| Item type |
デフォルトアイテムタイプ_（フル）(1) |
| 公開日 |
2023-03-18 |
| タイトル |
|
|
タイトル |
Suzaku observation of two ultraluminous X-ray sources in NGC 1313 |
|
言語 |
en |
| 作成者 |
Mizuno, Tsunefumi
Miyawaki, Ryohei
Ebisawa, Ken
Kubota, Aya
Miyamoto, Masao
Winter, Lisa M.
Ueda, Yoshihiro
Isobe, Naoki
Dewangan, Gulab C.
Done, Chris
Griffiths, Richard E.
Haba, Yoshito
Kokubun, Motohide
Kotoku, Jun'ichi
Makishima, Kazuo
Matsushita, Kyoko
Mushotzky, Ricard F.
Namiki, Masaaki
Petre, Robert
Takahashi, Hiromitsu
Tamagawa, Toru
Terashima, Yuichi
|
| アクセス権 |
|
|
アクセス権 |
open access |
|
アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
| 権利情報 |
|
|
権利情報 |
Copyright (c) 2007 Astronomical Society of Japan |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
accretion, accretion disks |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
black hole physics |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
X-rays: individual (NGC 1313 X-1, NGC 1313 X-2) |
| 主題 |
|
|
主題Scheme |
NDC |
|
主題 |
440 |
| 内容記述 |
|
|
内容記述 |
Two ultraluminous X-ray sources (ULXs) in the nearby Sb galaxy NGC 1313, named X-1 and X-2, were observed with Suzaku on 2005 September 15. During the observation for a net exposure of 28 ks (but over a gross time span of 90 ks), both objects varied in intensity by about 50%. The 0.4–10 keV X-ray luminosities of X-1 and X-2 were measured as 2.5×1040 ergs-1 and 5.8×1039 ergs-1, respectively, with the former exhibiting the highest ever reported for this ULX. The spectrum of X-1 can be explained by the sum of a strong and variable powerlaw component with a high-energy cutoff, and a stable multicolor blackbody with an innermost disk temperature of ∼ 0.2keV. These results suggest that X-1 was in a “very high" state, where disk emission is strongly Comptonized. The absorber within NGC 1313 toward X-1 is suggested to have a subsolar oxygen abundance. The spectrum of X-2 is best represented, in its fainter phase, by a multicolor blackbody model with an innermost disk temperature of 1.2–1.3 keV, and becomes flatter as the source becomes brighter. Hence, X-2 is interpreted to be in a slim-disk state. These results suggest that the two ULXs have black hole masses of some dozens to a few hundred of solar masses. |
|
言語 |
en |
| 出版者 |
|
|
出版者 |
日本天文学会 |
| 言語 |
|
|
言語 |
eng |
| 資源タイプ |
|
|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
|
資源タイプ |
journal article |
| 出版タイプ |
|
|
出版タイプ |
VoR |
|
出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| 関連情報 |
|
|
|
識別子タイプ |
URI |
|
|
関連識別子 |
http://pasj.asj.or.jp/v59/sp1/59s122/59s122a.html |
| 収録物識別子 |
|
|
収録物識別子タイプ |
ISSN |
|
収録物識別子 |
0004-6264 |
| 収録物識別子 |
|
|
収録物識別子タイプ |
NCID |
|
収録物識別子 |
AA1082896X |
| 開始ページ |
|
|
開始ページ |
S257 |
| 書誌情報 |
Publications of the Astronomical Society of Japan
Publications of the Astronomical Society of Japan
巻 59,
p. S257-S267,
発行日 2007-01-25
|
| 旧ID |
20651 |
PASJ_59SP12953.pdf (442.8 KB)
