty, Joheen Sánchez-Sáez, Paula Hernández-García, Lorena Zhang, Wenda Sun, Jingbo Li, Shuang-liang Deng, Hongping Zuo, Wenwen Tagawa, Hiromichi Pan, Xin Zhang, Minghao Arévalo, Patricia Lira, Paulina Jin, Chichuan Gu, Minfeng High Energy Astrophysical Phenomena Astrophysics of Galaxies X-ray quasi-periodic eruptions (QPEs) represent a novel population of extreme, repeating nuclear transients whose physical origins remain debated. A defining characteristic of QPEs has been their exclusive detection in the X-ray band, with a notable absence of correlated multi-wavelength counterparts. Here we report the first detection of a recurrent UV response temporally coupled to the X-ray QPE signal in the source Ansky/ZTF19acnskyy. The UV emission displays coherent periodic modulations over five consecutive cycles, systematically lagging the X-ray eruptions by $0.96^{+0.38}_{-0.39}$ days, with a cross-correlation coefficient of $r_{\rm max} \sim 0.6$. We suggest that the detectability of this corresponding signal may be enabled by Ansky's unusually long recurrence timescale, which could reduce the temporal smearing of the UV response seen in more rapid QPEs. The observed delay may correspond to a diffusion timescale associated with heated blobs. However, we cannot exclude the possibility that the lag corresponds to the light-crossing time associated with X-ray irradiation that originates near the central black hole and propagates to the outer UV-emitting region. While numerous QPE models have been proposed, any viable model for Ansky must be able to simultaneously explain the presence of a UV counterpart, its measured time lag, and the previously observed steadily increasing recurrence period. |
| title | Evidence for a Delayed UV Counterpart to X-ray Quasi-periodic Eruptions in Ansky |
| topic | High Energy Astrophysical Phenomena Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2603.02517 |