J 2024

X-ray eruptions every 22 days from the nucleus of a nearby galaxy

GUOLO, Muryel, Dheeraj R. PASHAM, Michal ZAJAČEK, Eric R. COUGHLIN, Suvi GEZARI et. al.

Basic information

Original name

X-ray eruptions every 22 days from the nucleus of a nearby galaxy

Authors

GUOLO, Muryel (guarantor), Dheeraj R. PASHAM, Michal ZAJAČEK (703 Slovakia, belonging to the institution), Eric R. COUGHLIN, Suvi GEZARI, Petra SUKOVÁ (203 Czech Republic), 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

Edition

Nature Astronomy, Nature Publishing Group, 2024, 2397-3366

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10308 Astronomy

Country of publisher

Germany

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

Impact factor

Impact factor: 14.100 in 2022

Organization unit

Faculty of Science

UT WoS

001141914300001

Keywords in English

High-energy astrophysics; Time-domain astronomy; Transient astrophysical phenomena

Tags

Tags

International impact, Reviewed
Změněno: 16/4/2024 11:13, Mgr. Marie Šípková, DiS.

Abstract

V originále

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.

Links

GM24-10599M, research and development project
Name: Hvězdy v galaktických jádrech: vzájemný vztah s masivními černými dírami
Investor: Czech Science Foundation, Stars in galactic nuclei: interrelation with massive black holes