ASCA observation of ultra-luminous X-ray sources in the nearby spiral galaxy NGC 2403

Jun'ichi Kotoku, Tsunefumi Mizuno, Aya Kubota, Kazuo Makishima

研究成果: Article査読

13 被引用数 (Scopus)

抄録

The spiral galaxy NGC 2403 was observed with ASCA, and three previously known X-ray sources (sources 3, 4, and 5) were detected. Among them, the observed 0.5-10 keV flux of source 3 is 1.4 × 10-12 erg s-1 cm-2, implying a bolometric luminosity of 3.0 × 1039 erg s-1. Its spectrum can be explained by emission from an optically thick accretion disk with an inner-disk temperature of 1.1 keV. The spectrum and the high luminosity suggest that source 3 is a mass-accreting black hole binary. The observed properties of source 3 can be interpreted in terms of a black hole of mass ∼ 15 M⊙, accreting at near the Eddington rate.

本文言語English
ページ(範囲)1081-1085
ページ数5
ジャーナルPublications of the Astronomical Society of Japan
52
6
DOI
出版ステータスPublished - 2000
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

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