Infall variability in the Classical T Tauri system VZ Chamaeleonis

Details Infall variability in the Classical T Tauri system VZ Chamaeleonis Infall variability in the Classical T Tauri system VZ Chamaeleonis

2001-10-21

arxiv.org/abs/astro-ph/0110470v1

Astronomy and Astrophysics

Astrophysics

10 pages, includes 14 postscript files

Scientific paper

10.1051/0004-6361:20011285

We present time series spectroscopy of the Classical T Tauri star VZ Cha. We follow spectral variations at intermediate resolution over five successive nights, or approximately two rotation periods. We see profile features which persist on timescales longer than the expected infall time from the inner disc, and we see expected evidence of rotational variations in the lines, but we also note that rotation alone cannot produce all the observed variability and some other mechanism must be invoked. The behaviour of H-alpha is observed to be markedly different from that of the other lines. In particular, the evidence of rotational effects is lacking at H-alpha, and the activity in the red and blue wings of the line is not significantly correlated, in contrast to the other Balmer lines.

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