The composition of Barium stars and the s-process in AGB stars

Borbála Cseh; Maria Lugaro; Valentina D'Orazi; Denise B. De Castro; Claudio B. Pereira; Amanda I. Karakas; László Molnár; Emese Plachy; Róbert Szabó; Marco Pignatari; Sergio Cristallo

doi:10.1017/S1743921318005100

The composition of Barium stars and the s-process in AGB stars

Borbála Cseh, Maria Lugaro, Valentina D'Orazi, Denise B. De Castro, Claudio B. Pereira, Amanda I. Karakas, László Molnár, Emese Plachy, Róbert Szabó, Marco Pignatari, Sergio Cristallo

School of Physics and Astronomy

Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › Research

Abstract

Using abundances from the available largest, homogeneous sample of high resolution Barium (Ba) star spectra we calculated the ratios of different hs-like to ls-like elemental ratios and compared to different AGB nucleosynthesis models. The Ba star data show an incontestable increase of the hs-type/ls-type element ratio (for example, [Ce/Y]) with decreasing metallicity. This trend in the Ba star observations is predicted by low mass, non-rotating AGB models where ¹³C is the main neutron source and is in agreement with Kepler asteroseismology observations.

Original language	English
Title of host publication	Proceedings of the International Astronomical Union
Editors	Franz Kerschbaum, Martin Groenewegen, Hans Olofsson
Place of Publication	United Kingdom
Publisher	Cambridge University Press
Pages	89-92
Number of pages	4
Volume	14
Edition	S343
ISBN (Print)	9781108471527
DOIs	https://doi.org/10.1017/S1743921318005100
Publication status	Published - 30 Dec 2019
Event	International Astronomical Union: Why Galaxies Care About AGB Stars: A Continuing Challenge through Cosmic Time - Vienna, Austria Duration: 20 Aug 2018 → 23 Aug 2018 Conference number: 343 https://www.univie.ac.at/galagb/s343/

Publication series

Name	Proceedings of the International Astronomical Union
Publisher	Cambridge University Press
ISSN (Print)	1743-9213

Conference

Conference	International Astronomical Union
Country/Territory	Austria
City	Vienna
Period	20/08/18 → 23/08/18
Internet address	https://www.univie.ac.at/galagb/s343/

Keywords

abundances
nuclear reactions
nucleosynthesis
Stars: Abundances
stars: AGB and post-AGB

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1017/S1743921318005100Licence: CC BY

Cite this

Cseh, B., Lugaro, M., D'Orazi, V., De Castro, D. B., Pereira, C. B., Karakas, A. I., Molnár, L., Plachy, E., Szabó, R., Pignatari, M., & Cristallo, S. (2019). The composition of Barium stars and the s-process in AGB stars. In F. Kerschbaum, M. Groenewegen, & H. Olofsson (Eds.), Proceedings of the International Astronomical Union (S343 ed., Vol. 14, pp. 89-92). (Proceedings of the International Astronomical Union). Cambridge University Press. https://doi.org/10.1017/S1743921318005100

Cseh, Borbála ; Lugaro, Maria ; D'Orazi, Valentina et al. / The composition of Barium stars and the s-process in AGB stars. Proceedings of the International Astronomical Union. editor / Franz Kerschbaum ; Martin Groenewegen ; Hans Olofsson. Vol. 14 S343. ed. United Kingdom : Cambridge University Press, 2019. pp. 89-92 (Proceedings of the International Astronomical Union).

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abstract = "Using abundances from the available largest, homogeneous sample of high resolution Barium (Ba) star spectra we calculated the ratios of different hs-like to ls-like elemental ratios and compared to different AGB nucleosynthesis models. The Ba star data show an incontestable increase of the hs-type/ls-type element ratio (for example, [Ce/Y]) with decreasing metallicity. This trend in the Ba star observations is predicted by low mass, non-rotating AGB models where 13C is the main neutron source and is in agreement with Kepler asteroseismology observations.",

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Cseh, B, Lugaro, M, D'Orazi, V, De Castro, DB, Pereira, CB, Karakas, AI, Molnár, L, Plachy, E, Szabó, R, Pignatari, M & Cristallo, S 2019, The composition of Barium stars and the s-process in AGB stars. in F Kerschbaum, M Groenewegen & H Olofsson (eds), Proceedings of the International Astronomical Union. S343 edn, vol. 14, Proceedings of the International Astronomical Union, Cambridge University Press, United Kingdom, pp. 89-92, International Astronomical Union, Vienna, Austria, 20/08/18. https://doi.org/10.1017/S1743921318005100

The composition of Barium stars and the s-process in AGB stars. / Cseh, Borbála; Lugaro, Maria; D'Orazi, Valentina et al.
Proceedings of the International Astronomical Union. ed. / Franz Kerschbaum; Martin Groenewegen; Hans Olofsson. Vol. 14 S343. ed. United Kingdom: Cambridge University Press, 2019. p. 89-92 (Proceedings of the International Astronomical Union).

Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › Research

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AU - Cseh, Borbála

AU - Lugaro, Maria

AU - D'Orazi, Valentina

AU - De Castro, Denise B.

AU - Pereira, Claudio B.

AU - Karakas, Amanda I.

AU - Molnár, László

AU - Plachy, Emese

AU - Szabó, Róbert

AU - Pignatari, Marco

AU - Cristallo, Sergio

N1 - Conference code: 343

PY - 2019/12/30

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AB - Using abundances from the available largest, homogeneous sample of high resolution Barium (Ba) star spectra we calculated the ratios of different hs-like to ls-like elemental ratios and compared to different AGB nucleosynthesis models. The Ba star data show an incontestable increase of the hs-type/ls-type element ratio (for example, [Ce/Y]) with decreasing metallicity. This trend in the Ba star observations is predicted by low mass, non-rotating AGB models where 13C is the main neutron source and is in agreement with Kepler asteroseismology observations.

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KW - nuclear reactions

KW - nucleosynthesis

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T3 - Proceedings of the International Astronomical Union

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BT - Proceedings of the International Astronomical Union

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A2 - Olofsson, Hans

PB - Cambridge University Press

CY - United Kingdom

T2 - International Astronomical Union

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ER -

Cseh B, Lugaro M, D'Orazi V, De Castro DB, Pereira CB, Karakas AI et al. The composition of Barium stars and the s-process in AGB stars. In Kerschbaum F, Groenewegen M, Olofsson H, editors, Proceedings of the International Astronomical Union. S343 ed. Vol. 14. United Kingdom: Cambridge University Press. 2019. p. 89-92. (Proceedings of the International Astronomical Union). doi: 10.1017/S1743921318005100

The composition of Barium stars and the s-process in AGB stars

Abstract

Publication series

Conference

Keywords

UN SDGs

Access to Document

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