| タイトル | Stellar model chromospheres. IX - Chromospheric activity in dwarf stars |
| 著者（英） | Worden, S. P.; Linsky, J. L.; Kelch, W. L. |
| 著者所属（英） | Sacramento Peak Observatory|Joint Inst. for Lab. Astrophysics |
| 発行日 | 1979-04-15 |
| 言語 | eng |
| 内容記述 | High-resolution Ca II K line profiles are used to model the upper photospheres and lower chromospheres of eight main-sequence stars ranging in spectral type from F0 to M0 and exhibiting different degrees of chromospheric activity. The model chromospheres are studied as a function of spectral type and activity for stars of similar spectral type in order to obtain evidence of enhanced nonradiative heating in the upper-photospheric models and in the ratio of minimum temperature at the base of the chromosphere to effective temperature, a correlation between activity and temperature in the lower chromospheres, and a correlation of the width at the base of the K-line emission core and at the K2 features with activity. Chromospheric radiative losses are estimated for the modelled stars and other previously analyzed main-sequence stars. The results obtained strengthen the argument that dMe flare stars exhibit fundamentally solar-type activity but on an increased scale. |
| NASA分類 | ASTROPHYSICS |
| レポートNO | 79A33156
PB80-118086
AD-A083858
AFGL-TR-80-0106 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/234775 |
