2021
DOI: 10.48550/arxiv.2109.03782
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High Mass-ratio Binary Population in Open Clusters: Segregation of early type binaries and an increasing binary fraction with mass

Vikrant V. Jadhav,
Kaustubh Roy,
Naman Joshi
et al.

Abstract: Binary stars play a vital role in astrophysical research, as a good fraction of stars are in binaries. Binary fraction (BF) is known to change with stellar mass in the Galactic field, but such studies in clusters require binary identification and membership information. Here, we estimate the total and spectral-type-wise high mass-ratio (HMR) BF (f 0.6 ) in 23 open clusters using unresolved binaries in color-magnitude diagrams using Gaia DR2 data. We introduce the segregation index (SI) parameter to trace mass … Show more

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