NUCLEOSYNTHESIS DURING THE MERGER OF WHITE DWARFS AND THE ORIGIN OF R CORONAE BOREALIS STARS
Many hydrogen-deficient stars are characterized by surface abundance patterns that are hard to reconcile with conventional stellar evolution. Instead, it has been suggested that they may represent the result of a merger episode between a helium and a carbon-oxygen white dwarf. In this Letter, we pre...
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| Veröffentlicht in: | Astrophysical journal. Letters 2011-08, Vol.737 (2), p.L34-jQuery1323916199583='48' |
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| container_title | Astrophysical journal. Letters |
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| creator | Longland, R. Lorén-Aguilar, P. José, J. García-Berro, E. Althaus, L. G. Isern, J. |
| description | Many hydrogen-deficient stars are characterized by surface abundance patterns that are hard to reconcile with conventional stellar evolution. Instead, it has been suggested that they may represent the result of a merger episode between a helium and a carbon-oxygen white dwarf. In this Letter, we present a nucleosynthesis study of the merger of a 0.4 M helium white dwarf with a 0.8 M carbon-oxygen white dwarf, by coupling the thermodynamic history of Smoothed Particle Hydrodynamics particles with a post-processing code. The resulting chemical abundance pattern, particularly for oxygen and fluorine, is in qualitative agreement with the observed abundances in R Coronae Borealis stars. |
| doi_str_mv | 10.1088/2041-8205/737/2/L34 |
| format | Article |
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The resulting chemical abundance pattern, particularly for oxygen and fluorine, is in qualitative agreement with the observed abundances in R Coronae Borealis stars.</description><subject>AGB stars</subject><subject>Astronomia i astrofísica</subject><subject>Asymptotic giant branch</subject><subject>Cosmologia i cosmogonia</subject><subject>Física</subject><subject>Nanes blanques</subject><subject>White dwarf stars</subject><subject>Àrees temàtiques de la UPC</subject><issn>2041-8205</issn><issn>2041-8213</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><sourceid>XX2</sourceid><recordid>eNpFkF9LwzAUxYsoOKefwJe8-TR7kzRd-li3rCvUFtKNIQghpglMNqvN9uC3t3VDHy73z7nnPPyC4B7DIwbOQwIRnnACLJzSaUjCgkYXweh8xfTybwZ2Hdx4_w5AIMZ8FLyW61khqvqlXC1FnddovpZ5maF-Q89CZkKiaoE2y3wl0HyTykWN0nL-K1cyz_JykCWaVbIqU4GeKinSoo-pV6msb4Mrp3fe3p37OFgvxGq2nBRVls_SYmJozA8TE2lCWGMhjjV_M46TqW6ihCUMWNKYaLhAEjFoOGeOcee0TWLssItxxJ2l4wCfco0_GtVZYzujD6rV2_9lKAJTonDCCE16z8PJ89m1X0frD2q_9cbudvrDtkevEgIcYqBR_0nP6V3rfWed-uy2e919KwxqwK8GuGqAq3r8iqgeP_0BzzxvMQ</recordid><startdate>20110820</startdate><enddate>20110820</enddate><creator>Longland, R.</creator><creator>Lorén-Aguilar, P.</creator><creator>José, J.</creator><creator>García-Berro, E.</creator><creator>Althaus, L. 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Letters</jtitle><date>2011-08-20</date><risdate>2011</risdate><volume>737</volume><issue>2</issue><spage>L34</spage><epage>jQuery1323916199583='48'</epage><pages>L34-jQuery1323916199583='48'</pages><issn>2041-8205</issn><eissn>2041-8213</eissn><abstract>Many hydrogen-deficient stars are characterized by surface abundance patterns that are hard to reconcile with conventional stellar evolution. Instead, it has been suggested that they may represent the result of a merger episode between a helium and a carbon-oxygen white dwarf. In this Letter, we present a nucleosynthesis study of the merger of a 0.4 M helium white dwarf with a 0.8 M carbon-oxygen white dwarf, by coupling the thermodynamic history of Smoothed Particle Hydrodynamics particles with a post-processing code. 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| source | IOP Publishing Free Content; Recercat; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; IOPscience extra; Alma/SFX Local Collection |
| subjects | AGB stars Astronomia i astrofísica Asymptotic giant branch Cosmologia i cosmogonia Física Nanes blanques White dwarf stars Àrees temàtiques de la UPC |
| title | NUCLEOSYNTHESIS DURING THE MERGER OF WHITE DWARFS AND THE ORIGIN OF R CORONAE BOREALIS STARS |
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