Work

Abundance anomalies in low-mass field mergers as evidence of a merger origin for the second-generation stars in globular clusters

Year: 2025

Type: article

Abstract: Context. The canonical formation of second-generation (G2) stars in globular clusters (GCs) from gas enriched and ejected by G1 (primordial) polluters faces substantial challenges, namely (i) a mass-budget problem and (ii) uncertainty in the source(s) of the abundance anomaly of light elements (AALE) in G2 stars. The merger of G1 low-mass main-sequence (MS) binaries can overcome (i), but its ability to result in AALE remains unverified. Aims. We present evidence of the merger process to explain AALE, based on highly probable merger remnants in the Galactic disc. Methods. We focus on carbon-deficient red clump giants with low masses of 1.0 M⊙

Source: Springer Link (Chiba Institute of Technology)

DOI: 10.1051/0004-6361/202556481/pdf

Authors: V. Kravtsov, S. Dib, F. Calderon

Institutions: Lomonosov Moscow State University, Max Planck Institute for Astronomy, Universidad Católica del Norte

Language: English

Topic: Stellar, planetary, and galactic studies

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funder: Lomonosov Moscow State University

OpenAlex ID: W7110930450

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