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Actvity on T Tauri Stars

  • Erik Gullbring (a1), Gösia F. Gahm (a1), Heinz Barwig (a2) and Peicheng Chen (a3)

Extract

We have made a detailed investigation of the short-term variability of the classical T Tauri star BP Tauri in UBVRI. Data were collected from the Wendelstein Observatory in 1991, 1992 and 1993 with time resolutions down to 1 sec. The 0.8m telescope was equipped with a fiber-fed fifteen channel high-speed photometer (Barwig et al. 1987). Observations (in UBV) were also collected in China at the Yunnan and Shanghai Observatories to get a long base line in time. To search for differences in the properties between the brightness variations of classical T Tauri stars (CTTS) and T Tauri stars with weak emission lines (WTTS) we performed simultaneous photometry (in the UBV and Strömgren systems) and spectroscopy of 6 young stars during two observing periods at ESO La Silla. The study concerned mainly short-term variability on time-scales of minutes to a few hours. The sample contained two CTTS, SY Ori and VW Cha; three WTTS, San 1, SZ Cha and ADA 481 and one post-T Tauri candidate, HD 70309B.

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References

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Barwig, H., Shoembs, R., Buckenmayer, C., 1987, A&A 175, 327
Gahm, G.F., Lodén, K., Gullbring, E., Hartstein, D., 1995, A&A (in press)
Gullbring, E., Barwig, H., Chen, P.S., Gahm, G.F., Bao, M.X., Chen, Y.K., 1995, A&A (in prep.)

Actvity on T Tauri Stars

  • Erik Gullbring (a1), Gösia F. Gahm (a1), Heinz Barwig (a2) and Peicheng Chen (a3)

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