Interferometric observations of V838 monocerotis

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

doi:10.1086/429619

Interferometric observations of V838 monocerotis

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

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18 Scopus citations

Abstract

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 language	English (US)
Pages (from-to)	L137-L140
Journal	Astrophysical Journal
Volume	622
Issue number	2 II
DOIs	https://doi.org/10.1086/429619
State	Published - Apr 1 2005
Externally published	Yes

Keywords

Stars: individual (V838 Monocerotis)
Techniques: interferometric

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/429619

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title = "Interferometric observations of V838 monocerotis",

abstract = "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.",

keywords = "Stars: individual (V838 Monocerotis), Techniques: interferometric",

author = "Lane, {B. F.} and A. Retter and Thompson, {R. R.} and Eisner, {J. A.}",

note = "Funding Information: We wish to acknowledge the extraordinary efforts of K. Rykoski and to thank an anonymous referee for helpful comments. Observations with PTI are made possible through the efforts of the PTI Collaboration, which we acknowledge. This research has made use of the Michelson Science Center at Caltech,5 JPL/NASA, the SIMBAD database CDS (Strasbourg, France), and of data products from the Two Micron All Sky Survey, which is a joint project of the University of Massachusetts and the IPAC/Caltech, funded by NASA and NSF. B. F. L. acknowledges support from a Pappalardo Fellowship in Physics, and J. A. E. is grateful for a Michelson Graduate Fellowship.",

year = "2005",

month = apr,

day = "1",

doi = "10.1086/429619",

language = "English (US)",

volume = "622",

pages = "L137--L140",

journal = "Astrophysical Journal",

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publisher = "IOP Publishing Ltd.",

number = "2 II",

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TY - JOUR

T1 - Interferometric observations of V838 monocerotis

AU - Lane, B. F.

AU - Retter, A.

AU - Thompson, R. R.

AU - Eisner, J. A.

N1 - Funding Information: We wish to acknowledge the extraordinary efforts of K. Rykoski and to thank an anonymous referee for helpful comments. Observations with PTI are made possible through the efforts of the PTI Collaboration, which we acknowledge. This research has made use of the Michelson Science Center at Caltech,5 JPL/NASA, the SIMBAD database CDS (Strasbourg, France), and of data products from the Two Micron All Sky Survey, which is a joint project of the University of Massachusetts and the IPAC/Caltech, funded by NASA and NSF. B. F. L. acknowledges support from a Pappalardo Fellowship in Physics, and J. A. E. is grateful for a Michelson Graduate Fellowship.

PY - 2005/4/1

Y1 - 2005/4/1

N2 - 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.

AB - 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.

KW - Stars: individual (V838 Monocerotis)

KW - Techniques: interferometric

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U2 - 10.1086/429619

DO - 10.1086/429619

M3 - Article

AN - SCOPUS:19944384922

SN - 0004-637X

VL - 622

SP - L137-L140

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2 II

ER -

Interferometric observations of V838 monocerotis

Abstract

Keywords

ASJC Scopus subject areas

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