GCIRS 7, a pulsating M1 supergiant at the Galactic centre
GCIRS 7, a pulsating M1 supergiant at the Galactic centre
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.