V3885 sagittarius: A comparison with a range of standard model accretion disks

Albert P. Linnell, Patrick Godon, Ivan - Hubeny, Edward M. Sion, Paula Szkody, Paul E. Barrett

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

A analysis of standard model accretion disk synthetic spectrum fits to combined Far Ultraviolet Spectroscopic Explorer and Space Telescope Imaging Spectrograph spectra of V3885 Sagittarius, on an absolute flux basis, selects a model that accurately represents the observed spectral energy distribution. Calculation of the synthetic spectrum requires the following system parameters. The cataclysmic variable secondary star period-mass relation calibrated by Knigge in 2006 and 2007 sets the secondary component mass. A mean white dwarf (WD) mass from the same study, which is consistent with an observationally determined mass ratio, sets the adopted WD mass of 0.7 M, and the WD radius follows from standard theoretical models. The adopted inclination, i = 65°, is a literature consensus, and is subsequently supported by analysis. The mass transfer rate is the remaining parameter to set the accretion disk T eff profile, and the Hipparcos parallax constrains that parameter to by a comparison with observed spectra. The fit to the observed spectra adopts the contribution of a 57, 000 5000 K WD. The model thus provides realistic constraints on and T eff for a large system above the period gap.

Original languageEnglish (US)
Pages (from-to)1839-1850
Number of pages12
JournalAstrophysical Journal
Volume703
Issue number2
DOIs
StatePublished - 2009

Fingerprint

accretion disks
accretion
cataclysmic variables
parallax
spectral energy distribution
mass ratios
mass transfer
inclination
spectrographs
comparison
telescopes
stars
radii
profiles
energy
parameter
analysis

Keywords

  • Cataclysmic variables
  • Novae
  • Stars: individual (V3885 Sagittarius)
  • White dwarfs

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

V3885 sagittarius : A comparison with a range of standard model accretion disks. / Linnell, Albert P.; Godon, Patrick; Hubeny, Ivan -; Sion, Edward M.; Szkody, Paula; Barrett, Paul E.

In: Astrophysical Journal, Vol. 703, No. 2, 2009, p. 1839-1850.

Research output: Contribution to journalArticle

Linnell, Albert P. ; Godon, Patrick ; Hubeny, Ivan - ; Sion, Edward M. ; Szkody, Paula ; Barrett, Paul E. / V3885 sagittarius : A comparison with a range of standard model accretion disks. In: Astrophysical Journal. 2009 ; Vol. 703, No. 2. pp. 1839-1850.
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