Massive stars in the Sagittarius Dwarf Irregular Galaxy
Solar and Stellar Astrophysics
2017-12-01 v1 Astrophysics of Galaxies
Abstract
Low metallicity massive stars hold the key to interpret numerous processes in the past Universe including re-ionization, starburst galaxies, high-redshift supernovae and GRBs. The Sagittarius Dwarf Irregular Galaxy (SagDIG, 12+log(O/H)=7.37) represents an important landmark in the quest for analogues accessible with 10-m class telescopes. This paper presents low-resolution spectroscopy executed with the Gran Telescopio Canarias that confirms that SagDIG hosts massive stars. The observations unveiled three OBA-type stars and one red supergiant candidate. Pending confirmation from high-resolution follow-up studies, these could be the most metal-poor massive stars of the Local Group.
Cite
@article{arxiv.1711.11299,
title = {Massive stars in the Sagittarius Dwarf Irregular Galaxy},
author = {Miriam Garcia},
journal= {arXiv preprint arXiv:1711.11299},
year = {2017}
}
Comments
Accepted for publication at MNRAS-Letters