Chandra Observations of Hot White Dwarf Stars

Details Chandra Observations of Hot White Dwarf Stars Chandra Observations of Hot White Dwarf Stars

Jan 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aspc..262...57v&link_type=abstract

The High Energy Universe at Sharp Focus: Chandra Science, held in conjunction with the 113th Annual Meeting of the ASP. ASP Conf

Astronomy and Astrophysics

Astronomy

6

Scientific paper

Chandra observations of hot hydrogen-rich white dwarfs allowed us to extend our study of their atmospheric metallicity to the extreme case of GD 246. Dupuis, Vennes, & Chayer (in prep.) report the detection of Fe V/VI/VII absorption lines in the Chandra LETG spectrum of GD 246 which imposes a low and possibly inhomogeneous abundance of iron in its atmosphere. Similar observations of HZ 43 impose an even lower limit to the iron abundance which suggests the effect of on-going chemical separation. Non-LTE spectral simulations show that additional iron abundance studies with Chandra would offer unique insights into the problem of the spectral evolution of white dwarf stars.

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