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arXiv · 2112.08748

Origin of the gamma-ray emission from supernova remnant HB9

Tülün Ergin·Lab Saha·Hidetoshi Sano·Aytap Sezer·Ryo Yamazaki·Pratik Majumdar·Yasuo Fukui
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Abstract

HB9 (G160.9+2.6) is a mixed-morphology Galactic supernova remnant (SNR) at a distance of $\sim$0.6 kpc. Previous analyses revealed recombining plasma emission in X-rays and an expanding shell structure in HI and CO emission, which were correlating with the spatial extent of HB9. In GeV energies, HB9 was found to show extended gamma-ray emission with a morphology that is consistent with the radio continuum emission showing a log-parabola-type spectrum. The overlap reported between the gas data and the excess gamma-ray emission at the southern region of the SNR's shell could indicate a possible interaction between them. We searched for hadronic gamma-ray emission signature in the spectrum to uncover possible interaction between the molecular environment and the SNR. Here we report the results of the gamma-ray spectral modelling studies of HB9.

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Tülün Ergin, Lab Saha, Hidetoshi Sano, Aytap Sezer, Ryo Yamazaki, Pratik Majumdar, Yasuo Fukui. 2021-12-16. Origin of the gamma-ray emission from supernova remnant HB9. https://arxiv.org/abs/2112.08748

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