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

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dc.contributor.author Srivastav, S
dc.contributor.author Anupama, G. C
dc.contributor.author Sahu, D. K
dc.contributor.author Ravikumar, C. D
dc.date.accessioned 2020-11-17T14:12:47Z
dc.date.available 2020-11-17T14:12:47Z
dc.date.issued 2017-04
dc.identifier.citation Monthly Notices of the Royal Astronomical Society, Vol. 466, No. 2, pp. 2436-2449 en_US
dc.identifier.issn 1365-2966
dc.identifier.uri http://prints.iiap.res.in/handle/2248/7127
dc.description Restricted Access © Royal Astronomical Society https://doi.org/10.1093/mnras/stw3263 en_US
dc.description.abstract 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 Also presented are unpublished HCT spectra of type Ia iPTF13ebh between −11 and +34 d since B-band maximum.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. en_US
dc.language.iso en en_US
dc.publisher Oxford University Press on behalf of the Royal Astronomical Society en_US
dc.subject Supernovae: general en_US
dc.subject Supernovae: individual: iPTF13ebh en_US
dc.subject Supernovae: individual: SN 2015bp en_US
dc.subject Galaxies: individual: NGC 5839 en_US
dc.title SN 2015bp: adding to the growing population of transitional Type Ia supernovae en_US
dc.type Article en_US


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