2005A&A...431..321P


C.D.S. - SIMBAD4 rel 1.7 - 2020.12.03CET19:16:35

2005A&A...431..321P - Astronomy and Astrophysics, volume 431, 321-328 (2005/2-3)

Modeling CHANDRA low energy transmission grating spectrometer observations of classical novae with PHOENIX. I. V4743 Sagittarii.

PETZ A., HAUSCHILDT P.H., NESS J.-U. and STARRFIELD S.

Abstract (from CDS):

We use the PHOENIX code package to model the X-ray spectrum of Nova V4743 Sagittarii observed with the LETGS onboard the Chandra satellite 19 March 2003. Our atmosphere models are 1D spherical, expanding, line blanketed, and in full non-local thermodynamic equilibrium. To analyze nova atmospheres and related systems with an underlying nuclear burning envelope at X-ray wavelengths, it was necessary to update the code with new microphysics, as discussed in this paper. We demonstrate that the X-ray emission is dominated by thermal bremsstrahlung and that the hard X-rays are dominated by Fe and N absorption. The best fit to the observation is provided at a temperature of Teff=5.8x105K, with Lbol=50000L. The models are calculated for solar abundances. It is shown that the models can be used to determine abundances in the nova ejecta.

Abstract Copyright:

Journal keyword(s): stars: novae, cataclysmic variables - X-rays: individual: V4743 Sgr - stars: atmospheres - atomic data

Simbad objects: 5

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Number of rows : 5

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 SV* HV 5682 XB* 05 13 50.809 -69 51 47.30     16.566 16.606 16.62 ~ 306 0
2 2E 1550 XB* 05 43 34.1600994175 -68 22 22.189299745   15.9   17.2 16.54 ~ 307 0
3 NOVA Vel 1999 No* 10 44 48.39 -52 25 30.7           ~ 169 0
4 NOVA Sgr 2002 c No* 19 01 09.38 -22 00 05.9           ~ 122 0
5 V* V1494 Aql No* 19 23 05.30 +04 57 19.1           ~ 147 0

    Equat.    Gal    SGal    Ecl

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2020.12.03-19:16:35

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