Fermi-LAT observations of the Local Group Galaxy M33
X. Hou
on behalf of the Fermi-LAT Collaboration
Abstract:
Star-forming galaxies produce diffuse gamma-ray emission through interactions of cosmic-ray (CR) particles with the interstellar medium. Studying this emission can inform us about CR acceleration and transport processes in galaxies, and comparing different systems will reveal how galactic properties, such as star formation rate (SFR), gas content, or size, affects the CR population. Previous studies on a large sample of star-forming galaxies have revealed a possible correlation between the gamma-ray luminosity and SFR for both Local Group Galaxies and nearby starburst/star-forming galaxies. We present a detailed analysis of Fermi-LAT observations of the previously non-detected Local Group Galaxy M33 using 7 years of Pass 8 data. The results are compared with those obtained on detected star-forming galaxies, including the gamma-ray luminosity-SFR correlation.
- Curator: J.D. Myers
- NASA Official: Phil Newman
- Science Official: Elizabeth Hays
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