| GUOLO, Muryel, Dheeraj R. PASHAM, Michal ZAJAČEK, Eric R. COUGHLIN, Suvi GEZARI, Petra SUKOVÁ, Thomas WEVERS, Vojtech WITZANY, Francesco TOMBESI, Sjoert VAN VELZEN, Kate D. ALEXANDER, Yuhan YAO, Riccardo ARCODIA, Vladimír KARAS, James C. A. MILLER-JONES, Ronald REMILLARD, Keith GENDREAU and Elizabeth C. FERRARA. X-ray eruptions every 22 days from the nucleus of a nearby galaxy. Nature Astronomy. Nature Publishing Group, 2024, vol. 8, No 3, p. 347-358. ISSN 2397-3366. Available from: https://dx.doi.org/10.1038/s41550-023-02178-4. |
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@article{2385308,
author = {Guolo, Muryel and Pasham, Dheeraj R. and Zajaček, Michal and Coughlin, Eric R. and Gezari, Suvi and Suková, Petra and Wevers, Thomas and Witzany, Vojtech and Tombesi, Francesco and van Velzen, Sjoert and Alexander, Kate D. and Yao, Yuhan and Arcodia, Riccardo and Karas, Vladimír and MillerandJones, James C. A. and Remillard, Ronald and Gendreau, Keith and Ferrara, Elizabeth C.},
article_number = {3},
doi = {http://dx.doi.org/10.1038/s41550-023-02178-4},
keywords = {High-energy astrophysics; Time-domain astronomy; Transient astrophysical phenomena},
language = {eng},
issn = {2397-3366},
journal = {Nature Astronomy},
title = {X-ray eruptions every 22 days from the nucleus of a nearby galaxy},
url = {https://www.nature.com/articles/s41550-023-02178-4},
volume = {8},
year = {2024}
}
TY - JOUR
ID - 2385308
AU - Guolo, Muryel - Pasham, Dheeraj R. - Zajaček, Michal - Coughlin, Eric R. - Gezari, Suvi - Suková, Petra - Wevers, Thomas - Witzany, Vojtech - Tombesi, Francesco - van Velzen, Sjoert - Alexander, Kate D. - Yao, Yuhan - Arcodia, Riccardo - Karas, Vladimír - Miller-Jones, James C. A. - Remillard, Ronald - Gendreau, Keith - Ferrara, Elizabeth C.
PY - 2024
TI - X-ray eruptions every 22 days from the nucleus of a nearby galaxy
JF - Nature Astronomy
VL - 8
IS - 3
SP - 347-358
EP - 347-358
PB - Nature Publishing Group
SN - 23973366
KW - High-energy astrophysics
KW - Time-domain astronomy
KW - Transient astrophysical phenomena
UR - https://www.nature.com/articles/s41550-023-02178-4
N2 - Galactic nuclei showing recurrent phases of activity and quiescence have recently been discovered. Some have recurrence times as short as a few hours to a day and are known as quasi-periodic X-ray eruption (QPE) sources. Others have recurrence times as long as hundreds to a thousand days and are called repeating nuclear transients. Here we present a multiwavelength overview of Swift J023017.0+283603 (hereafter Swift J0230+28), a source from which repeating and quasi-periodic X-ray flares are emitted from the nucleus of a previously unremarkable galaxy at similar to 165 Mpc. It has a recurrence time of approximately 22 days, an intermediary timescale between known repeating nuclear transients and QPE sources. The source also shows transient radio emission, likely associated with the X-ray emission. Such recurrent soft X-ray eruptions, with no accompanying ultraviolet or optical emission, are strikingly similar to QPE sources. However, in addition to having a recurrence time that is similar to 25 times longer than the longest-known QPE source, Swift J0230+28's eruptions exhibit somewhat distinct shapes and temperature evolution compared to the known QPE sources. Scenarios involving extreme mass ratio inspirals are favoured over disk instability models. The source reveals an unexplored timescale for repeating extragalactic transients and highlights the need for a wide-field, time-domain X-ray mission to explore the parameter space of recurring X-ray transients.
ER -
GUOLO, Muryel, Dheeraj R. PASHAM, Michal ZAJAČEK, Eric R. COUGHLIN, Suvi GEZARI, Petra SUKOVÁ, Thomas WEVERS, Vojtech WITZANY, Francesco TOMBESI, Sjoert VAN VELZEN, Kate D. ALEXANDER, Yuhan YAO, Riccardo ARCODIA, Vladimír KARAS, James C. A. MILLER-JONES, Ronald REMILLARD, Keith GENDREAU and Elizabeth C. FERRARA. X-ray eruptions every 22 days from the nucleus of a nearby galaxy. \textit{Nature Astronomy}. Nature Publishing Group, 2024, vol.~8, No~3, p.~347-358. ISSN~2397-3366. Available from: https://dx.doi.org/10.1038/s41550-023-02178-4.
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