A Point‐Source Survey of M31 with theSpitzer Space Telescope
Copyright policy )A Point‐Source Survey of M31 with theSpitzer Space Telescope
We explore the stellar population of M31 in a Spitzer Space Telescope survey utilizing IRAC and MIPS observations. Red supergiants are the brightest objects seen in the infrared; they are a prominent evolutionary phase. Due to their circumstellar envelopes, many of these radiate the bulk of their luminosity at IRAC wavelengths and do not stand out in the near infrared or optically. Going fainter, we see large numbers of luminous asymptotic giant branch (AGB) stars, many of which are known long period variables. Relative to M33, the AGB carbon star population of M31 appears sparse, but this needs to be spectroscopically confirmed.
Accepted by ApJ
- University of Minnesota Morris United States
- Harvard University United States
- University of Minnesota System United States
- University of Minnesota United States
- University of Minnesota-Twin Cities United States
Astrophysics (astro-ph), FOS: Physical sciences, Astrophysics
Astrophysics (astro-ph), FOS: Physical sciences, Astrophysics
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