Modeling the spectrum of V4334 Sgr (Sakurai's object)

Details Modeling the spectrum of V4334 Sgr (Sakurai's object) Modeling the spectrum of V4334 Sgr (Sakurai's object)

Feb 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000a%26a...354..229p&link_type=abstract

Astronomy and Astrophysics, v.354, p.229-235 (2000)

Astronomy and Astrophysics

Astrophysics

19

Stars: Abundances, Stars: Atmospheres, Stars: Agb And Post-Agb, Stars: Individual: V 4334 Sgr

Scientific paper

Theoretical spectral energy distributions were computed for a grid of hydrogen-deficient and carbon-rich model atmospheres of T_eff in the range of 5000-6250 K and log g = 1.0 - 0.0 by the technique of opacity sampling, taking into account continuous molecular band and atomic line absorption. These energy distributions were compared with the spectrum of V4334 Sgr (Sakurai's object) from April, 1997 in the wavelength interval 300-1000 nm. We show that (1) the shape of the theoretical spectra depends strongly on T_eff, but only very weakly on the hydrogen abundance; (2) the comparison of the observed and computed spectra permits us to estimate T_eff ~ 5500 K for V4334 Sgr in April, 1997, and its interstellar reddening (plus a possible circumstellar contribution) E_B-V~ 0.70.

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