The DBV stars: Progress and problems

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The DB white dwarfs comprise the majority of the 20% or so of non-DA white dwarfs, and have effective temperatures between 11,000 K and 30,000 K. The hottest DBs define the cool end of the so called ``DB gap`` that lies between 30,000 K and 45,000 K; in this region, no helium atmosphere white dwarf is known. The existence of this gap presents a great puzzle concerning the origin and evolution of helium atmosphere white dwarfs. Asteroseismology of the DBV stars as a class will tell scientists what DBs just below the red edge of the DB gap are like. ... continued below

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10 p.

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Bradley, P. A. September 1995.

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The DB white dwarfs comprise the majority of the 20% or so of non-DA white dwarfs, and have effective temperatures between 11,000 K and 30,000 K. The hottest DBs define the cool end of the so called ``DB gap`` that lies between 30,000 K and 45,000 K; in this region, no helium atmosphere white dwarf is known. The existence of this gap presents a great puzzle concerning the origin and evolution of helium atmosphere white dwarfs. Asteroseismology of the DBV stars as a class will tell scientists what DBs just below the red edge of the DB gap are like. This, coupled with structural understanding of the pulsating PG 1159 stars, the interacting binary white dwarfs (IBWDs), and white dwarf evolution calculations should fill in the gaps of knowledge about the DB white dwarfs and their origins. Here, the author describes the current status of understanding of DBV white dwarf structure via asteroseismology, with an emphasis on what was learned through Whole Earth Telescope data.

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10 p.

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OSTI as DE96000029

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  • Whole earth telescope workshop, Ames, IA (United States), Jul 1995

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  • Other: DE96000029
  • Report No.: LA-UR--95-3005
  • Report No.: CONF-9507169--1
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 106604
  • Archival Resource Key: ark:/67531/metadc623785

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Office of Scientific & Technical Information Technical Reports

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  • September 1995

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  • June 16, 2015, 7:43 a.m.

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  • Dec. 7, 2015, 11:56 a.m.

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Bradley, P. A. The DBV stars: Progress and problems, article, September 1995; New Mexico. (digital.library.unt.edu/ark:/67531/metadc623785/: accessed October 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.