| アイテムタイプ |
会議発表論文 / Conference Paper(1) |
| 公開日 |
2015-03-26 |
| タイトル |
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タイトル |
Suzaku Observation of a New X-ray Outburst from the Accreting Young Star Illuminating McNeil's Nebula |
|
言語 |
en |
| 言語 |
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|
言語 |
eng |
| キーワード |
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|
言語 |
en |
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主題Scheme |
Other |
|
主題 |
stars: formation - stars: individual (V1647 Ori) - stars: pre-main-sequence - X-rays: stars |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_5794 |
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資源タイプ |
conference paper |
| 著者 |
Hamaguchi, Kenji
Grosso, Nicolas
Kastner, Joel H.
Weintraub, David A.
Richmond, Michael
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| 著者所属（英） |
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en |
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CRESST and X-ray Astrophysics Laboratory NASA/GSFC |
| 著者所属（英） |
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en |
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Observatoire astronomique de Strasbourg, Universite de Strasbourg |
| 著者所属（英） |
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en |
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Rochester Institute of Technology |
| 著者所属（英） |
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en |
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Vanderbilt University |
| 著者所属（英） |
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en |
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Vanderbilt University |
| 出版者 |
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出版者 |
宇宙航空研究開発機構 |
| 出版者（英） |
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出版者 |
Japan Aerospace Exploration Agency (JAXA) |
| 書誌情報 |
宇宙航空研究開発機構特別資料:
en : JAXA Special Publication: The Energetic Cosmos; from Suzaku to ASTRO-H
巻 JAXA-SP-09-008E,
p. 196-197,
発行日 2010-02-26
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| 会議概要（会議名, 開催地, 会期, 主催者等）（英） |
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内容記述タイプ |
Other |
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内容記述 |
The 3rd Suzaku international Conference "Energetic Cosmos : from Suzaku to ASTRO-H" (June 29-July 2, 2009. Grand Park Otaru Hotel), Otaru, Hokkaido Japan |
| 抄録（英） |
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内容記述タイプ |
Other |
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内容記述 |
A deeply embedded young stellar object (YSO) in the L1630 dark cloud has been observed undergoing a new strong optical/near-infrared outburst in 2008 August. The star, V1647 Ori, is the same star that underwent an accretion-powered outburst in 2003-2005; during this eruption we recorded, for the first time, a sustained X-ray outburst from a rapidly accreting YSO. The X-ray activity is suspected to be driven by a star-disk magnetic dynamo, accompanied by rapid mass accretion. However, observations that might support or refute this hypothesis have been limited in quantity and quality. We triggered a ToO observation of V1647 Ori with Suzaku for 40 ksec on 2008 October 8 using Director's Discretionary Time. During the observation, V1647 Ori showed a gradual flux decrease by a factor of 5 and then displayed an abrupt flux increase by an order of magnitude. The spectrum clearly displays emission from Helium-like iron, which is a signature of hot plasma (kT approximately 5 keV). Such X-ray properties were also seen in an XMM-Newton observation during the first outburst, but it has rarely been observed for other YSOs. Hence, the new outburst started in 2008 is likely driven by a mechanism similar to that of the first outburst. The Suzaku/XIS spectrum of V1647 Ori also shows a remarkable fluorescent iron K line with an equivalent width of approximately 600 eV. Such a large equivalent width indicates that a part of the incident X-ray emission that irradiates the circumstellar material is hidden from our line of sight. |
| 内容記述（英） |
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内容記述タイプ |
Other |
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内容記述 |
Meeting sponsors: The University of Tokyo, The Institute of Physical and Chemical Research, The Japan Society for the Promotion of Science |
| ISSN |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
1349-113X |
| 書誌レコードID |
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収録物識別子タイプ |
NCID |
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収録物識別子 |
AA11984031 |
| 資料番号 |
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内容記述タイプ |
Other |
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内容記述 |
資料番号: AA0064574070 |
| レポート番号 |
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内容記述タイプ |
Other |
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内容記述 |
レポート番号: JAXA-SP-09-008E |
64574070.pdf (193.9 kB)
