https://doi.org/10.1051/epjconf/202429702004
Tracing the origin of neutron-capture elements in the metalpoor star HE 1244-3036
1 Indian Institute of Astrophysics, Koramangala, Bangalore 560034, India
2 Indian Institute of Technology Palakkad, Kanjikode, 678623, Kerala, India
* e-mail: debasishdutta1707@gmail.com
** e-mail: aruna@iiap.res.in
Published online: 7 June 2024
We present results from a detailed abundance analysis of a star HE 1244-3036, based on a high resolution (R ∼ 50000) SUBARU/HDS spectrum. The wavelength coverage is from 3510 to 5310 Å. Our estimated metallicity [Fe/H] ∼ −2.5 and carbon abundance ([C/Fe] = 1.06) show that the object belongs to the group of carbon-enhanced metal-poor (CEMP) stars. The location of the star in the Hertzsprung-Russell diagram indicates that the evolutionary phase of the object is the first giant branch. The observed enhancement of the heavy elements is, therefore likely extrinsic in nature. In order to understand the origin of the enhanced abundances of the heavy elements, we have performed a detailed comparison of the observed abundances with theoretical s-process model predictions which shows that the observed abundances can be explained with mass transfer from a companion AGB star with metallicity, z = 0.00005, and mass M = 2M⊙.
© The Authors, published by EDP Sciences, 2024
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
