Seismological studies of ZZ Ceti stars - II. Application to the ZZ Ceti class

Details Seismological studies of ZZ Ceti stars - II. Application to the ZZ Ceti class Seismological studies of ZZ Ceti stars - II. Application to the ZZ Ceti class

Jul 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009mnras.396.1709c&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 396, Issue 3, pp. 1709-1731.

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8

Stars: Individual: Zz Ceti Stars, Stars: Variables: Other, White Dwarfs

Scientific paper

We used the detected pulsation modes and adiabatic pulsation models to do seismology of the class of ZZ Ceti stars and measure the H layer mass for 83 stars. We found the surface hydrogen layer to be within the range 10-9.5 >= MH/M* >= 10-4, with an average of MH/M* = 10-6.3, which is thinner than the predicted value of MH/M* = 10-4, indicating that the stars lose more mass during their evolution than previously expected. These results are preliminary and do not include the possible effects of realistic C/O profiles on the fits.

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