A possible x-ray periodicity at several tens of hours of an ultraluminous compact x-ray source in IC 342

M. Sugiho, J. Kotoku, K. Makishima, A. Kubota, T. Mizuno, Y. Fukazawa, M. Tashiro

研究成果: Article査読

31 被引用数 (Scopus)

抄録

A long (155 hr) ASCA observation was performed of two ultraluminous compact X-ray sources, source 1 and source 2, in the spiral galaxy IC 342. While source 1, which was in a hard spectral state, varied little, source 2, which was in its soft spectral state, varied significantly on a timescale of about 1 day. The rms variation amplitude amounts to 5% in the 2-10 keV band but is less than 4% in 0.7-2 keV. The variation involves statistically significant changes in the parameters describing multicolor disk blackbody emission from this source. The variation is possibly periodic, with a period of either 31 ± 2 or 41 ± 3 hr. Both are consistent with the orbital period of a semidetached binary formed by a black hole and a main-sequence star of several tens of solar masses. These results reinforce the interpretation of these X-ray objects in terms of accreting massive stellar black holes.

本文言語English
ページ(範囲)L73-L76
ジャーナルAstrophysical Journal
561
1 PART 2
DOI
出版ステータスPublished - 2001 11 1
外部発表はい

ASJC Scopus subject areas

  • 天文学と天体物理学
  • 宇宙惑星科学

フィンガープリント

「A possible x-ray periodicity at several tens of hours of an ultraluminous compact x-ray source in IC 342」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル