Lithium production in SAGB stars

Herbert H B Lau, Carolyn L. Doherty, Pilar Gil-Pons, John C. Lattanzio

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearch

1 Citation (Scopus)

Abstract

We explore the production of and stellar yields of 7Li for a range of mass and metallicity. We test the effect of varying the mass loss rate and well as the mixing length parameter on the production of lithium. There is a short duration of strong enhancement of Lithium in the early AGB phase, before any thermal pulses. Higher mass-loss rate, particularly in the early AGB phase, will result in stronger Li enhancement. In general, metal-poor stars produce less lithium because the mass-loss rates are lower during the Li-rich phase. We also compare the observed abundances of Li-rich stars with our models and discuss possible formation of Li-rich stars through mass transfer from SAGB primary. If a SAGB star is observed before thermal pulses or the SAGB primary evolution truncated before thermal pulses due to binary interactions, then the observed SAGB stars or its companion may be observed as Li-rich but without s-process isotopes.

Original languageEnglish
Title of host publicationMemorie della Societa Astronomica Italiana, Supplementi - Journal of the Italian Astronomical Society, Supplement
Subtitle of host publicationLithium in the Cosmos; Paris; France; 27 February 2012 through 29 February 2012; Code 110336
EditorsF Iocco, P Bonifacio, E Vangioni
Place of PublicationFlorence Italy
PublisherItalian Astronomical Society (SAIt)
Pages247-254
Number of pages8
Volume22
Publication statusPublished - 2012
EventLithium in the Cosmos 2012 - Institut d'Astrophysique de Paris, Paris, France
Duration: 27 Feb 201229 Feb 2012
http://www.iap.fr/vie_scientifique/ateliers/lithiuminthecosmos2012/index.html

Publication series

NameMemorie della Societa Astronomica Italiana, Supplementi [Journal of the Italian Astronomical Society, Supplement]
PublisherSocieta Astronomica Italiana [Italian Astronomical Society (SAIt)]
Volume22
ISSN (Print)0037-8720

Conference

ConferenceLithium in the Cosmos 2012
CountryFrance
CityParis
Period27/02/1229/02/12
OtherMonash researcher confirmed that the conference papers were not peer reviewed
Internet address

Keywords

  • AGB and post-AGB-evolution-binaries
  • Stars

Cite this

Lau, H. H. B., Doherty, C. L., Gil-Pons, P., & Lattanzio, J. C. (2012). Lithium production in SAGB stars. In F. Iocco, P. Bonifacio, & E. Vangioni (Eds.), Memorie della Societa Astronomica Italiana, Supplementi - Journal of the Italian Astronomical Society, Supplement: Lithium in the Cosmos; Paris; France; 27 February 2012 through 29 February 2012; Code 110336 (Vol. 22, pp. 247-254). (Memorie della Societa Astronomica Italiana, Supplementi [Journal of the Italian Astronomical Society, Supplement]; Vol. 22). Florence Italy: Italian Astronomical Society (SAIt).
Lau, Herbert H B ; Doherty, Carolyn L. ; Gil-Pons, Pilar ; Lattanzio, John C. / Lithium production in SAGB stars. Memorie della Societa Astronomica Italiana, Supplementi - Journal of the Italian Astronomical Society, Supplement: Lithium in the Cosmos; Paris; France; 27 February 2012 through 29 February 2012; Code 110336. editor / F Iocco ; P Bonifacio ; E Vangioni. Vol. 22 Florence Italy : Italian Astronomical Society (SAIt), 2012. pp. 247-254 (Memorie della Societa Astronomica Italiana, Supplementi [Journal of the Italian Astronomical Society, Supplement]).
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abstract = "We explore the production of and stellar yields of 7Li for a range of mass and metallicity. We test the effect of varying the mass loss rate and well as the mixing length parameter on the production of lithium. There is a short duration of strong enhancement of Lithium in the early AGB phase, before any thermal pulses. Higher mass-loss rate, particularly in the early AGB phase, will result in stronger Li enhancement. In general, metal-poor stars produce less lithium because the mass-loss rates are lower during the Li-rich phase. We also compare the observed abundances of Li-rich stars with our models and discuss possible formation of Li-rich stars through mass transfer from SAGB primary. If a SAGB star is observed before thermal pulses or the SAGB primary evolution truncated before thermal pulses due to binary interactions, then the observed SAGB stars or its companion may be observed as Li-rich but without s-process isotopes.",
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Lau, HHB, Doherty, CL, Gil-Pons, P & Lattanzio, JC 2012, Lithium production in SAGB stars. in F Iocco, P Bonifacio & E Vangioni (eds), Memorie della Societa Astronomica Italiana, Supplementi - Journal of the Italian Astronomical Society, Supplement: Lithium in the Cosmos; Paris; France; 27 February 2012 through 29 February 2012; Code 110336. vol. 22, Memorie della Societa Astronomica Italiana, Supplementi [Journal of the Italian Astronomical Society, Supplement], vol. 22, Italian Astronomical Society (SAIt), Florence Italy, pp. 247-254, Lithium in the Cosmos 2012, Paris, France, 27/02/12.

Lithium production in SAGB stars. / Lau, Herbert H B; Doherty, Carolyn L.; Gil-Pons, Pilar; Lattanzio, John C.

Memorie della Societa Astronomica Italiana, Supplementi - Journal of the Italian Astronomical Society, Supplement: Lithium in the Cosmos; Paris; France; 27 February 2012 through 29 February 2012; Code 110336. ed. / F Iocco; P Bonifacio; E Vangioni. Vol. 22 Florence Italy : Italian Astronomical Society (SAIt), 2012. p. 247-254 (Memorie della Societa Astronomica Italiana, Supplementi [Journal of the Italian Astronomical Society, Supplement]; Vol. 22).

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearch

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T1 - Lithium production in SAGB stars

AU - Lau, Herbert H B

AU - Doherty, Carolyn L.

AU - Gil-Pons, Pilar

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N2 - We explore the production of and stellar yields of 7Li for a range of mass and metallicity. We test the effect of varying the mass loss rate and well as the mixing length parameter on the production of lithium. There is a short duration of strong enhancement of Lithium in the early AGB phase, before any thermal pulses. Higher mass-loss rate, particularly in the early AGB phase, will result in stronger Li enhancement. In general, metal-poor stars produce less lithium because the mass-loss rates are lower during the Li-rich phase. We also compare the observed abundances of Li-rich stars with our models and discuss possible formation of Li-rich stars through mass transfer from SAGB primary. If a SAGB star is observed before thermal pulses or the SAGB primary evolution truncated before thermal pulses due to binary interactions, then the observed SAGB stars or its companion may be observed as Li-rich but without s-process isotopes.

AB - We explore the production of and stellar yields of 7Li for a range of mass and metallicity. We test the effect of varying the mass loss rate and well as the mixing length parameter on the production of lithium. There is a short duration of strong enhancement of Lithium in the early AGB phase, before any thermal pulses. Higher mass-loss rate, particularly in the early AGB phase, will result in stronger Li enhancement. In general, metal-poor stars produce less lithium because the mass-loss rates are lower during the Li-rich phase. We also compare the observed abundances of Li-rich stars with our models and discuss possible formation of Li-rich stars through mass transfer from SAGB primary. If a SAGB star is observed before thermal pulses or the SAGB primary evolution truncated before thermal pulses due to binary interactions, then the observed SAGB stars or its companion may be observed as Li-rich but without s-process isotopes.

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BT - Memorie della Societa Astronomica Italiana, Supplementi - Journal of the Italian Astronomical Society, Supplement

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Lau HHB, Doherty CL, Gil-Pons P, Lattanzio JC. Lithium production in SAGB stars. In Iocco F, Bonifacio P, Vangioni E, editors, Memorie della Societa Astronomica Italiana, Supplementi - Journal of the Italian Astronomical Society, Supplement: Lithium in the Cosmos; Paris; France; 27 February 2012 through 29 February 2012; Code 110336. Vol. 22. Florence Italy: Italian Astronomical Society (SAIt). 2012. p. 247-254. (Memorie della Societa Astronomica Italiana, Supplementi [Journal of the Italian Astronomical Society, Supplement]).