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

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

doi:10.1093/pasj/52.6.1081

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

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

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	1081-1085
Number of pages	5
Journal	Publications of the Astronomical Society of Japan
Volume	52
Issue number	6
DOIs	https://doi.org/10.1093/pasj/52.6.1081
Publication status	Published - 2000
Externally published	Yes

Keywords

Black hole physics
Galaxies: individual (NGC 2403)
Galaxies: spiral
X-rays: galaxies

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1093/pasj/52.6.1081

Cite this

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

abstract = "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.",

keywords = "Black hole physics, Galaxies: individual (NGC 2403), Galaxies: spiral, X-rays: galaxies",

author = "Jun'ichi Kotoku and Tsunefumi Mizuno and Aya Kubota and Kazuo Makishima",

year = "2000",

doi = "10.1093/pasj/52.6.1081",

language = "English",

volume = "52",

pages = "1081--1085",

journal = "Publication of the Astronomical Society of Japan",

issn = "0004-6264",

publisher = "Astronomical Society of Japan",

number = "6",

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TY - JOUR

T1 - ASCA observation of ultra-luminous X-ray sources in the nearby spiral galaxy NGC 2403

AU - Kotoku, Jun'ichi

AU - Mizuno, Tsunefumi

AU - Kubota, Aya

AU - Makishima, Kazuo

PY - 2000

Y1 - 2000

N2 - 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.

AB - 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.

KW - Black hole physics

KW - Galaxies: individual (NGC 2403)

KW - Galaxies: spiral

KW - X-rays: galaxies

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JF - Publication of the Astronomical Society of Japan

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

Abstract

Keywords

ASJC Scopus subject areas

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