Photometric and spectroscopic study of a highly reddened type Ia supernova SN 2003hx in NGC 2076

被引：4
|
作者：
Misra, Kuntal [1 ,2 ]
Sahu, D. K. [3 ]
Anupama, G. C. [4 ]
Pandey, Kavita [5 ]
机构：
[1] Aryabhatta Res Inst Observat Sci, Naini Tal 263129, India
[2] Interuniv Ctr Astron & Astrophys, Pune 411007, Maharashtra, India
[3] Ctr Res & Educ Sci & Technol, Bangalore 562114, Karnataka, India
[4] Indian Inst Astrophys, Bangalore 560034, Karnataka, India
[5] Kumaun Univ, Dept Phys, Naini Tal 263002, India
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2008年 / 389卷 / 02期
基金：
美国国家科学基金会;
关键词：
supernovae : general; supernovae : individual : SN 2003hx; galaxies : individual : NGC 2076;
D O I：
10.1111/j.1365-2966.2008.13398.x
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present UBVRI CCD photometry and optical spectra of the type Ia supernova SN 2003hx which appeared in the galaxy NGC 2076, obtained till similar to 146 d after the epoch of B-band maximum. The supernova reached at maximum brightness in B band on JD 245 2893 +/- 1.0 with an apparent magnitude of 14.92 +/- 0.01 mag which was estimated by making template fits to the light curves. SN 2003hx is an example of a highly reddened supernova with E( B - V) = 0.56 +/- 0.23. We estimate R v = 1.97 +/- 0.54 which indicates the small size of dust particles as compared to their galactic counterparts. The luminosity decline rate is Delta m(15)(B) = 1.17 +/- 0.12 mag and the absolute B-band magnitude obtained from the luminosity versus decline rate relation ( Phillips et al. 1999) is M-max(B) = -19.20 +/- 0.18 mag. The peak bolometric luminosity indicates that similar to 0.66M(circle dot) mass of Ni-56 was ejected by the supernova. The spectral evolution indicates the supernova to be a normal type Ia event.
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收藏
页码：706 / 716
页数：11
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