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Circumstellar Interaction in Supernovae in Dense Environments—An Observational Perspective

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Abstract

In a supernova explosion, the ejecta interacting with the surrounding circumstellar medium (CSM) give rise to variety of radiation. Since CSM is created from the mass loss from the progenitor, it carries footprints of the late time evolution of the star. This is one of the unique ways to get a handle on the nature of the progenitor system. Here, I will focus mainly on the supernovae (SNe) exploding in dense environments, a.k.a. Type IIn SNe. Radio and X-ray emission from this class of SNe have revealed important modifications in their radiation properties, due to the presence of high density CSM. Forward shock dominance in the X-ray emission, internal free-free absorption of the radio emission, episodic or non-steady mass loss rate, and asymmetry in the explosion seem to be common properties of this class of SNe.

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Acknowledgements

I thank referee for useful comments, which helped improve this chapter. I acknowledge the support from the Department of Science and Technology via SwaranaJayanti Fellowship award (file no. DST/SJF/PSA-01/2014-15). The chapter has benefited immensely from discussions with Roger Chevalier, Claes Fransson, and Nikolai Chugai at various stages. I am highly indebted to Roger Chevalier for proof reading the manuscript.

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Correspondence to Poonam Chandra.

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Supernovae

Edited by Andrei Bykov, Roger Chevalier, John Raymond, Friedrich-Karl Thielemann, Maurizio Falanga and Rudolf von Steiger

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Chandra, P. Circumstellar Interaction in Supernovae in Dense Environments—An Observational Perspective. Space Sci Rev 214, 27 (2018). https://doi.org/10.1007/s11214-017-0461-6

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  • DOI: https://doi.org/10.1007/s11214-017-0461-6

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