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Aruna Goswami, Jameela Shejeelammal, Partha Pratim Goswami & Meenakshi Purandardas

On the potential of Carbon-Enhanced Metal-poor Stars for Galactic Archaeology

(Volume 93 - Année 2024 — No 2 - Proceeedings of the 3rd BINA Workshop on the Scientific Potential of the Indo-Belgian Cooperation)
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Abstract

The low-mass metal-poor stars in the Galaxy that preserve in their atmosphere, the chemical imprints of the gas clouds from which they were formed can be used as probes to get insight into the origin and evolution of elements in the early galaxy, early star formation and nucleosynthesis. Among the metal-poor stars, a large fraction, the so-called carbon-enhanced metal-poor (CEMP) stars exhibits high abundance of carbon. These stars exhibit diverse abundance patterns, particularly for heavy elements, based on which they are classified into different groups. The diversity of abundance patterns points at different formation scenarios. Hence, accurate classification of CEMP stars and knowledge of their distribution is essential to understand the role and contribution of each group. While CEMP-s and CEMP-r/s stars can be used to get insight into binary interactions at very low metallicity, CEMP-no stars can be used to probe the properties of the first stars and early nucleosynthesis. To exploit the full potential of CEMP stars for Galactic archaeology a homogeneous analysis of each class is extremely important. Our efforts towards, and contributions to providing an improved classification scheme for accurate classification of CEMP-s and CEMP-r/s stars and in characterizing the companion asymptotic giant branch (AGB) stars of CH, CEMP-no, CEMP-s and CEMP-r/s binary systems are discussed. Some recent results obtained based on low- and high-resolution spectroscopic analysis of a large number of potential CH and CEMP star candidates are highlighted.

Keywords : Metal-Poor stars, Carbon stars, Nucleosynthesis, Abundances

To cite this article

Aruna Goswami, Jameela Shejeelammal, Partha Pratim Goswami & Meenakshi Purandardas, «On the potential of Carbon-Enhanced Metal-poor Stars for Galactic Archaeology», Bulletin de la Société Royale des Sciences de Liège [En ligne], Volume 93 - Année 2024, No 2 - Proceeedings of the 3rd BINA Workshop on the Scientific Potential of the Indo-Belgian Cooperation, 406-429 URL : https://popups.ulg.ac.be/0037-9565/index.php?id=11730.

About: Aruna Goswami

Indian Institute of Astrophysics, Koramangala, Bangalore 560034, India. Corresponding author: aruna@iiap.res.in

About: Jameela Shejeelammal

Indian Institute of Astrophysics, Koramangala, Bangalore 560034, India and Universidade de Sao Paulo, Instituto de Astronomia, Rua do Matao 1226, Cidade Universitaria, 05508-900, SP, Brazil

About: Partha Pratim Goswami

Indian Institute of Astrophysics, Koramangala, Bangalore 560034, India

About: Meenakshi Purandardas

Indian Institute of Astrophysics, Koramangala, Bangalore 560034, India