Main-sequence stellar eruption model for V838 monocerotis

Noam Soker*, Romuald Tylenda

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

113 Scopus citations


We propose that the energy source of the outburst of V838 Mon and similar objects is an accretion event, i.e., gravitational energy rather than thermonuclear runaway. We show that the merger of two main-sequence stars, of masses M1 ≃ 1.5 M and M2 = 0.1-0.5 M, can account for the luminosity, large radius, and low effective temperature of V838 Mon and similar objects. By varying the masses and types of the merging stars, and by considering slowly expanding, rather than hydrostatic, envelopes, this model can account for a large range in luminosities and radii of such outburst events.

Original languageEnglish
Pages (from-to)L105-L108
JournalAstrophysical Journal
Issue number2 II
StatePublished - 10 Jan 2003
Externally publishedYes


  • Binaries: close
  • Stars: horizontal-branch
  • Stars: individual (M31 RV, V838 Monocerotis, V4332 Sagittarii)
  • Stars: mass loss

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