First Detection of Far-IR Variability in M33 and M101

Details First Detection of Far-IR Variability in M33 and M101 First Detection of Far-IR Variability in M33 and M101

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21934813m&link_type=abstract

American Astronomical Society, AAS Meeting #219, #348.13

Astronomy and Astrophysics

Astronomy

Scientific paper

We present our analysis of multiple epochs of archival MIPS 24 micron imaging of the spiral galaxies M33 and M101. We detect the first signature of variability in 287 and 178 point sources in M33 and M101, respectively. At these wavelengths we believe that we are most likely seeing Young Stellar Objects (YSOs) and/or Asymptotic Giant Branch stars (AGBs). Recent evidence has suggested that infrared variability reveals insights into the dynamics between YSOs and AGBs and their surrounding dust shell. We explore the nature of these objects with a suite of ancillary data from the far-UV to sub-mm wavelengths and what we learn about star formation and evolution in environments different from the Milky Way galaxy.

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