ItemArticle

High-resolution spectral analysis of three high-latitude carbon stars

Title
High-resolution spectral analysis of three high-latitude carbon stars
Creator
Purandardas, Meenakshi; Dutta, Debasish; Goswami, Aruna; Kartha, Sreeja S.
Description
We present the results of a detailed high-resolution spectroscopic analysis (SUBARU/HDS spectra, R 50 000) of three faint high-latitude carbon stars HE 1104 0957, HE 1205 0521, and HE 1244 3036. Our estimated metallicity for these objects is 2.96, 2.63, and 2.49, respectively. The surface chemical compositions of the objects are found to be characterised by enhanced carbon and heavy elements, such as Y, Ba, La, and Ce. Using the classification criteria for carbon-enhanced metal-poor (CEMP) stars the objects HE 1104 0957 and HE 1205 0521 could not be classified into any known CEMP sub-classes, whereas the object HE 1244 3036 is found to be likely a CEMP-s star. The observed abundance patterns in HE 1244 3036 are also found to match well with the yields of a 2 M AGB star with [Fe/H] = 2.50. Although our kinematic analysis indicates that the objects belong to the halo population, the elemental abundance ratios of HE 1104 0957 and HE 1205 0521 do not match well with those of typical halo objects. Estimated elemental abundances are presented, and kinematic properties of the stars are discussed. The Author(s), 2025.
Source
Publications of the Astronomical Society of Australia;Volume;42;Issue;;Article No.;e047;
Date
01-01-2025
Publisher
Cambridge University Press
Subject
Stars: abundances; stars: atmospheres; stars: carbon stars; stars: metal-poor
Coverage
Purandardas M., Department of Physics and Electronics, CHRIST (Deemed to Be University), Bangalore, India; Dutta D., Indian Institute of Astrophysics, Koramangala, Bangalore, India, Indian Institute of Technology, Kanjikode, Kerala, Palakkad, India; Goswami A., Indian Institute of Astrophysics, Koramangala, Bangalore, India, Institute of Frontier Science and Application, Bangalore, India; Kartha S.S., Department of Physics and Electronics, CHRIST (Deemed to Be University), Bangalore, India
Rights
All Open Access; Hybrid Gold Open Access
Relation
ISSN: 13233580;
Format
online
Language
English
Type
Article

Citation

Purandardas, Meenakshi; Dutta, Debasish; Goswami, Aruna; Kartha, Sreeja S., “High-resolution spectral analysis of three high-latitude carbon stars,” CHRIST (Deemed To Be University) Institutional Repository, accessed June 19, 2026, https://archives.christuniversity.in/items/show/22487.

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