The Evolution of Massive Stars. I. Red Supergiants in the Magellanic Clouds

  title={The Evolution of Massive Stars. I. Red Supergiants in the Magellanic Clouds},
  author={Philip Massey and K. A. G. Olsen},
  journal={The Astronomical Journal},
  pages={2867 - 2886}
We investigate the red supergiant (RSG) content of the SMC and LMC using multiobject spectroscopy on a sample of red stars previously identified by BVR CCD photometry. We obtained high-accuracy (<1 km s-1) radial velocities for 118 red stars seen toward the SMC and 167 red stars seen toward the LMC, confirming most of these (89% and 95%, respectively) as red supergiants. Spectral types were also determined for most of these RSGs. We find that the distribution of spectral types is skewed toward… 


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