The Effective Temperature Scale of Galactic Red Supergiants: Cool, But Not As Cool As We Thought

Details 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

2005-04-15

arxiv.org/abs/astro-ph/0504337v1

Astrophys.J.628:973-985,2005

Astronomy and Astrophysics

Astrophysics

32 pages, 16 figures; Accepted by the Astrophysical Journal

Scientific paper

10.1086/430901

We use moderate-resolution optical spectrophotometry and the new MARCS stellar atmosphere models to determine the effective temperatures of 74 Galactic red supergiants. From these we find a new effective temperature scale that is significantly warmer than those in the literature. We show that this temperature scale, along with the newly derived bolometric corrections, gives much better agreement between our red supergiants and stellar evolutionary tracks. This agreement provides an independent verification of our new temperature scale. The combination of effective temperature and bolometric luminosities allows us to calculate stellar radii; the coolest and most luminous stars have radii of roughly 1500 solar radii (7 AU), in excellent accordance with the largest stellar radii predicted from current evolutionary theory. We find that similar results are obtained for the effective temperatures and bolometric luminosities using only the de-reddened V-K colors, providing a powerful demonstration of the self-consistency of the MARCS models.

Affiliated with

Also associated with

No associations

Rating

The Effective Temperature Scale of Galactic Red Supergiants: Cool, But Not As Cool As We Thought does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The Effective Temperature Scale of Galactic Red Supergiants: Cool, But Not As Cool As We Thought, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Effective Temperature Scale of Galactic Red Supergiants: Cool, But Not As Cool As We Thought will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-402195