X-ray/optical observations of stars with shallow convection zones (A8-G2 V)
Abstract
We present Walraven photometry and ROSAT All-Sky Survey data for a sample of 173 bright main-sequence stars with spectral types between A8V and G2V\@. These observations are part of a study of the onset of magnetic surface activity along the main sequence. Values for the effective temperature, surface gravity and interstellar reddening have been obtained from a comparison of the observed Walraven colours with theoretical values. These parameters have been used to derive accurate X-ray\ surface flux densities.
- Publication:
-
Astronomy and Astrophysics Supplement Series
- Pub Date:
- February 1998
- DOI:
- 10.1051/aas:1998126
- Bibcode:
- 1998A&AS..128...29P
- Keywords:
-
- STARS: ACTIVITY;
- FUNDAMENTAL PARAMETERS;
- X-RAYS: STARS