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On the hadronic γ-ray emission from Tycho's Supernova Remnant†

Published online by Cambridge University Press:  29 January 2014

Xiao Zhang ,
Yang Chen ,
Hui Li  and
Xin Zhou
Xiao Zhang
Affiliation:
Department of Astronomy, Nanjing Univ., Nanjing 210093, China
Yang Chen
Affiliation:
Department of Astronomy, Nanjing Univ., Nanjing 210093, China Key Laboratory of Modern Astronomy and Astrophysics, Nanjing Univ., Ministry of Education, China
Hui Li
Affiliation:
Department of Astronomy, Nanjing Univ., Nanjing 210093, China Department of Astronomy, Univ. of Michigan, 500 Church Street, Ann Arbor, MI 48109, USA
Xin Zhou
Affiliation:
Key Laboratory of Modern Astronomy and Astrophysics, Nanjing Univ., Ministry of Education, China Purple Mountain Observatory, 2 West Beijing Road, Nanjing 210008, China
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Abstract

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Tycho is one of nearly a dozen Galactic supernova remnants which are suggested to emit hadronic γ-ray emission. Among them, however, it is the only one in which the hadronic emission is proposed to arise from the interaction with low-density ambient medium. Based on the multi-band observations, we suggest that Tycho is encountering dense cloud at the northeastern boundary. The γ-ray emissions can be explained by hadronic process with self-consistent parameters, such as a modest energy conversion efficiency. In this SNR-cloud association scenario, the distance can be estimated as ~2.5 kpc.

Keywords

supernova remnantsISM: individual (Tycho)radiation mechanisms: non-thermal
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S296: Supernova Environmental Impacts , January 2013 , pp. 358 - 359
Copyright
Copyright © International Astronomical Union 2014 

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