Dr Shubham Srivastav: Publications

Exploring the optical behaviour of a Type Iax supernova SN 2014dt

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 474:2 (2018) 2551-2563

Authors:

Mridweeka Singh, Kuntal Misra, DK Sahu, Raya Dastidar, Anjasha Gangopadhyay, Subhash Bose, Shubham Srivastav, GC Anupama, NK Chakradhari, Brajesh Kumar, Brijesh Kumar, SB Pandey

Abstract:

Abstract We present optical photometric (up to ∼410 d since Bmax) and spectroscopic (up to ∼157 d since Bmax) observations of a Type Iax supernova (SN) 2014dt located in M61. SN 2014dt is one of the brightest and closest (D ∼ 20 Mpc) discovered Type Iax SN. It best matches the light-curve evolution of SN 2005hk and reaches a peak magnitude of MB ∼ −18.13 ± 0.04 mag with Δm15 ∼ 1.35 ± 0.06 mag. The early spectra of SN 2014dt are similar to other Type Iax SNe, whereas the nebular spectrum at 157 d is dominated by narrow emission features with less blending as compared to SNe 2008ge and 2012Z. The ejecta velocities are between 5000 and 1000 km s−1, which also confirms the low-energy budget of Type Iax SN 2014dt compared to normal Type Ia SNe. Using the peak bolometric luminosity of SN 2005hk, we estimate the 56Ni mass of ∼0.14 M⊙. The striking similarity between SN 2014dt and SN 2005hk implies that a comparable amount of 56Ni would have been synthesized in the explosion of SN 2014dt.

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ASASSN-16fp (SN 2016coi): a transitional supernova between Type Ic and broad-lined Ic

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 473:3 (2018) 3776-3788

Authors:

Brajesh Kumar, A Singh, S Srivastav, DK Sahu, GC Anupama

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

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 466:2 (2017) 2436-2449

Authors:

Shubham Srivastav, GC Anupama, DK Sahu, CD Ravikumar

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Optical and NIR observations of the nearby type Ia supernova SN 2014J

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 457:1 (2016) 1000-1014

Authors:

Shubham Srivastav, JP Ninan, B Kumar, GC Anupama, DK Sahu, DK Ojha, TP Prabhu

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Strong near-infrared carbon in the Type Ia supernova iPTF13ebh

Astronomy & Astrophysics EDP Sciences 578 (2015) A9-A9

Authors:

EY Hsiao, CR Burns, C Contreras, P Höflich, D Sand, GH Marion, MM Phillips, M Stritzinger, S González-Gaitán, RE Mason, G Folatelli, E Parent, C Gall, R Amanullah, GC Anupama, I Arcavi, DPK Banerjee, Y Beletsky, GA Blanc, JS Bloom, PJ Brown, A Campillay, Y Cao, A De Cia, T Diamond, WL Freedman, C Gonzalez, A Goobar, S Holmbo, DA Howell, J Johansson, MM Kasliwal, RP Kirshner, K Krisciunas, SR Kulkarni, K Maguire, PA Milne, N Morrell, PE Nugent, EO Ofek, D Osip, P Palunas, DA Perley, SE Persson, AL Piro, M Rabus, M Roth, JM Schiefelbein, S Srivastav, M Sullivan, NB Suntzeff, J Surace, PR Woźniak, O Yaron

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Dr Shubham Srivastav

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Exploring the optical behaviour of a Type Iax supernova SN 2014dt

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ASASSN-16fp (SN 2016coi): a transitional supernova between Type Ic and broad-lined Ic

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

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Optical and NIR observations of the nearby type Ia supernova SN 2014J

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Strong near-infrared carbon in the Type Ia supernova iPTF13ebh

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Dr Shubham Srivastav

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Exploring the optical behaviour of a Type Iax supernova SN 2014dt

Authors:

Abstract:

ASASSN-16fp (SN 2016coi): a transitional supernova between Type Ic and broad-lined Ic

Authors:

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

Authors:

Optical and NIR observations of the nearby type Ia supernova SN 2014J

Authors:

Strong near-infrared carbon in the Type Ia supernova iPTF13ebh

Authors: