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


Query : 2005A&A...431..321P

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 - 2024
#notes
1 SV* HV 5682 XB* 05 13 50.7836696744 -69 51 47.483136927     16.566 16.606 16.62 ~ 314 0
2 2E 1550 XB* 05 43 34.1600044704 -68 22 22.191505716   15.9   17.2 16.54 ~ 325 0
3 V* V382 Vel No* 10 44 48.3975221712 -52 25 31.168268472   15.945 15.737 16.173   ~ 194 0
4 V* V4743 Sgr No* 19 01 09.3393890856 -22 00 06.016418064           ~ 147 0
5 V* V1494 Aql No* 19 23 05.3600241442 +04 57 19.811779912           ~ 162 0

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