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Unveiling the structure of the progenitors of type-IIP Supernovae through multi-waveband observations

Published online by Cambridge University Press:  17 October 2017

F. K. Sutaria ,
Alak Ray ,
Subhash Bose  and
Brijesh Kumar
F. K. Sutaria
Affiliation:
Indian Institute of Astrophysics, Koramangala Block II, Bangalore 560034, India. email: fsutaria@gmail.com
Alak Ray
Affiliation:
Homi Bhabha Road, Navy Nagar, Colaba, Mumbai, Maharashtra 400005, India. email: alak.ray@gmail.com
Subhash Bose
Affiliation:
Kavli Institute for Astronomy and Astrophysics, Peking University, Yi He Yuan Road 5, Hai Dian District, Beijing 100871, China. email: email@subhashbose.com
Brijesh Kumar
Affiliation:
Aryabhatta Research Institute of Observational Sciences, Manora Peak, Nainital - 263001, Uttarakhand, India. email: brij@aries.res.in
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Abstract

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Observational evidence from archival, pre-explosion images, suggests that progenitors of type-IIP SNe (SNe-IIP) have 8 ⩽ MP ⩽ 17 M⊙. However, the post-explosion temporal evolution of the event suggests that even in this mass range, the stellar evolutionary paths, the ensuing mass loss, and the eventual interaction of the supernova shock with the resulting CSM can show considerable diversity. Here we present the results from our program on multi-waveband (mainly optical) observations of SNe-IIP. Mass loss in their progenitors, with a massive and extended H-envelopes, is seen to occur via both strong stellar winds, or episodic mass ejections. Moreover, some type-IIP SNe also show unusually steep decline, characteristic of type-IIL (e.g. SN-IIP 2013ej). Our early and late-time spectrophotometry of these events shows CSM- shock interaction to varying degree among progenitors of comparable mass. Combined with X-ray data, our findings suggest that SNe-IIP progenitors can lose mass via strong stellar winds (e.g. SN2013ej, and SN2014cx), have episodic mass loss (SN2011ja), or have negligible mass loss (SN2012aw, SN2013ab).

Keywords

(stars:) supernovae: individual (SN2013ej, SN2013ab, SN2012aw)
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S331: Supernova 1987A:30 years later - Cosmic Rays and Nuclei from Supernovae and their aftermaths , February 2017 , pp. 17 - 22
Copyright
Copyright © International Astronomical Union 2017 

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