| タイトル | Results from an extensive Einstein stellar survey |
| 著者（英） | Cassinelli, J. P.; Fabbiano, G.; Johnson, H. M.; Gorenstein, P.; Linsky, J. L.; Haisch, B. M.; Harnden, F. R., Jr.; Golub, L.; Giacconi, R.; Vaiana, G. S. |
| 著者所属（英） | Harvard-Smithsonian Center for Astrophysics|Osservatorio Astronomico |
| 発行日 | 1981-04-01 |
| 言語 | eng |
| 内容記述 | The preliminary results of the Einstein Observatory stellar X-ray survey are presented. To date, 143 soft X-ray sources have been identified with stellar counterparts, leaving no doubt that stars in general constitute a pervasive class of low-luminosity galactic X-ray sources. Stars along the entire main sequence, of all luminosity classes, pre-main sequence stars as well as very evolved stars have been detected. Early type OB stars have X-ray luminosities in the range 10 to the 31st to 10 to the 34th ergs/s; late type stars show a somewhat lower range of X-ray emission levels, from 10 to the 26th to 10 to the 31st ergs/s. Late type main-sequence stars show little dependence of X-ray emission levels upon stellar effective temperature; similarly, the observations suggest weak, if any, dependence of X-ray luminosity upon effective gravity. Instead, the data show a broad range of emission levels (about three orders of magnitude) throughout the main sequence later than F0. |
| NASA分類 | ASTRONOMY |
| レポートNO | 81A32717
PB81-236309 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/234423 |
|
