|
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 |
|
| 言語種別 | 英語 |
| 発行・発表の年月 | 1999/03 |
| 形態種別 | 研究論文 |
| 標題 | Microlens diagnostics of accretion disks in active galactic nuclei |
| 執筆形態 | その他 |
| 掲載誌名 | ASTRONOMY & ASTROPHYSICS |
| 出版社・発行元 | EDP SCIENCES S A |
| 巻・号・頁 | 343(1),pp.41-50 |
| 著者・共著者 | A Yonehara,S Mineshige,J Fukue,M Umemura,EL Turner |
| 概要 | The optical-ultraviolet continuum from active galactic nuclei (AGN) seems to originate from optically thick and/or thin disks, and occasionally from associated circumnuclear starburst regions. These different possible origins can, in principle, be distinguished by observations of gravitational microlensing events. We performed numerical simulations of microlensing of an AGN disk by a single lensing star passing in front of the AGN. Calculated spectral variations and light curves show distinct behavior, depending on the nature of the emitting region; time variation over few months with strong wavelength dependence is expected in the case of an optically thick disk (standard disk), while an optically thin disk (advection-dominated disk) will produce shorter, nearly wavelength-independent variation. In the case of an associated circumnuclear starburst region much slower variations (over a year) will be superposed on the shorter variations caused by microlensing of the disk. |
| ISSN | 0004-6361/1432-0746 |