SIMBAD references

2017MNRAS.466.2436S - Mon. Not. R. Astron. Soc., 466, 2436-2449 (2017/April-1)

SN 2015bp: adding to the growing population of transitional Type Ia supernovae.


Abstract (from CDS):

Photometric and spectroscopic observations of Type Ia supernova 2015bp are presented, spanning ∼-6 to ∼+141 d since B-band maximum. Also presented are unpublished HCT spectra of type Ia iPTF13ebh between -11 and +34 d since B-band maximum. SN 2015bp shows rapidly declining light curves with Δm15(B) = 1.72 ± 0.04. The I-band light curve shows a clear secondary maximum and peaks before the B-band maximum, placing SN 2015bp in the transitional category of SNe Ia. The spectral evolution of SN 2015bp resembles other transitional SNe Ia rather than 1991bg-like events. The C II λ6580 feature is detected in both SN 2015bp and iPTF13ebh, though it is present till the epoch of B-band maximum in the case of SN 2015bp. The velocity gradients of Si II λ6355 place SN 2015bp and iPTF13ebh in the FAINT subclass, whereas pseudo-equivalent widths of Si II features place them in the Cool (CL) subclass of SNe Ia. The bolometric light curve of SN 2015bp indicates that ∼0.2 M of 56Ni was synthesized in the explosion, with a total ejected mass of ∼0.9 M, suggesting a sub-Chandrasekhar mass white dwarf progenitor.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): supernovae: general - supernovae: individual: iPTF13ebh - supernovae: individual: SN 2015bp - galaxies: individual: NGC 5839 - galaxies: individual: NGC 5839

Simbad objects: 35

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