The wind of variable C in M33

Roberta M Humphreys, Kris Davidson, Michael S. Gordon, Kerstin Weis, Birgitta Burggraf, D. J. Bomans, John C. Martin

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

We discuss the spectrum of Var C in M33 obtained just before the onset of its current brightening and its recent spectra during its present "eruption" or optically thick wind stage. These spectra illustrate the typical luminous blue variable (LBV) transition in apparent spectral type or temperature that characterizes the classical LBV or S Dor-type variability. LBVs are known to have slow, dense winds during their maximum phase. Interestingly, Var C had a slow wind even during its hot, quiescent stage in comparison with the normal hot supergiants with similar temperatures. Its outflow or wind speeds also show very little change between these two states.

Original languageEnglish (US)
Article numberL21
JournalAstrophysical Journal Letters
Volume782
Issue number2
DOIs
StatePublished - Feb 20 2014

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outflow
volcanic eruption
wind velocity
temperature
volcanic eruptions
comparison

Keywords

  • stars: massive
  • stars: variables: S Doradus
  • stars: winds, outflows

Cite this

Humphreys, R. M., Davidson, K., Gordon, M. S., Weis, K., Burggraf, B., Bomans, D. J., & Martin, J. C. (2014). The wind of variable C in M33. Astrophysical Journal Letters, 782(2), [L21]. https://doi.org/10.1088/2041-8205/782/2/L21

The wind of variable C in M33. / Humphreys, Roberta M; Davidson, Kris; Gordon, Michael S.; Weis, Kerstin; Burggraf, Birgitta; Bomans, D. J.; Martin, John C.

In: Astrophysical Journal Letters, Vol. 782, No. 2, L21, 20.02.2014.

Research output: Contribution to journalArticle

Humphreys, RM, Davidson, K, Gordon, MS, Weis, K, Burggraf, B, Bomans, DJ & Martin, JC 2014, 'The wind of variable C in M33', Astrophysical Journal Letters, vol. 782, no. 2, L21. https://doi.org/10.1088/2041-8205/782/2/L21
Humphreys RM, Davidson K, Gordon MS, Weis K, Burggraf B, Bomans DJ et al. The wind of variable C in M33. Astrophysical Journal Letters. 2014 Feb 20;782(2). L21. https://doi.org/10.1088/2041-8205/782/2/L21
Humphreys, Roberta M ; Davidson, Kris ; Gordon, Michael S. ; Weis, Kerstin ; Burggraf, Birgitta ; Bomans, D. J. ; Martin, John C. / The wind of variable C in M33. In: Astrophysical Journal Letters. 2014 ; Vol. 782, No. 2.
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