Infall variability in the Classical T Tauri system VZ Chamaeleonis

K Smith, G F Lewis, Ian Alexander Bonnell, J P Emerson

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)1003-1013
Number of pages11
JournalAstronomy & Astrophysics
Volume378
Issue number3
DOIs
Publication statusPublished - Nov 2001

Keywords

  • accretion
  • accretion disks
  • stars : activity, pre-main sequence, variables : general
  • MAGNETOSPHERIC ACCRETION MODELS
  • DISK ACCRETION
  • SU AURIGAE
  • STARS
  • RATES
  • WINDS
  • FLOWS

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