Interferometric observations of V838 monocerotis

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

Research output: Contribution to journalArticle

16 Citations (Scopus)

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 languageEnglish (US)
JournalAstrophysical Journal
Volume622
Issue number2 II
DOIs
StatePublished - Apr 1 2005
Externally publishedYes

Fingerprint

peculiar stars
variable stars
ejecta
interferometry
outburst
radii

Keywords

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

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Interferometric observations of V838 monocerotis. / Lane, B. F.; Retter, A.; Thompson, R. R.; Eisner, Joshua A.

In: Astrophysical Journal, Vol. 622, No. 2 II, 01.04.2005.

Research output: Contribution to journalArticle

Lane, B. F. ; Retter, A. ; Thompson, R. R. ; Eisner, Joshua A. / Interferometric observations of V838 monocerotis. In: Astrophysical Journal. 2005 ; Vol. 622, No. 2 II.
@article{a0815e8007024e43b6b39fdd6306bb50,
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, {Joshua A}",
year = "2005",
month = "4",
day = "1",
doi = "10.1086/429619",
language = "English (US)",
volume = "622",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "IOP Publishing Ltd.",
number = "2 II",

}

TY - JOUR

T1 - Interferometric observations of V838 monocerotis

AU - Lane, B. F.

AU - Retter, A.

AU - Thompson, R. R.

AU - Eisner, Joshua A

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

UR - http://www.scopus.com/inward/record.url?scp=19944384922&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=19944384922&partnerID=8YFLogxK

U2 - 10.1086/429619

DO - 10.1086/429619

M3 - Article

AN - SCOPUS:19944384922

VL - 622

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 2 II

ER -