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ID 20643
本文ファイル
著者
Yamauchi, Shigeo
Ebisawa, Ken
Bamba, Aya
Ishida, Manabu
Iwasawa, Kazushi
Tanaka, Yasuo
Kokubun, Motohide
Koyama, Katsuji
Tsuboi, Yohko
キーワード
stars: flare
stars: individual (Suzaku J1844-0404)
X-rays: spectra
X-rays: stars
X-rays: transients
NDC
天文学・宇宙科学
抄録(英)
During an observation of the Galactic plane in the Scutum region with the Suzaku satellite, we discovered a new X-ray transient source, designated Suzaku J1844-0404. Compared with previous Chandra observations of the same field, four Chandra X-ray sources exist within the current positional uncertainty of Suzaku J1844-0404. A firm identification is not possible. From the beginning of the observation, the X-ray intensity was significant at ∼ 5×10-14 erg s-1 cm-2 (2–10 keV), which may be a possible precursor. Later, the source exhibited a flare with a peak flux of ∼ 10-12 erg s-1 cm-2 (2–10 keV). A strong and narrow emission line at ∼ 6.66 keV was observed during the flare, most likely the He-like Fe line. The spectrum in 1–10 keV is consistent with a heavily absorbed (NH ∼3×1022Hcm-2) thin thermal emission with kT as high as ∼7keV. A single short flare, as observed, is rather unlikely for a cataclysmic variable. The source is probably an active binary star or a young stellar object.
掲載誌名
Publications of the Astronomical Society of Japan
59巻
開始ページ
S215
終了ページ
S220
出版年月日
2007-01-25
出版者
日本天文学会
ISSN
0004-6264
NCID
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
publisher
権利情報
Copyright (c) 2007 Astronomical Society of Japan
関連情報URL
部局名
理学研究科