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Optical observations of supernova 2012aw

Published online by Cambridge University Press:  29 January 2014

Subhash Bose ,
Brijesh Kumar ,
Firoza Sutaria ,
Rupak Roy ,
Brajesh Kumar ,
Vijay K. Bhatt  and
Sayan Chakraborti
Subhash Bose
Affiliation:
Aryabhatta Research Institute of Observational Sciences, Nainital, India email: [email protected]; [email protected]
Brijesh Kumar
Affiliation:
Aryabhatta Research Institute of Observational Sciences, Nainital, India email: [email protected]; [email protected]
Firoza Sutaria
Affiliation:
Indian Institute of Astrophysics, Bangalore, India
Rupak Roy
Affiliation:
Aryabhatta Research Institute of Observational Sciences, Nainital, India email: [email protected]; [email protected]
Brajesh Kumar
Affiliation:
Aryabhatta Research Institute of Observational Sciences, Nainital, India email: [email protected]; [email protected]
Vijay K. Bhatt
Affiliation:
Aryabhatta Research Institute of Observational Sciences, Nainital, India email: [email protected]; [email protected]
Sayan Chakraborti
Affiliation:
Institute for Theory and Computation, Harvard
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Abstract

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We present optical UBVRI photometric and low-resolution spectroscopic follow-up observations of a type II SN 2012aw in a nearby (~10 Mpc) galaxy M95 during 4 to 270 days post-explosion. The evolution characteristics of optical brightness and color are found to have striking similarity with the archetypal type IIP SN 1999em. The mid-plateau MV is −16.7 mag and the ejected nickel mass is ~0.06 M⊙. The presence and evolution of optical spectral features during 7d to 104d are also similar to SN 1999em as well as other normal type IIP events. The mid-plateau photospheric velocity is around 4200 km s−1 which is same as that of SN 2004et at similar phases, indicating similar energy of explosion i.e. 2 × 1051 erg s−1.

Keywords

(stars:) supernovae: individual (SN 2012aw)techniques: photometricspectroscopic
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S296: Supernova Environmental Impacts , January 2013 , pp. 334 - 335
Copyright
Copyright © International Astronomical Union 2014 

References

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