A spectral study of the black hole candidate XTE J1752-223 in the high/soft state with MAXI, Suzaku, and Swift

Satoshi Nakahira, Shu Koyama, Yoshihiro Ueda, Kazutaka Yamaoka, Mutsumi Sugizaki, Tatehiro Mihara, Masaru Matsuoka, Atsumasa Yoshida, Kazuo Makishima, Ken Ebisawa, Aya Kubota, Shin'ya Yamada, Hitoshi Negoro, Kazuo Hiroi, Masaki Ishikawa, Nobuyuki Kawai, Masashi Kimura, Hiroki Kitayama, Mitsuhiro Kohama, Takanori MatsumuraMikio Morii, Motoki Nakajima, Motoko Serino, Megumi Shidatsu, Tetsuya Sootome, Kousuke Sugimori, Fumitoshi Suwa, Hiroshi Tomida, Yoko Tsuboi, Hiroshi Tsunemi, Shiro Ueno, Ryuichi Usui, Takayuki Yamamoto, Kyohei Yamazaki, Makoto S. Tashiro, Yukikatsu Terada, Hiromi Seta

研究成果: Article

抄録

We report on an X-ray spectral analysis of the black hole candidate XTE J1752-223 in the 2009-2010 outburst, utilizing data obtained with the MAXI/Gas Slit Camera (GSC), the Swift/XRT, and Suzaku, which work comple-mentarily. As already reported by Nakahira et al. (2010, PASJ, 62, L27), MAXI monitored the source continuously throughout the entire outburst for about eight months. All of the MAXI/GSC energy spectra in the high/soft state, lasting for 2 months, are well represented by a multi-color disk plus power-law model. The innermost disk temperature changed from ∼0.7 keV to ∼0.4 keV and the disk flux decreased by an order of magnitude. Nevertheless, the innermost radius is constant at ∼41 D 3.5(cos i) -1/2km, where D 3.5 is the source distance in units of 3.5kpc and i the inclination. The multi-color disk parameters obtained with the MAXI/GSC are consistent with those with the Swift/XRT and Suzaku. The Suzaku data also suggest a possibility that the disk emission is slightly Comptonized, which could account for broad iron-K features reported previously. Assuming that the obtained innermost radius represents the innermost stable circular orbit for a non-rotating black hole, we estimate the mass of the black hole to be 5.51 ± 0.28 M D 3.5(cos -1/2, where the correction for the stress-free inner boundary condition and color hardening factor of 1.7 are taken into account. If the inclination is less than 49°, as suggested from radio monitoring of transient jets, and the soft-to-hard transition in 2010 April occurred at 1%-4% of Eddignton luminosity, the fitting of the Suzaku spectra with a relativistic accretion-disk model derives constraints on the mass and the distance to be 3.1-55M and 2.3-22 kpc, respectively. This confirms that the compact object in XTE J1752-223 is a black hole.

元の言語English
ジャーナルPublications of the Astronomical Society of Japan
64
発行部数1
出版物ステータスPublished - 2012 2 25

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outburst
slits
gas
cameras
color
inclination
hardening
spectral analysis
gases
power law
boundary condition
accretion
radii
radio
circular orbits
iron
accretion disks
spectrum analysis
monitoring
energy spectra

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

これを引用

Nakahira, S., Koyama, S., Ueda, Y., Yamaoka, K., Sugizaki, M., Mihara, T., ... Seta, H. (2012). A spectral study of the black hole candidate XTE J1752-223 in the high/soft state with MAXI, Suzaku, and Swift. Publications of the Astronomical Society of Japan, 64(1).

A spectral study of the black hole candidate XTE J1752-223 in the high/soft state with MAXI, Suzaku, and Swift. / Nakahira, Satoshi; Koyama, Shu; Ueda, Yoshihiro; Yamaoka, Kazutaka; Sugizaki, Mutsumi; Mihara, Tatehiro; Matsuoka, Masaru; Yoshida, Atsumasa; Makishima, Kazuo; Ebisawa, Ken; Kubota, Aya; Yamada, Shin'ya; Negoro, Hitoshi; Hiroi, Kazuo; Ishikawa, Masaki; Kawai, Nobuyuki; Kimura, Masashi; Kitayama, Hiroki; Kohama, Mitsuhiro; Matsumura, Takanori; Morii, Mikio; Nakajima, Motoki; Serino, Motoko; Shidatsu, Megumi; Sootome, Tetsuya; Sugimori, Kousuke; Suwa, Fumitoshi; Tomida, Hiroshi; Tsuboi, Yoko; Tsunemi, Hiroshi; Ueno, Shiro; Usui, Ryuichi; Yamamoto, Takayuki; Yamazaki, Kyohei; Tashiro, Makoto S.; Terada, Yukikatsu; Seta, Hiromi.

:: Publications of the Astronomical Society of Japan, 巻 64, 番号 1, 25.02.2012.

研究成果: Article

Nakahira, S, Koyama, S, Ueda, Y, Yamaoka, K, Sugizaki, M, Mihara, T, Matsuoka, M, Yoshida, A, Makishima, K, Ebisawa, K, Kubota, A, Yamada, S, Negoro, H, Hiroi, K, Ishikawa, M, Kawai, N, Kimura, M, Kitayama, H, Kohama, M, Matsumura, T, Morii, M, Nakajima, M, Serino, M, Shidatsu, M, Sootome, T, Sugimori, K, Suwa, F, Tomida, H, Tsuboi, Y, Tsunemi, H, Ueno, S, Usui, R, Yamamoto, T, Yamazaki, K, Tashiro, MS, Terada, Y & Seta, H 2012, 'A spectral study of the black hole candidate XTE J1752-223 in the high/soft state with MAXI, Suzaku, and Swift', Publications of the Astronomical Society of Japan, 巻. 64, 番号 1.
Nakahira, Satoshi ; Koyama, Shu ; Ueda, Yoshihiro ; Yamaoka, Kazutaka ; Sugizaki, Mutsumi ; Mihara, Tatehiro ; Matsuoka, Masaru ; Yoshida, Atsumasa ; Makishima, Kazuo ; Ebisawa, Ken ; Kubota, Aya ; Yamada, Shin'ya ; Negoro, Hitoshi ; Hiroi, Kazuo ; Ishikawa, Masaki ; Kawai, Nobuyuki ; Kimura, Masashi ; Kitayama, Hiroki ; Kohama, Mitsuhiro ; Matsumura, Takanori ; Morii, Mikio ; Nakajima, Motoki ; Serino, Motoko ; Shidatsu, Megumi ; Sootome, Tetsuya ; Sugimori, Kousuke ; Suwa, Fumitoshi ; Tomida, Hiroshi ; Tsuboi, Yoko ; Tsunemi, Hiroshi ; Ueno, Shiro ; Usui, Ryuichi ; Yamamoto, Takayuki ; Yamazaki, Kyohei ; Tashiro, Makoto S. ; Terada, Yukikatsu ; Seta, Hiromi. / A spectral study of the black hole candidate XTE J1752-223 in the high/soft state with MAXI, Suzaku, and Swift. :: Publications of the Astronomical Society of Japan. 2012 ; 巻 64, 番号 1.
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abstract = "We report on an X-ray spectral analysis of the black hole candidate XTE J1752-223 in the 2009-2010 outburst, utilizing data obtained with the MAXI/Gas Slit Camera (GSC), the Swift/XRT, and Suzaku, which work comple-mentarily. As already reported by Nakahira et al. (2010, PASJ, 62, L27), MAXI monitored the source continuously throughout the entire outburst for about eight months. All of the MAXI/GSC energy spectra in the high/soft state, lasting for 2 months, are well represented by a multi-color disk plus power-law model. The innermost disk temperature changed from ∼0.7 keV to ∼0.4 keV and the disk flux decreased by an order of magnitude. Nevertheless, the innermost radius is constant at ∼41 D 3.5(cos i) -1/2km, where D 3.5 is the source distance in units of 3.5kpc and i the inclination. The multi-color disk parameters obtained with the MAXI/GSC are consistent with those with the Swift/XRT and Suzaku. The Suzaku data also suggest a possibility that the disk emission is slightly Comptonized, which could account for broad iron-K features reported previously. Assuming that the obtained innermost radius represents the innermost stable circular orbit for a non-rotating black hole, we estimate the mass of the black hole to be 5.51 ± 0.28 M ⊙ D 3.5(cos -1/2, where the correction for the stress-free inner boundary condition and color hardening factor of 1.7 are taken into account. If the inclination is less than 49°, as suggested from radio monitoring of transient jets, and the soft-to-hard transition in 2010 April occurred at 1{\%}-4{\%} of Eddignton luminosity, the fitting of the Suzaku spectra with a relativistic accretion-disk model derives constraints on the mass and the distance to be 3.1-55M ⊙ and 2.3-22 kpc, respectively. This confirms that the compact object in XTE J1752-223 is a black hole.",
keywords = "Accretion disks, Black hole physics, Stars: individual (XTE J1752-223), X-rays: stars",
author = "Satoshi Nakahira and Shu Koyama and Yoshihiro Ueda and Kazutaka Yamaoka and Mutsumi Sugizaki and Tatehiro Mihara and Masaru Matsuoka and Atsumasa Yoshida and Kazuo Makishima and Ken Ebisawa and Aya Kubota and Shin'ya Yamada and Hitoshi Negoro and Kazuo Hiroi and Masaki Ishikawa and Nobuyuki Kawai and Masashi Kimura and Hiroki Kitayama and Mitsuhiro Kohama and Takanori Matsumura and Mikio Morii and Motoki Nakajima and Motoko Serino and Megumi Shidatsu and Tetsuya Sootome and Kousuke Sugimori and Fumitoshi Suwa and Hiroshi Tomida and Yoko Tsuboi and Hiroshi Tsunemi and Shiro Ueno and Ryuichi Usui and Takayuki Yamamoto and Kyohei Yamazaki and Tashiro, {Makoto S.} and Yukikatsu Terada and Hiromi Seta",
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month = "2",
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language = "English",
volume = "64",
journal = "Publication of the Astronomical Society of Japan",
issn = "0004-6264",
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TY - JOUR

T1 - A spectral study of the black hole candidate XTE J1752-223 in the high/soft state with MAXI, Suzaku, and Swift

AU - Nakahira, Satoshi

AU - Koyama, Shu

AU - Ueda, Yoshihiro

AU - Yamaoka, Kazutaka

AU - Sugizaki, Mutsumi

AU - Mihara, Tatehiro

AU - Matsuoka, Masaru

AU - Yoshida, Atsumasa

AU - Makishima, Kazuo

AU - Ebisawa, Ken

AU - Kubota, Aya

AU - Yamada, Shin'ya

AU - Negoro, Hitoshi

AU - Hiroi, Kazuo

AU - Ishikawa, Masaki

AU - Kawai, Nobuyuki

AU - Kimura, Masashi

AU - Kitayama, Hiroki

AU - Kohama, Mitsuhiro

AU - Matsumura, Takanori

AU - Morii, Mikio

AU - Nakajima, Motoki

AU - Serino, Motoko

AU - Shidatsu, Megumi

AU - Sootome, Tetsuya

AU - Sugimori, Kousuke

AU - Suwa, Fumitoshi

AU - Tomida, Hiroshi

AU - Tsuboi, Yoko

AU - Tsunemi, Hiroshi

AU - Ueno, Shiro

AU - Usui, Ryuichi

AU - Yamamoto, Takayuki

AU - Yamazaki, Kyohei

AU - Tashiro, Makoto S.

AU - Terada, Yukikatsu

AU - Seta, Hiromi

PY - 2012/2/25

Y1 - 2012/2/25

N2 - We report on an X-ray spectral analysis of the black hole candidate XTE J1752-223 in the 2009-2010 outburst, utilizing data obtained with the MAXI/Gas Slit Camera (GSC), the Swift/XRT, and Suzaku, which work comple-mentarily. As already reported by Nakahira et al. (2010, PASJ, 62, L27), MAXI monitored the source continuously throughout the entire outburst for about eight months. All of the MAXI/GSC energy spectra in the high/soft state, lasting for 2 months, are well represented by a multi-color disk plus power-law model. The innermost disk temperature changed from ∼0.7 keV to ∼0.4 keV and the disk flux decreased by an order of magnitude. Nevertheless, the innermost radius is constant at ∼41 D 3.5(cos i) -1/2km, where D 3.5 is the source distance in units of 3.5kpc and i the inclination. The multi-color disk parameters obtained with the MAXI/GSC are consistent with those with the Swift/XRT and Suzaku. The Suzaku data also suggest a possibility that the disk emission is slightly Comptonized, which could account for broad iron-K features reported previously. Assuming that the obtained innermost radius represents the innermost stable circular orbit for a non-rotating black hole, we estimate the mass of the black hole to be 5.51 ± 0.28 M ⊙ D 3.5(cos -1/2, where the correction for the stress-free inner boundary condition and color hardening factor of 1.7 are taken into account. If the inclination is less than 49°, as suggested from radio monitoring of transient jets, and the soft-to-hard transition in 2010 April occurred at 1%-4% of Eddignton luminosity, the fitting of the Suzaku spectra with a relativistic accretion-disk model derives constraints on the mass and the distance to be 3.1-55M ⊙ and 2.3-22 kpc, respectively. This confirms that the compact object in XTE J1752-223 is a black hole.

AB - We report on an X-ray spectral analysis of the black hole candidate XTE J1752-223 in the 2009-2010 outburst, utilizing data obtained with the MAXI/Gas Slit Camera (GSC), the Swift/XRT, and Suzaku, which work comple-mentarily. As already reported by Nakahira et al. (2010, PASJ, 62, L27), MAXI monitored the source continuously throughout the entire outburst for about eight months. All of the MAXI/GSC energy spectra in the high/soft state, lasting for 2 months, are well represented by a multi-color disk plus power-law model. The innermost disk temperature changed from ∼0.7 keV to ∼0.4 keV and the disk flux decreased by an order of magnitude. Nevertheless, the innermost radius is constant at ∼41 D 3.5(cos i) -1/2km, where D 3.5 is the source distance in units of 3.5kpc and i the inclination. The multi-color disk parameters obtained with the MAXI/GSC are consistent with those with the Swift/XRT and Suzaku. The Suzaku data also suggest a possibility that the disk emission is slightly Comptonized, which could account for broad iron-K features reported previously. Assuming that the obtained innermost radius represents the innermost stable circular orbit for a non-rotating black hole, we estimate the mass of the black hole to be 5.51 ± 0.28 M ⊙ D 3.5(cos -1/2, where the correction for the stress-free inner boundary condition and color hardening factor of 1.7 are taken into account. If the inclination is less than 49°, as suggested from radio monitoring of transient jets, and the soft-to-hard transition in 2010 April occurred at 1%-4% of Eddignton luminosity, the fitting of the Suzaku spectra with a relativistic accretion-disk model derives constraints on the mass and the distance to be 3.1-55M ⊙ and 2.3-22 kpc, respectively. This confirms that the compact object in XTE J1752-223 is a black hole.

KW - Accretion disks

KW - Black hole physics

KW - Stars: individual (XTE J1752-223)

KW - X-rays: stars

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