Interferometric Observations of V838 Monocerotis

  title={Interferometric Observations of V838 Monocerotis},
  author={Benjamin F. Lane and A. J. Retter and R. R. Thompson and J. A. Eisner Mit and Penn State and IPACCaltech and Caltech},
  journal={The Astrophysical Journal},
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… 

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