| タイトル | The distribution of rotational velocities for low-mass stars in the Pleiades |
| 著者（英） | Stauffer, John R.; Hartmann, Lee W. |
| 著者所属（英） | NASA Ames Research Center|Dominion Astrophysical Observatory|Smithsonian Astrophysical Observatory |
| 発行日 | 1987-07-01 |
| 言語 | eng |
| 内容記述 | The available spectral type and color data for late-type Pleiades members have been reanalyzed, and new reddening estimates are obtained. New photometry for a small number of stars and a compilation of H-alpha equivalent widths for Pleiades dwarfs are presented. These data are used to examine the location of the rapid rotators in color-magnitude diagrams and the correlation between chromospheric activity and rotation. It is shown that the wide range of angular momenta exhibited by Pleiades K and M dwarfs is not necessarily produced by a combination of main-sequence spin-downs and a large age spread; it can also result from a plausible spread in initial angular momenta, coupled with initial main-sequence spin-down rates that are only weakly dependent on rotation. The new reddening estimates confirm Breger's (1985) finding of large extinctions confined to a small region in the southern portion of the Merope nebula. |
| NASA分類 | ASTROPHYSICS |
| レポートNO | 87A46599 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/376605 |
