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

Year 2020, Volume: 1 Issue: 1, 389 - 390, 11.12.2020

Tülün Ergin Lab Saha Pratik Majumdar

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

References

• Abdo, A. A. et al. 2009, Astrophysical Journal Supplement Series, 183, 46.
• Abramowski, A. et al. 2014, Monthly Notices of the RAS, 439, 2828.
• Abramowski, A. et al. 2014, Astrophysical Journal Letters, 794, 6.
• Casandjian, J.-M. & Grenier, I. A. 2008, A&A, 489, 849.
• Caswell, J. L. 2004, Monthly Notices of the RAS, 349, 114.
• Combi, J. A., Albacete-Colombo, J. F. & Marti, J. 2008, A&A, 488, L25.
• Dame T. M., Hartmann D., & Thaddeus P. 2001, ApJ, 547, 792.
• 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.
• Hartman, R. C. et al. 1999,Astrophysical Journal Supplement Series, 123, 79.
• Koralesky, B. et al. 1998, Astrophysical Journal , 116, 1323.
• Kothes, R. & Dougherty, S. M. 2007, A&A, 468, 993.
• Lemoine-Goumard, M. et al. 2014, ApJ, 794, L16.
• Mattox, J. R. et al. 1996, Astrophysical Journal , 461, 396.
• Rho, J. & Petre, R. 1998, Astrophysical Journal Letters, 503, L167.
• Slane, P. et. al. 2014, arXiv:1406.4364.
• Torres, D. F. et al. 2003, Phys. Rept., 382, 303.
• Whiteoak, J. B. Z. & Green, A. J. 1996, A&ASS, 118, 329.