Spectral evolution of an ultraluminous compact X-ray source in NGC 253

Takaaki Tanaka; Masahiko Sugiho; Aya Kubota; Kazuo Makishima; Tadayuki Takahashi

doi:10.1143/PTPS.155.427

Spectral evolution of an ultraluminous compact X-ray source in NGC 253

Takaaki Tanaka, Masahiko Sugiho, Aya Kubota, Kazuo Makishima, Tadayuki Takahashi

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

Abstract

We report an observational result for a ULX in NGC253. We find that the spectral evolution is well consistent with the standard behavior. That is, the source satisfies the relation L_disk ∝ T_in ⁴ as established for black hole binaries. By comparing with black hole binaries, we estimate black hole mass of this ULX as 7M⊙.

Original language	English
Pages (from-to)	427-428
Number of pages	2
Journal	Progress of Theoretical Physics Supplement
Volume	155
DOIs	https://doi.org/10.1143/PTPS.155.427
Publication status	Published - 2004
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Spectral evolution of an ultraluminous compact X-ray source in NGC 253",

abstract = "We report an observational result for a ULX in NGC253. We find that the spectral evolution is well consistent with the standard behavior. That is, the source satisfies the relation Ldisk ∝ Tin 4 as established for black hole binaries. By comparing with black hole binaries, we estimate black hole mass of this ULX as 7M⊙.",

author = "Takaaki Tanaka and Masahiko Sugiho and Aya Kubota and Kazuo Makishima and Tadayuki Takahashi",

year = "2004",

doi = "10.1143/PTPS.155.427",

language = "English",

volume = "155",

pages = "427--428",

journal = "Progress of Theoretical Physics Supplement",

issn = "0375-9687",

publisher = "Yukawa Institute for Theoretical Physics",

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T1 - Spectral evolution of an ultraluminous compact X-ray source in NGC 253

AU - Tanaka, Takaaki

AU - Sugiho, Masahiko

AU - Kubota, Aya

AU - Makishima, Kazuo

AU - Takahashi, Tadayuki

PY - 2004

Y1 - 2004

N2 - We report an observational result for a ULX in NGC253. We find that the spectral evolution is well consistent with the standard behavior. That is, the source satisfies the relation Ldisk ∝ Tin 4 as established for black hole binaries. By comparing with black hole binaries, we estimate black hole mass of this ULX as 7M⊙.

AB - We report an observational result for a ULX in NGC253. We find that the spectral evolution is well consistent with the standard behavior. That is, the source satisfies the relation Ldisk ∝ Tin 4 as established for black hole binaries. By comparing with black hole binaries, we estimate black hole mass of this ULX as 7M⊙.

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DO - 10.1143/PTPS.155.427

M3 - Article

AN - SCOPUS:11044230657

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EP - 428

JO - Progress of Theoretical Physics Supplement

JF - Progress of Theoretical Physics Supplement

ER -

Spectral evolution of an ultraluminous compact X-ray source in NGC 253

Abstract

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