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Optical Studies of the Low Velocity Gradient Type Ia Supernovae 2009an and 2009ig

Published online by Cambridge University Press:  17 January 2013

D. K. Sahu ,
G. C. Anupama ,
P. Anto  and
U. K. Gurugubelli
D. K. Sahu
Affiliation:
Indian Institute of Astrophysics, Bangalore 560034, India
G. C. Anupama
Affiliation:
Indian Institute of Astrophysics, Bangalore 560034, India
P. Anto
Affiliation:
Indian Institute of Astrophysics, Bangalore 560034, India
U. K. Gurugubelli
Affiliation:
Indian Institute of Astrophysics, Bangalore 560034, India
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Abstract

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UBVRI photometry and medium resolution spectroscopy of two Type Ia supernovae, SN 2009an and SN 2009ig, are presented. Their Δm15(B) indicate these two SNe marginally deviate from “normal” Type Ia events. Spectroscopically, both SNe belong to the low velocity gradient group. The estimated mass of 56Ni ejected is almost a factor of two different for these two objects, with the estimates being ~0.4M⊙ for SN 2009an and ~0.8 M⊙ for SN 2009ig.

Keywords

supernovae: individual (SN 2009an & SN 2009ig)
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Issue S281: Binary Paths to Type Ia Supernovae Explosions , July 2011 , pp. 316 - 318
Copyright
Copyright © International Astronomical Union 2013

References

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