Supernovae versus neutron star mergers as the major r-process sources

Y. Z. Qian

doi:10.1086/312659

Supernovae versus neutron star mergers as the major r-process sources

Y. Z. Qian

Physics and Astronomy (Twin Cities)

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113 Scopus citations

Abstract

I show that recent observations of r-process abundances in metal-poor stars are difficult to explain if neutron star mergers (NSMs) are the major r-process sources. In contrast, such observations and meteoritic data on ¹⁸²Hf and ¹²⁹I in the early solar system support a self-consistent picture of r-process enrichment by supernovae (SNe). While further theoretical studies of r-process production and enrichment are needed for both SNe and NSMs, I emphasize two possible direct observational tests of the SN r-process model: gamma rays from the decay of r-process nuclei in SN remnants and surface contamination of the companion by SN r-process ejecta in binaries.

Original language	English (US)
Pages (from-to)	L67-L70
Journal	Astrophysical Journal
Volume	534
Issue number	1 PART 2
DOIs	https://doi.org/10.1086/312659
State	Published - May 1 2000

Bibliographical note

Funding Information:
I thank Petr Vogel and Jerry Wasserburg for many discussions on the r-process. I am also grateful to the referee, Friedel Thielemann, for detailed criticisms that helped improve this Letter. This work was supported in part by the Department of Energy under grant DE-FG02-87ER40328.

Keywords

Galaxy: evolution
Nuclear reactions, nucleosynthesis, abundances
Stars: neutron
Supernovae: general

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title = "Supernovae versus neutron star mergers as the major r-process sources",

abstract = "I show that recent observations of r-process abundances in metal-poor stars are difficult to explain if neutron star mergers (NSMs) are the major r-process sources. In contrast, such observations and meteoritic data on 182Hf and 129I in the early solar system support a self-consistent picture of r-process enrichment by supernovae (SNe). While further theoretical studies of r-process production and enrichment are needed for both SNe and NSMs, I emphasize two possible direct observational tests of the SN r-process model: gamma rays from the decay of r-process nuclei in SN remnants and surface contamination of the companion by SN r-process ejecta in binaries.",

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note = "Funding Information: I thank Petr Vogel and Jerry Wasserburg for many discussions on the r-process. I am also grateful to the referee, Friedel Thielemann, for detailed criticisms that helped improve this Letter. This work was supported in part by the Department of Energy under grant DE-FG02-87ER40328.",

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N2 - I show that recent observations of r-process abundances in metal-poor stars are difficult to explain if neutron star mergers (NSMs) are the major r-process sources. In contrast, such observations and meteoritic data on 182Hf and 129I in the early solar system support a self-consistent picture of r-process enrichment by supernovae (SNe). While further theoretical studies of r-process production and enrichment are needed for both SNe and NSMs, I emphasize two possible direct observational tests of the SN r-process model: gamma rays from the decay of r-process nuclei in SN remnants and surface contamination of the companion by SN r-process ejecta in binaries.

AB - I show that recent observations of r-process abundances in metal-poor stars are difficult to explain if neutron star mergers (NSMs) are the major r-process sources. In contrast, such observations and meteoritic data on 182Hf and 129I in the early solar system support a self-consistent picture of r-process enrichment by supernovae (SNe). While further theoretical studies of r-process production and enrichment are needed for both SNe and NSMs, I emphasize two possible direct observational tests of the SN r-process model: gamma rays from the decay of r-process nuclei in SN remnants and surface contamination of the companion by SN r-process ejecta in binaries.

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KW - Supernovae: general

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ER -

Supernovae versus neutron star mergers as the major r-process sources

Abstract

Bibliographical note

Keywords

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