Periodic Light Variability in Four Late-Type Pre-Main-Sequence Stars
Abstract
While the T Tauri stars are the best known of the late-type pre-main-sequence (PMS) stars, there are also some late-type PMS stars with only weak line emission in their visible spectra. Several years ago we noted that the weak-emission PMS stars have B-V colors too blue for their V-I colors and suggested that their surfaces might have regions of differing temperature. During October 1981 we used the USNO 40-inch and Kitt Peak National Observatory No. 4 16-inch telescopes to monitor, over a 7 night interval with UBVRI photometry, four of these weak-emission PMS stars: HD 283447, V410 Tau, and X-ray stars 1 and 2 of Feigelson and Kriss (1981). The PMS nature of these stars is established from (1) their membership in the Taurus dark cloud T-association and (2) their location within the T Tauri band region of the H-R diagram.
- Publication:
-
IAU Colloq. 71: Activity in Red-Dwarf Stars
- Pub Date:
- 1983
- DOI:
- 10.1007/978-94-009-7157-8_71
- Bibcode:
- 1983ASSL..102..503V