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
• Authors: S. D. Kawaler; M. S. O'Brien; J. C. Clemens; R. E. Nather; D. E. Winget; T. K. Watson; K. Yanagida; J. S. Dixson; P. A. Bradley; M. A. Wood; D. J. Sullivan; S. J. Kleinman; E. Meistas; E. M. Leibowitz; P. Moskalik; S. Zola; G. Pajdosz; J. Krzesinski; J.-E. Solheim; A. Bruvold; D. O'Donoghue; M. Katz; G. Vauclair; N. Dolez; M. Chevreton; M. A. Barstow; A. Kanaan; S. O. Kepler; O. Giovannini; J. L. Provencal; C. J. Hansen

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)