Outbursts of the black hole X-ray transient KV UMa (XTE J1118+480) in the optical band
Outbursts of the black hole X-ray transient KV UMa (XTE J1118+480) in the optical band
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光波段黑洞 X 射线瞬变 KV UMa (XTE J1118 480) 的爆发
DOI:
10.1017/pasa.2019.47
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发表时间:
2020
影响因子:
6.3
通讯作者:
Šimon, Vojtěch
中科院分区:
文献类型:
--
作者:
Šimon, Vojtěch
KV UMa (XTE J1118+480) is an X-ray binary that is known to undergo outbursts in 2000 and 2005. This paper presents the discovery of a large outburst starting in 1927 on the archival photographic plates and an analysis of the long-term optical activity of this system. We used the photographic data from DASCH (Digital Access to a Sky Century @ Harvard). We placed the 1927 outburst in the context of the observed outbursts of KV UMa. We show that it is a double event, with a precursor similar to the one of the outbursts in 2000. We find a big difference between the 1927 and 2000 outbursts as regards the length of the gap between the precursor and the main outburst. It is more than 250 d in 1927, whereas it is about 20 d in 2000, although the brightnesses of all peaks are mutually comparable. We also show that the individual optical outbursts of KV UMa differ from each other by the duration of the stage of a slow decline of brightness (sometimes roughly a plateau). This determines the length of the entire main outburst. Both the peak magnitude and the brightness of the outburst when the slow decline transitions to a steep final decaying branch plausibly reproduce in all three outbursts. In the interpretation, the short duration of the precursor is caused by the fact that only the thermal-viscous instability operated in the accretion disk while also the tidal instability of the disk contributed in the subsequent main outburst.
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DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
萩原雅人;藤原理賀;鄭旭光;河江達也;松本茂紀・渡辺宙志・島田尚・伊藤伸泰
通讯作者:
松本茂紀・渡辺宙志・島田尚・伊藤伸泰
DOI:
--
发表时间:
1976
期刊:
影响因子:
--
作者:
L. A. Eachus;E. Wright;W. Liller
通讯作者:
W. Liller
DOI:
--
发表时间:
2012
期刊:
影响因子:
--
作者:
Y. Osaki;Taichi Kato
通讯作者:
Taichi Kato
DOI:
--
发表时间:
2006
期刊:
影响因子:
--
作者:
C. Zurita;M. Torres;D.Steeghs;P. Rodríguez;T. Muñoz;J. Casares;T. Shahbaz;I. G. Martínez;P. Zhao;M. Garcia;A. Piccioni;C. Bartolini;A. Guarnieri;J. Bloom;C. Blake;E. Falco;A.Szentgyorgyi;M. I. D. A. D. Canarias;H. C. F. Astrophysics;D. Astrof́isica;U. L. Laguna;D. Astronomia;U. Bologna;A. Department;U. O. C. Berkeley;D. Astronomy;U. Virginia
通讯作者:
U. Virginia
DOI:
10.1046/j.1365-8711.1998.01295.x
发表时间:
1988
影响因子:
4.8
作者:
A. King;H. Ritter
通讯作者:
A. King;H. Ritter