GCIRS 7, a pulsating M1 supergiant at the Galactic centre - Physical properties and age
GCIRS 7, a pulsating M1 supergiant at the Galactic centre - Physical properties and age
Context. The stellar population in the central parsec of the Galaxy is dominated in mass and number by an old (several Gyr) population, but young (6 2 Myr), massive stars dominate the luminosity function. The most luminous of these stars is an M1 supergiant, GCIRS 7. Aims. We have studied …