Seismological studies of ZZ Ceti stars - II. Application to the ZZ Ceti class
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Data
2009
Abstract
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 re
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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Artigos de Periódicos (40361)Ciências Exatas e da Terra (6164)
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