Whole Earth Telescope Observations and Seismological Analysis of the Pre--White Dwarf PG 2131+066

DOI: 10.1086/176145 Publication Date: 2002-07-26T18:38:08Z
ABSTRACT
view Abstract Citations (71) References (15) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Whole Earth Telescope Observations and Seismological Analysis of the Pre--White Dwarf PG 2131+066 Kawaler, S. D. ; O'Brien, M. Clemens, J. C. Nather, R. E. Winget, Watson, T. K. Yanagida, Dixson, Bradley, P. A. Wood, Sullivan, Kleinman, Meistas, Leibowitz, Moskalik, Zola, Pajdosz, G. Krzesinski, Solheim, -E. Bruvold, O'Donoghue, Katz, Vauclair, Dolez, N. Chevreton, Barstow, Kanaan, Kepler, O. Giovannini, Provencal, L. Hansen, As transition objects between asymptotic giant branch (AGB) cooling white dwarfs, 1159 stars are key for understanding late stages stellar evolution. The pulsations exhibited by many members spectral class provide a mechanism ferreting out this information. We present an analysis pulsation spectrum naked star 2131+066, which we completely resolve using data from (WET). shows patterns that expected theory; comparison these with theoretical models indicate 2131 has mass 0.61±0.02 Msun, luminosity log (L/Lsun) = 1.0±0.2 it lies at distance 470+180-130 pc. It rotates period 5.1 hr evidence discontinuity in composition approximately 6 × 10-3 3M* below surface. Certain modes show complex structure power spectrum, while others measurable frequency changes 8 years. Fine prograde (m -1) suggests presence nonlinear effects. Publication: Astrophysical Journal Pub Date: September 1995 DOI: 10.1086/176145 Bibcode: 1995ApJ...450..350K Keywords: STARS: FUNDAMENTAL PARAMETERS; INDIVIDUAL ALPHANUMERIC: 2131+066; OSCILLATIONS; WHITE DWARFS full text sources ADS | products SIMBAD (5)
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