Interferometric observations of V838 monocerotis

B. F. Lane, A. Retter, R. R. Thompson, J. A. Eisner

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


We have used long-baseline near-IR interferometry to resolve the peculiar eruptive variable star V838 Mon and to provide the first direct measurement of its angular size. Assuming a uniform disk model for the emission, we derive an apparent angular diameter at the time of observations (2004 November-December) of 1.83 ± 0.06 mas. For a nominal distance of 8 ± 2 kpc, this implies a linear radius of 1570 ± 400 R⊙. However, the data are somewhat better fitted by elliptical disk or binary component models, and we suggest that the emission may be strongly affected by ejecta from the outburst.

Original languageEnglish (US)
Pages (from-to)L137-L140
JournalAstrophysical Journal
Issue number2 II
StatePublished - Apr 1 2005


  • Stars: individual (V838 Monocerotis)
  • Techniques: interferometric

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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