Name: Shrutika Tiwari
Affiliation: School of Studies in Physics and Astrophysics, Pt. Ravishankar Shukla University, Raipur.
Conference ID : ASI2022_265
Title : PSN J0910+5003 : A type Ia Supernova explosion similar to Super-Chandrasekhar events.
Authors : Shrutika Tiwari1, N. K. Chakradhari1, D.K. Sahu2, and G. C. Anupama2 1 School of Studies in Physics & Astrophysics, Pt. Ravishankar Shukla University, Raipur 492010 2 Indian Institute of Astrophysics, Koramangala, Bangalore 560034
Abstract Type: Poster
Abstract Category : Extragalactic Astronomy
Abstract : We present optical photometric and spectroscopic studies of type Ia supernova PSN J0910+5003 in UGC 4812. The observations range from ~ -10 to +114 d with respect to maximum light in B band that took place on JD = 245 7347.0 +/- 0.6 with an apparent brightness of 17.13 +/- 0.05 mag. PSN J0910+5003 exhibits properties similar to super-Chandrasekhar / 09dc–like SNe Ia. Compared to the normal SNe Ia, the light curves are very broad. The decline rate parameter is estimated as ∆m 15 (B) true = 0.70 ± 0.05 similar to the values obtained for 09dc-like SNe 2006gz/09dc/07if and ASASSN-15pz.The absolute magnitudes at maximum in B and V bands are estimated as -19.44 +/- 0.20 mag and -19.48 +/- 0.20 mag, respectively. From the peak bolometric luminosity of log L_bol = 43.25 +/- 0.06 erg/s, the mass of 56Ni synthesized in the explosion is estimated as 0.64 ± 0.09 solar mass. Early spectra of PSN J0910+5003 closely match with those of 09dc-like SNe Ia. The prominent C II lines occasionally seen in super-Chandrasekhar events are also detected. Photospheric velocity evolution of PSN J0910+5003 is similar to SN 2006gz.