Discovery of GeV Gamma-ray Emission from the Galactic Supernova Remnant Kes 41

Abstract

We present the discovery of gamma-ray emission of the mixed-morphology supernova remnant (SNR) G337.8$-$0.1 (Kes 41) in the energy range of 0.2 $-$ 300 GeV using the data from Large Area Telescope on board of Fermi Gamma-ray Space Telescope ({\it Fermi}-LAT). SNR shocks interacting with molecular clouds are the best sites to search for the 'hadronic' origin of the gamma-ray emission and the acceleration processes of high-energy particles. There is multi-wavelength evidence for interactions of Kes 41 with a nearby molecular cloud suggesting that it may be a site for cosmic-ray acceleration. In this paper, we present the gamma-ray analysis using the {\it Fermi}-LAT data of $\sim$6 years, where we try to disentangle the complex morphology of the neighborhood of Kes 41. We report the detection of Kes 41 at a significance of $\sim$21$\sigma$ and a new closeby source ($\sim$31$\sigma$), as well as give preliminary results of the extension measurements.

Keywords

• supernova remnants
• compact objects
• galaxies: general

Kaynakça

1. Abdo, A. A. et al. 2009, Astrophysical Journal Supplement Series, 183, 46.
2. Abramowski, A. et al. 2014, Monthly Notices of the RAS, 439, 2828.
3. Abramowski, A. et al. 2014, Astrophysical Journal Letters, 794, 6.
4. Casandjian, J.-M. & Grenier, I. A. 2008, A&A, 489, 849.
5. Caswell, J. L. 2004, Monthly Notices of the RAS, 349, 114.
6. Combi, J. A., Albacete-Colombo, J. F. & Marti, J. 2008, A&A, 488, L25.
7. Dame T. M., Hartmann D., & Thaddeus P. 2001, ApJ, 547, 792.
8. Ergin, T. & Ercan, N. E. 2012, HIGH ENERGY GAMMA-RAY ASTRONOMY: 5th International Meeting on High Energy Gamma-Ray Astronomy. AIP Conference Proceedings, 1505, 265.

9. Hartman, R. C. et al. 1999,Astrophysical Journal Supplement Series, 123, 79.
10. Koralesky, B. et al. 1998, Astrophysical Journal , 116, 1323.
11. Kothes, R. & Dougherty, S. M. 2007, A&A, 468, 993.
12. Lemoine-Goumard, M. et al. 2014, ApJ, 794, L16.
13. Mattox, J. R. et al. 1996, Astrophysical Journal , 461, 396.
14. Rho, J. & Petre, R. 1998, Astrophysical Journal Letters, 503, L167.
15. Slane, P. et. al. 2014, arXiv:1406.4364.
16. Torres, D. F. et al. 2003, Phys. Rept., 382, 303.
17. Whiteoak, J. B. Z. & Green, A. J. 1996, A&ASS, 118, 329.