Invited paper for New Astronomy Reviews, special Local Group issue, 2013.
astro-ph/1305.5914

For a PDF version of the article, click here.

MASSIVE STARS IN THE GALAXIES OF THE LOCAL GROUP

Philip Massey


Lowell Observatory, 1400 W. Mars Hill Road, Flagstaff, AZ 86001, USA


Abstract: The star-forming galaxies of the Local Group act as our laboratories for testing massive star evolutionary models. In this review, I briefly summarize what we believe we know about massive star evolution, and the connection between OB stars, Luminous Blue Variables, yellow supergiants, red supergiants, and Wolf-Rayet stars. The difficulties and recent successes in identifying these various types of massive stars in the neighboring galaxies of the Local Group will be discussed.

Key words: evolution stars: early-type stars: late-type supergiants


Table of Contents

INTRODUCTION
Motivation
A Massive Star Primer
Luminous Blue Variables

THE MASSIVE STAR CONTENT OF THE LOCAL GROUP
Counting the OB Stars: Harder than it Looks
Luminous Blue Variables: Silent Quackers
Yellow Supergiants: Looking at Stellar Evolution through a Magnifying Glass
Red Supergiants: Big and Sometimes Too Cool
The Wolf-Rayet Stars: Easy to Find Some, but Tough to Find the Rest

SUMMARY AND FUTURE WORK

REFERENCES

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