Asteroseismology of GD358 with complex core carbon and oxygen profiles

Agnès Bischoff-Kim; Judith L. Provencal

doi:10.1017/S1743921316005950

Asteroseismology of GD358 with complex core carbon and oxygen profiles

Agnès Bischoff-Kim, Judith L. Provencal

Penn State Scranton

Research output: Contribution to journal › Article › peer-review

Abstract

GD 358 is the brightest (m v=13.7) and best studied helium atmosphere white dwarf pulsator. We present an analysis based on over 1000 hours of observations spanning 2007-2014 as well as archival data going back to 1982. From the complete data set, we identify a total of 27 independent frequencies and fit 14 of them as m=0 modes in our asteroseismic analysis. We add GD358 to a set of helium atmosphere white dwarfs fitted with similar models. With this consistent set, we can see a trend in the thickness of the pure helium layer that are quantitatively consistent with time-dependent diffusion calculations.

Original language	English (US)
Pages (from-to)	489-492
Number of pages	4
Journal	Proceedings of the International Astronomical Union
Volume	11
Issue number	A29B
DOIs	https://doi.org/10.1017/S1743921316005950
State	Published - 2015

All Science Journal Classification (ASJC) codes

Medicine (miscellaneous)
Astronomy and Astrophysics
Nutrition and Dietetics
Public Health, Environmental and Occupational Health
Space and Planetary Science

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title = "Asteroseismology of GD358 with complex core carbon and oxygen profiles",

abstract = "GD 358 is the brightest (m v=13.7) and best studied helium atmosphere white dwarf pulsator. We present an analysis based on over 1000 hours of observations spanning 2007-2014 as well as archival data going back to 1982. From the complete data set, we identify a total of 27 independent frequencies and fit 14 of them as m=0 modes in our asteroseismic analysis. We add GD358 to a set of helium atmosphere white dwarfs fitted with similar models. With this consistent set, we can see a trend in the thickness of the pure helium layer that are quantitatively consistent with time-dependent diffusion calculations.",

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language = "English (US)",

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AU - Bischoff-Kim, Agnès

AU - Provencal, Judith L.

N1 - Publisher Copyright: © International Astronomical Union 2016.

PY - 2015

Y1 - 2015

N2 - GD 358 is the brightest (m v=13.7) and best studied helium atmosphere white dwarf pulsator. We present an analysis based on over 1000 hours of observations spanning 2007-2014 as well as archival data going back to 1982. From the complete data set, we identify a total of 27 independent frequencies and fit 14 of them as m=0 modes in our asteroseismic analysis. We add GD358 to a set of helium atmosphere white dwarfs fitted with similar models. With this consistent set, we can see a trend in the thickness of the pure helium layer that are quantitatively consistent with time-dependent diffusion calculations.

AB - GD 358 is the brightest (m v=13.7) and best studied helium atmosphere white dwarf pulsator. We present an analysis based on over 1000 hours of observations spanning 2007-2014 as well as archival data going back to 1982. From the complete data set, we identify a total of 27 independent frequencies and fit 14 of them as m=0 modes in our asteroseismic analysis. We add GD358 to a set of helium atmosphere white dwarfs fitted with similar models. With this consistent set, we can see a trend in the thickness of the pure helium layer that are quantitatively consistent with time-dependent diffusion calculations.

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JF - Proceedings of the International Astronomical Union

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ER -

Asteroseismology of GD358 with complex core carbon and oxygen profiles

Abstract

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