| |
 |
| Paper: |
Color Anomalies of Weak Lined T Tauri stars |
| Volume: |
154, Cool Stars, Stellar Systems and the Sun: Tenth Cambridge Workshop |
| Page: |
1709 |
| Authors: |
Gullbring, E.; Hartmann, L.; Briceno, C.; Calvet, N.; Muzerolle, J. |
| Abstract: |
We present results showing that the stellar photospheric emission from non-accreting T Tauri stars (WTTS) in the Taurus-Auriga star forming region exhibit large color anomalies compared to main-sequence stars. A compilation of published broad band photometric data, ranging from V to M, shows that the WTTS are much redder in the near infrared than main-sequence stars of similar spectral types. In addition, we present spectrograms, in the wavelength region 6000 - 8000 AA, indicating later spectral types with longer wavelengths. The reason for the color anomalies are unknown, but we are presently investigating the possibility of cooler companion stars and/or large spots on the stellar surface to account for the excesses. This poster is intended to attract the attention to the color anomaly problem. In particular, surface (Doppler) imaging methods are desirable both to investigate the possibility of very large axisymmetric spots and also how hotter ``plage'' regions might affect the color of the star. In addition, synthetic broad band colors of surface maps, ranging from the V to the J-band, are desirable to investigate the resulting color anomalies. |
|
|
|
|
|
