The early ultraviolet evolution of the ONeMg nova V382 Velorum 1999

Steven N. Shore, Greg Schwarz, Howard E. Bond, Ronald A. Downes, Sumner Starrfield, A. Evans, Robert D. Gehrz, Peter H. Hauschildt, Joachim Krautter, Charles E. Woodward

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45 Scopus citations

Abstract

We present a multiwavelength study of the ONeMg Galactic nova V382 Velorum 1999 using HST/STIS and FUSE ultraviolet spectra and comparisons with published ground-based optical spectra. We find a close match to the basic phenomenology of another well-studied ONeMg nova, V1974 Cygni (Nova Cyg 1992), in particular, to the spectral development through the start of the nebular phase. Following an "iron curtain" phase, the nova proceeded through a stage of P Cygni line profiles on all important resonance lines, as in many ONeMg novae and unlike the CO class. Emergent emission lines displayed considerable structure, as seen in VI974 Cyg, indicating fragmentation of the ejecta at the earliest stages of the outburst. Analysis and modeling of our ultraviolet spectra suggest that (4-5) × 10-4 M of material was ejected and that the distance to the nova is ≃2.5 kpc. Relative to solar values, we find the following abundances: He = 1.0, C = 0.6 ± 0.3, N = 17 ± 4, O = 3.4 ± 0.3, Ne = 17 ± 3, Mg = 2.6 ± 0.1, Al = 21 ± 2, and Si = 0.5 ± 0.3. Finally, we briefly draw comparisons with Nova LMC 2000, another ONeMg nova, for which similar data were obtained with HST and FUSE.

Original languageEnglish (US)
Pages (from-to)1507-1518
Number of pages12
JournalAstronomical Journal
Volume125
Issue number3 1767
DOIs
StatePublished - Mar 1 2003

Keywords

  • Novae, cataclysmic variables
  • Stars: individual (V382 Velorum)
  • Ultraviolet: stars

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Shore, S. N., Schwarz, G., Bond, H. E., Downes, R. A., Starrfield, S., Evans, A., Gehrz, R. D., Hauschildt, P. H., Krautter, J., & Woodward, C. E. (2003). The early ultraviolet evolution of the ONeMg nova V382 Velorum 1999. Astronomical Journal, 125(3 1767), 1507-1518. https://doi.org/10.1086/367803