Two white dwarfs with oxygen-rich atmospheres

B. T. Gänsicke; D. Koester; J. Girven; Thomas R. Marsh; D. Steeghs

doi:10.1126/science.1180228

Two white dwarfs with oxygen-rich atmospheres

B. T. Gänsicke, D. Koester, J. Girven, Thomas R. Marsh, D. Steeghs

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Abstract

Stars with masses ranging from 7 to 10 times the mass of the Sun end their lives either as massive white dwarfs or weak type II supernovae, but there are only limited observational constraints on either evolutionary channel. Here we report the detection of two white dwarfs with large photospheric oxygen abundances, implying that they are bare oxygen-neon cores and that they may have descended from the most massive progenitors that avoid core collapse.

Original language	English
Pages (from-to)	188-190
Number of pages	3
Journal	Science
Volume	327
Issue number	5962
DOIs	https://doi.org/10.1126/science.1180228
Publication status	Published - 2010
Externally published	Yes

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title = "Two white dwarfs with oxygen-rich atmospheres",

abstract = "Stars with masses ranging from 7 to 10 times the mass of the Sun end their lives either as massive white dwarfs or weak type II supernovae, but there are only limited observational constraints on either evolutionary channel. Here we report the detection of two white dwarfs with large photospheric oxygen abundances, implying that they are bare oxygen-neon cores and that they may have descended from the most massive progenitors that avoid core collapse.",

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T1 - Two white dwarfs with oxygen-rich atmospheres

AU - Gänsicke, B. T.

AU - Koester, D.

AU - Girven, J.

AU - Marsh, Thomas R.

AU - Steeghs, D.

PY - 2010

Y1 - 2010

N2 - Stars with masses ranging from 7 to 10 times the mass of the Sun end their lives either as massive white dwarfs or weak type II supernovae, but there are only limited observational constraints on either evolutionary channel. Here we report the detection of two white dwarfs with large photospheric oxygen abundances, implying that they are bare oxygen-neon cores and that they may have descended from the most massive progenitors that avoid core collapse.

AB - Stars with masses ranging from 7 to 10 times the mass of the Sun end their lives either as massive white dwarfs or weak type II supernovae, but there are only limited observational constraints on either evolutionary channel. Here we report the detection of two white dwarfs with large photospheric oxygen abundances, implying that they are bare oxygen-neon cores and that they may have descended from the most massive progenitors that avoid core collapse.

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DO - 10.1126/science.1180228

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VL - 327

SP - 188

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JO - Science

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ER -

Two white dwarfs with oxygen-rich atmospheres

Abstract

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