Outliers: multicolour photometry guiding the search for evolved binary systems in the globular cluster 47 Tucanae
Solar and Stellar Astrophysics
2018-09-24 v2 Astrophysics of Galaxies
Abstract
We use Hubble Space Telescope multicolour photometry of the globular cluster 47 Tucanae to uncover a population of 24 objects with no previous classification that are outliers from the single-star model tracks in the colour-magnitude diagram and yet are likely cluster members. By comparing those sources with evolutionary models and X-ray source catalogues, we were able to show that the majority of those sources are likely binary systems that do not have any X-ray source detected nearby, most possibly formed by a white dwarf and a main-sequence star and a small number of possible double-degenerate systems.
Keywords
Cite
@article{arxiv.1809.07746,
title = {Outliers: multicolour photometry guiding the search for evolved binary systems in the globular cluster 47 Tucanae},
author = {Fabiola Campos and I. Pelisoli and S. Kamann and T. -O. Husser and S. Dreizler and A. Bellini and E. L. Robinson and D. Nardiello and G. Piotto and S. O. Kepler and A. G. Istrate and D. E. Winget and M. H. Montgomery and A. Dotter},
journal= {arXiv preprint arXiv:1809.07746},
year = {2018}
}
Comments
13 pages, 8 figures, 2 tables. Accepted for publication in MNRAS on September 18, 2018