A universal decline law of classical novae. IV. V838 her (1991): A very massive white dwarf

Mariko Kato, Izumi Hachisu, Angelo Cassatella

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

We present a unified model of optical and ultraviolet (UV) light curves for one of the fastest classical novae, V838 Herculis (Nova Herculis 1991), and estimate its white dwarf (WD) mass. Based on an optically thick wind theory of nova outbursts, we model the optical light curves with free-free emission and the UV 1455 Å light curves with blackbody emission. Our models of 1.35 0.02 M WD simultaneously reproduce the optical and UV 1455 observations. The mass lost by the wind is ΔM wind ∼ 2 × 10-6 M . We provide new determinations of the reddening, E(B - V) = 0.53 0.05, and of the distance, 2.7±0.5 kpc.

Original languageEnglish
Pages (from-to)1676-1688
Number of pages13
JournalAstrophysical Journal
Volume704
Issue number2
DOIs
Publication statusPublished - 2009

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novae
light curve
ultraviolet radiation
outburst
estimates

Keywords

  • Cataclysmic variables
  • Novae
  • Stars: individual (V838 Herculis)
  • Stars: mass loss
  • Ultraviolet: stars
  • White dwarfs

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

A universal decline law of classical novae. IV. V838 her (1991) : A very massive white dwarf. / Kato, Mariko; Hachisu, Izumi; Cassatella, Angelo.

In: Astrophysical Journal, Vol. 704, No. 2, 2009, p. 1676-1688.

Research output: Contribution to journalArticle

Kato, Mariko ; Hachisu, Izumi ; Cassatella, Angelo. / A universal decline law of classical novae. IV. V838 her (1991) : A very massive white dwarf. In: Astrophysical Journal. 2009 ; Vol. 704, No. 2. pp. 1676-1688.
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