Identifying the Gamma-ray Emission of the Nearby Galaxy M83

Abstract

We report on the detection of a gamma-ray source at the position of the nearby star-forming galaxy (SFG) M83, which is found from our analysis of 14 years of the data obtained with the Large Area Telescope (LAT) on-board {\it Fermi Gamma-ray Space Telescope (Fermi)}. The source is weakly detected, with a significance of $\sim 5\sigma$, and its emission can be described with an exponentially cutoff power law. At a distance of 4.61\,Mpc, the source's gamma-ray luminosity is $\sim 1.4\times 10^{39}$\,erg\,s${}^{-1}$, roughly along the correlation line between the \gr\ and IR luminosities determined for nearby SFGs. Because of the weak detection, the source spectrum can not be used for checking its similarity with those of other SFGs. Given the positional matches and the empirical expectation for gamma-ray emission from M83 due to the galaxy's star-forming activity, we conclude that the gamma-ray source is the likely counterpart to m83. The detection thus adds another member to the group of approximately a dozen SFGs, whose \gr\ emissions mostly have a cosmic-ray origin.

arXiv comment6 pages, 4 figures, 2 tables, accepted for publication in ApJ

References in corpus (20)

• The Global Schmidt Law in Star Forming Galaxies
• Fermi Large Area Telescope Second Source Catalog
• Incremental Fermi Large Area Telescope Fourth Source Catalog
• GeV Observations of Star-forming Galaxies with \textit{Fermi} LAT
• Central Rotation Curves of Spiral Galaxies
• The Physics of the FIR-Radio Correlation: I. Calorimetry, Conspiracy, and Implications
• Detection of Gamma-Ray Emission from the Starburst Galaxies M82 and NGC 253 with the Large Area Telescope on Fermi
• Cepheid Distances to SNe Ia Host Galaxies based on a Revised Photometric Zero-Point of the HST-WFPC2 and New P-L Relations and Metallicity Corrections
• Fermi Large Area Telescope observations of Local Group galaxies: Detection of M31 and search for M33
• High energy gamma-ray emission from the starburst nucleus of NGC 253
• The $\gamma$-ray Emission of Star-Forming Galaxies
• Observations of M31 and M33 with the Fermi Large Area Telescope: a galactic center excess in Andromeda?
• Cosmic ray production in supernovae
• Fermi-LAT Observations of Gamma-Ray Emission Towards the Outer Halo of M31
• Evidence of Fermi bubbles around M31
• Evidence of AGN activity in the gamma-ray emission from two starburst galaxies
• Constraints on the dark matter annihilation from Fermi-LAT observation of M31
• GeV $\gamma$-ray emission from M33 and Arp~299
• The Andromeda Gamma-Ray Excess: Background Systematics of the Millisecond Pulsars and Dark Matter Interpretations
• On the Gamma-Ray Emission of the Andromeda Galaxy M31

Cited by in corpus (1)

• Hunting Star-Forming Galaxies in the Gamma-Ray Domain