Optical spectroscopy of 4U 1812-12. An ultra-compact X-ray binary seen through an H II region
The persistent low-luminosity neutron star X-ray binary 4U 1812-12 is a potential member of the scarce family of ultra-compact systems. We performed deep photometric and spectroscopic optical observations with the 10.4 m Gran Telescopio Canarias in order to investigate the chemical composition of the accreted plasma, which is a proxy for the donor
Armas Padilla, M. et al.
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2020