Work

RMC 40 in eruptive phase: CNO and rare-earth elements

Year: 2024

Type: article

Abstract: Using high-resolution optical and infrared spectra of the LBV star in the Small Magellanic Cloud, RMC 40, obtained during the eruptive phase, we determined chemical abundances of the light (CNO) and rare-earth elements. We found strong decrease in carbon abundance and strong enhancement in nitrogen abundance. The abundances of the s- and r-process elements, such as Ba, La, Ce, Pr, Nd, and Dy, are increased compared to solar-scaled values by +(0.60 - 1.0) dex, pointing to strong pollution of the stellar envelope (pseudo-photosphere) by the products of the CNO cycle and the r- and s-processes.

Source: Zenodo (CERN European Organization for Nuclear Research)

DOI: 10.5281/zenodo.13862195

Authors: Drake, Natalia, Borges Fernandes, Marcelo, Campagnolo, Julio C.N., Kraus, Michaela, Pereira, Claudio B., Guerrero, Carlos Alberto, de Almeida, K.P.R., de Almeida, Elisson S. G.

Institutions: National Observatory, Ministry of Science, Technology and Innovation, Federal Center for Technological Education Celso Suckow da Fonseca, Czech Academy of Sciences, Czech Academy of Sciences, Astronomical Institute, Universidad Autónoma de Nuevo León, University of Valparaíso

Language: English

Topic: Stellar, planetary, and galactic studies

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W6949320905

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