| タイトル | The ensemble variability properties of faint QSOs |
| 著者（英） | Kron, Richard G.; Koo, David C.; Bershady, Matthew A.; Trevese, Dario; Majewski, Steven R. |
| 著者所属（英） | NASA Headquarters; NASA Goddard Space Flight Center |
| 発行日 | 1994-10-01 |
| 言語 | eng |
| 内容記述 | A refined sample of 64 variable objects with stellar image structure has been identified in SA 57 to B approximately = 22.5, over a time baseline of 15 yr, sampled at 11 distinct epochs. The photometric data typically have a root-mean-square (rms) error at B = 22 of only 0.05 mag. Thirty-five quasars in this field have already been spectroscopically confirmed, 34 of which are among the sample of variables. Of the other variables, six are known spectroscopically to be stars, 10 additional objects are stars based on reliable detection of proper motion, and one is spectroscopically a narrow emission line galaxy. Of the 13 remaining variables, it is argued that they are a mixture of distant halo subdwarfs and quasars with starlike colors. We compute the ensemble average structure function and autocorrelation function from the light curves in the respective quasar rest frames, which are used to investigate the general dependences on apparent magnitude, absolute magnitude, and redshift. |
| NASA分類 | ASTROPHYSICS |
| レポートNO | 95A72448 |
| 権利 | Copyright |
|
