Preliminary asteroseismology of G29-38

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G 29-38 is a cool pulsating DA white dwarf with a series of modes from 110 s to over 1000 s found by Kleinman et al. Kleinman et al. present suggestive evidence that most of the modes they see are {ell}=l modes, but they could not prove this assertion with their data. the large number of modes (10 to 20) present in G 29-38 gives us hope that we can constrain the mode structure in the manner that Bradley & Winget use for the DBV GD 358. Here, we try to match the observed data with periods predicted from models ... continued below

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9 p.

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Bradley, P.A. & Kleinman, S.J. August 1, 1996.

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  • Bradley, P.A. Los Alamos National Lab., NM (United States)
  • Kleinman, S.J. McDonald Observatory, Austin, TX (United States). Dept. of Astronomy

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Description

G 29-38 is a cool pulsating DA white dwarf with a series of modes from 110 s to over 1000 s found by Kleinman et al. Kleinman et al. present suggestive evidence that most of the modes they see are {ell}=l modes, but they could not prove this assertion with their data. the large number of modes (10 to 20) present in G 29-38 gives us hope that we can constrain the mode structure in the manner that Bradley & Winget use for the DBV GD 358. Here, we try to match the observed data with periods predicted from models similar to those of Bradley. We present results of our attempts to find a seismological fit to G 29-38 using the data of Kleinman et al. and look for a model that identifies most of the observed modes as {ell}=l modes. G 29-38 has a discrepancy between the spectroscopically favored mass of about 0.70M{sub {circle_dot}} and the parallactic mass of about 0.80M{sub {circle_dot}}. We attempt to find models that are consistent with either mass determination and see if we can place constraints on the hydrogen layer mass with these assumptions. We also look for models that have hydrogen layer masses that have hydrogen layer masses near 10{sup -4}M{star}, consistent with the value Clemens suggests for the hotter DAV stars. We also look to see if other combinations of stellar mass and hydrogen layer mass are consistent with the observed data and explore their consequences.

Physical Description

9 p.

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OSTI as DE96012644

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  • 10. European white dwarf workshop, Blanes (Spain), 21 Jun 1996

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  • Other: DE96012644
  • Report No.: LA-UR--96-2101
  • Report No.: CONF-9606235--1
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 274207
  • Archival Resource Key: ark:/67531/metadc666328

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  • August 1, 1996

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  • June 29, 2015, 9:42 p.m.

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  • Feb. 26, 2016, 3:27 p.m.

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Bradley, P.A. & Kleinman, S.J. Preliminary asteroseismology of G29-38, article, August 1, 1996; New Mexico. (digital.library.unt.edu/ark:/67531/metadc666328/: accessed September 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.