Hostname: page-component-586b7cd67f-rcrh6 Total loading time: 0 Render date: 2024-11-22T16:08:49.825Z Has data issue: false hasContentIssue false
  • English
  • Français

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

Published online by Cambridge University Press:  30 December 2019

Borbála Cseh ,
Maria Lugaro ,
Valentina D’Orazi ,
Denise B. de Castro ,
Claudio B. Pereira ,
Amanda I. Karakas ,
László Molnár Open the ORCID record for László Molnár [Opens in a new window] ,
Emese Plachy ,
Róbert Szabó  and
Marco Pignatari
...Show all authors
Borbála Cseh
Affiliation:
Konkoly Observatory, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, H-1121 Budapest, Konkoly Thege M. út 15-17, Hungary email: [email protected]
Maria Lugaro
Affiliation:
Konkoly Observatory, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, H-1121 Budapest, Konkoly Thege M. út 15-17, Hungary email: [email protected] Monash Centre for Astrophysics, School of Physics and Astronomy, Monash University, VIC 3800, Australia
Valentina D’Orazi
Affiliation:
INAF Osservatorio Astronomico di Padova, Vicolo dellOsservatorio 5, 35122 Padova, Italy
Denise B. de Castro
Affiliation:
Department for Astrophysics, Nicolaus Copernicus Astronomical Centre of the Polish Academy of Sciences, 00-716 Warsaw, Poland
Claudio B. Pereira
Affiliation:
Observatorio Nacional, Rua General José Cristino, 77 Sao Cristovao, Rio de Janeiro, Brazil
Amanda I. Karakas
Affiliation:
Monash Centre for Astrophysics, School of Physics and Astronomy, Monash University, VIC 3800, Australia
László Molnár
Affiliation:
Konkoly Observatory, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, H-1121 Budapest, Konkoly Thege M. út 15-17, Hungary email: [email protected] MTA CSFK Lendület Near-Field Cosmology Research Group
Emese Plachy
Affiliation:
Konkoly Observatory, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, H-1121 Budapest, Konkoly Thege M. út 15-17, Hungary email: [email protected] MTA CSFK Lendület Near-Field Cosmology Research Group
Róbert Szabó
Affiliation:
Konkoly Observatory, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, H-1121 Budapest, Konkoly Thege M. út 15-17, Hungary email: [email protected] MTA CSFK Lendület Near-Field Cosmology Research Group
Marco Pignatari
Affiliation:
Konkoly Observatory, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, H-1121 Budapest, Konkoly Thege M. út 15-17, Hungary email: [email protected] E. A. Milne Centre for Astrophysics, Department of Physics & Mathematics, University of Hull, HU6 7RX, United Kingdom The NuGrid Collaboration, http://www.nugridstars.org Joint Institute for Nuclear Astrophysics - Center for the Evolution of the Elements, USA
Sergio Cristallo
Affiliation:
INAF, Osservatorio Astronomico d’Abruzzo, I-64100 Teramo, Italy INFN-Sezione di Perugia, I-06123 Perugia, Italy
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

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.

Keywords

stars: abundancesnuclear reactionsnucleosynthesisabundancesstars: AGB and post-AGB
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S343: Why Galaxies Care About AGB Stars: A Continuing Challenge through Cosmic Time , August 2018 , pp. 89 - 92
Copyright
© International Astronomical Union 2019 

References

Abia, C., Domínguez, I., Gallino, R., Busso, M., Masera, S., Straniero, O., de Laverny, P., Plez, B., and Isern, J.: 2002, ApJ 579, 817 CrossRefGoogle Scholar
Battino, U., Pignatari, M., Ritter, C., Herwig, F., Denisenkov, P., Den Hartogh, J. W., Trappitsch, R., Hirschi, R., Freytag, B., Thielemann, F., and Paxton, B.: 2016, ApJ 827, 30 CrossRefGoogle Scholar
Cristallo, S., Straniero, O., Piersanti, L., and Gobrecht, D.: 2015, ApJS 219, 40 CrossRefGoogle Scholar
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., submitted to A&AGoogle Scholar
de Castro, D. B., Pereira, C. B., Roig, F., Jilinski, E., Drake, N. A., Chavero, C., and Sales Silva, J. V.: 2016, MNRAS 459, 4299 CrossRefGoogle Scholar
Fishlock, C. K., Karakas, A. I., Lugaro, M., and Yong, D. : 2014, ApJ 797, 44 CrossRefGoogle Scholar
Hermes, J. J., Gänsicke, B. T., Kawaler, S. D., Greiss, S., Tremblay, P.-E., Gentile Fusillo, N. P., Raddi, R., Fanale, S. M., Bell, K. J., Dennihy, E., Fuchs, J. T., Dunlap, B. H., Clemens, J. C., Montgomery, M. H., Winget, D. E., Chote, P., Marsh, T. R., and Redfield, S. : 2017, ApJS 232, 23 CrossRefGoogle Scholar
Karakas, A. I. and Lugaro, M. : 2016, ApJ 825, 26 CrossRefGoogle Scholar
Pérez-Mesa, V., Zamora, O., Garc-a-Hernndez, D. A., Plez, B., Manchado, A., Karakas, A. I., and Lugaro, M. : 2017, A&A 606, A20 Google Scholar
Piersanti, L., Cristallo, S., and Straniero, O. : 2013, ApJ 774, 98 CrossRefGoogle Scholar