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ヨネハラ アツノリ
YONEHARA ATSUNORI
米原 厚憲 所属 京都産業大学 理学部 宇宙物理・気象学科 職種 教授 |
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| 言語種別 | 英語 |
| 発行・発表の年月 | 2001/02 |
| 形態種別 | 研究論文 |
| 標題 | Evidence for a source size of less than 2000 Au in quasar 2237+0305 |
| 執筆形態 | その他 |
| 掲載誌名 | ASTROPHYSICAL JOURNAL |
| 出版社・発行元 | UNIV CHICAGO PRESS |
| 巻・号・頁 | 548(2),pp.L127-L130 |
| 著者・共著者 | A Yonehara |
| 概要 | Recently, the OGLE team has reported a clear quasar microlensing signal in Q2237+0305. We have analyzed the microlensing event of "image C" by using their finely sampled light curves. From the light-curve fitting, we can unambiguously set the source size of less than or similar to0.98 Einstein ring radius as a conservative limit. This limit corresponds to 2000 AU, if we adopt the M-lens similar to 0.1 M-. value obtained by a recent statistical study of the mean mass of the lens object. This is clear evidence for the existence of an accretion disk in the central region of the quasar. |
| DOI | 10.1086/319090 |
| ISSN | 0004-637X |