Analysis of Chandra-LETG spectra of two DA white dwarfs and a PG1159 star

Details Analysis of Chandra-LETG spectra of two DA white dwarfs and a PG1159 star Analysis of Chandra-LETG spectra of two DA white dwarfs and a PG1159 star

Nov 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1273..406a&link_type=abstract

17TH EUROPEAN WHITE DWARF WORKSHOP. AIP Conference Proceedings, Volume 1273, pp. 406-411 (2010).

Computer Science

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White Dwarfs, X-Ray Spectra, Spectral Analysis, Chemical Analysis, Sky Surveys, Faint Blue Stars, White Dwarfs, Degenerate Stars, Nuclei Of Planetary Nebulae, X-Ray, Luminosities, Magnitudes, Effective Temperatures, Colors, And Spectral Classification, Chemical Composition And Chemical Evolution, Astronomical Catalogs, Atlases, Sky Surveys, Databases, Retrieval Systems, Archives, Etc.

Scientific paper

We present results of model-atmosphere analyses of soft X-ray spectra of three hot WDs. These are the relatively iron-rich DA GD246, the surprisingly metal-poor DA LB1919, and the H-deficient PG1159-type star PG1520+525. The two DAs are modeled with chemically stratified and with homogeneous NLTE models in order to constrain metal abundances. FUSE and HST spectra are also employed. For the PG1159 star the effective temperature can be constrained to a precision that is not attained with optical and UV spectroscopy alone.

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