The Effective Temperature Scale of Galactic Red Supergiants: Cool, but Not as Cool as We Thought
The Effective Temperature Scale of Galactic Red Supergiants: Cool, but Not as Cool as We Thought
We use moderate-resolution optical spectrophotometry and the new MARCS stellar atmosphere models to determine the effective temperatures of 74 Galactic red supergiants (RSGs). The stars are mostly members of OB associations or clusters with known distances, allowing a critical comparison with modern stellar evolutionary tracks. We find we can achieve …