FUSE Observations of ZZ Ceti Stars

Details FUSE Observations of ZZ Ceti Stars FUSE Observations of ZZ Ceti Stars

Aug 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005jrasc..99s.136d&link_type=abstract

Journal of the Royal Astronomical Society of Canada, Vol. 99, No. 4, p.136

Astronomy and Astrophysics

Astronomy

Scientific paper

We present FUSE observations of the brightest known ZZ Ceti stars, G226-29 and G185-32. These stars help define the blue edge of the ZZ Ceti instability strip in which hydrogen-rich white dwarfs are found to pulsate with period ranging from 100 to 1000 s. The spectra are detected between 1050 and 1180 Å and show strong absorption features due to quasi-molecular satellites of H2 and H2+ as well as an absorption feature at 1130 Å due to a resonance in the bound-free cross section of H'. We explore the potential of these features in helping constraint the stellar parameters for these two key white dwarfs.

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