Back to Search
Start Over
Simultaneous observations of Ca II K and Mg II k in T Tauri stars
- Source :
- Astrophysical Journal, Part 1. 293
- Publication Year :
- 1985
- Publisher :
- United States: NASA Center for Aerospace Information (CASI), 1985.
-
Abstract
- The first simultaneous, calibrated observations of the Ca II K and Mg II k resonance lines in T Tauri stars are presented. It is found that for T Tauri stars with mass greater than 1.5 solar mass, which have radiative cores and tend to be fast rotators, the k line seems to arise in an extended region (probably also responsible for the H-alpha emission), whereas the K line apparently originates closer to the highly inhomogeneous stellar surface. The lower mass stars, which are fully convective and tend to be slow rotators, are more easily described by a largely chromospheric model, consistent with main-sequence activity structures but at greater values of the nonradiative flux. The strongest emission-line stars in the low-mass group, however, are also likely to have extended k line regions.
- Subjects :
- Astrophysics
Subjects
Details
- Language :
- English
- ISSN :
- 0004637X
- Volume :
- 293
- Database :
- NASA Technical Reports
- Journal :
- Astrophysical Journal, Part 1
- Notes :
- NAS5-25774, , NSF AST-81-06094
- Publication Type :
- Report
- Accession number :
- edsnas.19850056895
- Document Type :
- Report
- Full Text :
- https://doi.org/10.1086/163262