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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 | 1999/08 |
| 形態種別 | その他 |
| 標題 | Gravitational microlens mapping of a quasar accretion disk |
| 執筆形態 | その他 |
| 掲載誌名 | PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN |
| 出版社・発行元 | OXFORD UNIV PRESS |
| 巻・号・頁 | 51(4),pp.497-504 |
| 著者・共著者 | S Mineshige,A Yonehara |
| 概要 | Since the radiation from different portions in the central region of a quasar can be successively amplified during a microlensing event, microlensing light curves provide fruitful information regarding the emissivity distribution of an accretion disk located at the quasar center. We present a basic methodology of how to map the emissivity distribution of the disk as a function of the radial distance from the center, Q(r), from 'observed' microlens light curves during a caustic crossing event. Our proposed method is based on the standard inversion technique, the so-called regularization method, and Abel's transformation of the one-dimensional luminosity profile integrated along the line parallel to the caustics. This technique will be used to map the disk structure in Q2237+0305, for which the HST and AXAF observations are scheduled. A reconstruction of the image on length scales of several to ten AUs is quite feasible for this source, as long as the measuring errors are within 0.02 mag and the observation time intervals are one week or less. |
| DOI | 10.1093/pasj/51.4.497 |
| ISSN | 0004-6264/2053-051X |