Multiwavelength observations of nova LMC 1990 number 2: The first extragalactic recurrent nova1

Steven N. Shore, George Sonneborn, Sumner Starrfield, M. Hamuy, R. E. Williams, A. Cassatella, H. Drechsel

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Abstract

We present IUE and optical observations of Nova LMC 1990 Number 2, the first recurrent nova to be observed outside the Milky Way. The earlier optical outburst of the nova was observed in 1968, when it reached a maximum of about V = 10.9. IUE spectra were obtained between 1990 February 16 and March 26, with 8 hr resolution during the first day of observations. The ultraviolet observations reported here caught the nova at UV maximum; no P Cygni profiles developed on the resonance lines, suggesting that very little mass was ejected and the outburst was not spherical. The integrated UV luminosity at UV maximum was 2.9 × 1038 ergs s-1. Thus the luminosity exceeded the Eddington limit for a one solar mass white dwarf [assuming E(B - V) = 0.15 and a distance of 55 kpc to the LMC]. This is the first time that the luminosity of a recurrent nova has been directly obtained.

Original languageEnglish (US)
Pages (from-to)193-197
Number of pages5
JournalAstrophysical Journal
Volume370
Issue number1
DOIs
StatePublished - Mar 20 1991

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Keywords

  • Galaxies: Magellanic Clouds
  • Stars: novae
  • Ultraviolet: spectra

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Shore, S. N., Sonneborn, G., Starrfield, S., Hamuy, M., Williams, R. E., Cassatella, A., & Drechsel, H. (1991). Multiwavelength observations of nova LMC 1990 number 2: The first extragalactic recurrent nova1. Astrophysical Journal, 370(1), 193-197. https://doi.org/10.1086/169804