Dr Shubham Srivastav: Publications

Optical studies of a bright Type Iax supernova SN 2020rea

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 517:4 (2022) 5617-5626

Authors:

Mridweeka Singh, Kuntal Misra, Devendra K Sahu, Bhavya Ailawadhi, Anirban Dutta, D Andrew Howell, GC Anupama, K Azalee Bostroem, Jamison Burke, Raya Dastidar, Anjasha Gangopadhyay, Daichi Hiramatsu, Hyobin Im, Curtis McCully, Craig Pellegrino, Shubham Srivastav, Rishabh Singh Teja

Abstract:

ABSTRACTWe present optical photometric and spectroscopic analysis of a Type Iax supernova (SN) 2020rea situated at the brighter luminosity end of Type Iax supernovae (SNe). The light curve decline rate of SN 2020rea is Δm15(g) = 1.31 ± 0.08 mag which is similar to SNe 2012Z and 2005hk. Modelling the pseudo-bolometric light curve with a radiation diffusion model yields a mass of 56Ni of 0.13 ± 0.01 M⊙ and an ejecta mass of 0.77$^{+0.11}_{-0.21}$ M⊙. Spectral features of SN 2020rea during the photospheric phase show good resemblance with SN 2012Z. TARDIS modelling of the early spectra of SN 2020rea reveals a dominance of Iron Group Elements (IGEs). The photospheric velocity of the Si ii line around maximum for SN 2020rea is ∼ 6500 km s−1 which is less than the measured velocity of the Fe ii line and indicates significant mixing. The observed physical properties of SN 2020rea match with the predictions of pure deflagration model of a Chandrasekhar mass C–O white dwarf. The metallicity of the host galaxy around the SN region is 12 + log(O/H) = 8.56 ± 0.18 dex which is similar to that of SN 2012Z.

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India’s First Robotic Eye for Time-domain Astrophysics: The GROWTH-India Telescope

The Astronomical Journal American Astronomical Society 164:3 (2022) 90

Authors:

Harsh Kumar, Varun Bhalerao, GC Anupama, Sudhanshu Barway, Judhajeet Basu, Kunal Deshmukh, Kishalay De, Anirban Dutta, Christoffer Fremling, Hrishikesh Iyer, Adeem Jassani, Simran Joharle, Viraj Karambelkar, Maitreya Khandagale, K Adithya Krishna, Sumeet Kulkarni, Sujay Mate, Atharva Patil, DVS Phanindra, Subham Samantaray, Kritti Sharma, Yashvi Sharma, Vedant Shenoy, Avinash Singh, Shubham Srivastava, Vishwajeet Swain, Gaurav Waratkar, Dorje Angchuk, Padma Dorjay, Tsewang Dorjai, Tsewang Gyalson, Sonam Jorphail, Tashi Thsering Mahay, Rigzin Norbu, Tarun Kumar Sharma, Jigmet Stanzin, Tsewang Stanzin, Urgain Stanzin

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Panning for gold, but finding helium: discovery of the ultra-stripped supernova SN2019wxt from gravitational-wave follow-up observations

(2022)

Authors:

I Agudo, L Amati, T An, FE Bauer, S Benetti, MG Bernardini, R Beswick, K Bhirombhakdi, T de Boer, M Branchesi, SJ Brennan, MD Caballero-García, E Cappellaro, N Castro Rodríguez, AJ Castro-Tirado, KC Chambers, E Chassande-Mottin, S Chaty, T-W Chen, A Coleiro, S Covino, F D'Ammando, P D'Avanzo, V D'Elia, A Fiore, A Flörs, M Fraser, S Frey, C Frohmaier, L Galbany, C Gall, H Gao, J García-Rojas, G Ghirlanda, S Giarratana, JH Gillanders, M Giroletti, BP Gompertz, M Gromadzki, KE Heintz, Y-D Hu, ME Huber, A Inkenhaag, L Izzo, ZP Jin, PG Jonker, DA Kann, EC Kool, R Kotak, G Leloudas, AJ Levan, C-C Lin, JD Lyman, EA Magnier, K Maguire, I Mandel, B Marcote, D Mata Sánchez, S Mattila, A Melandri, MJ Michałowski, J Moldon, M Nicholl, A Nicuesa Guelbenzu, SR Oates, F Onori, M Orienti, R Paladino, Z Paragi, M Perez-Torres, E Pian, G Pignata, S Piranomonte, J Quirola-Vásquez, F Ragosta, A Rau, S Ronchini, A Rossi, R Sánchez-Ramírez, OS Salafia, S Schulze, SJ Smartt, KW Smith, J Sollerman, S Srivastav, RLC Starling, D Steeghs, HF Stevance, V Testa, MAP Torres, SD Vergani, D Vescovi, R Wainscost, D Watson, K Wiersema, Ł Wyrzykowski, J Yang, S Yang, DR Young

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SN 2016dsg: A Thermonuclear Explosion Involving a Thick Helium Shell

The Astrophysical Journal American Astronomical Society 934:2 (2022) 102

Authors:

Yize Dong, Stefano Valenti, Abigail Polin, Aoife Boyle, Andreas Flörs, Christian Vogl, Wolfgang E Kerzendorf, David J Sand, Saurabh W Jha, Łukasz Wyrzykowski, K Azalee Bostroem, Jeniveve Pearson, Curtis McCully, Jennifer E Andrews, Stefano Benetti, Stéphane Blondin, L Galbany, Mariusz Gromadzki, Griffin Hosseinzadeh, D Andrew Howell, Cosimo Inserra, Jacob E Jencson, Michael Lundquist, JD Lyman, Mark Magee, Kate Maguire, Nicolas Meza, Shubham Srivastav, Stefan Taubenberger, JH Terwel, Samuel Wyatt, DR Young

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SN 2020kyg and the rates of faint Iax supernovae from ATLAS

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 511:2 (2022) 2708-2731

Authors:

Shubham Srivastav, SJ Smartt, ME Huber, KC Chambers, CR Angus, T-W Chen, FP Callan, JH Gillanders, OR McBrien, SA Sim, M Fulton, J Hjorth, KW Smith, DR Young, K Auchettl, JP Anderson, G Pignata, TJL de Boer, C-C Lin, EA Magnier

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Dr Shubham Srivastav

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Optical studies of a bright Type Iax supernova SN 2020rea

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India’s First Robotic Eye for Time-domain Astrophysics: The GROWTH-India Telescope

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Panning for gold, but finding helium: discovery of the ultra-stripped supernova SN2019wxt from gravitational-wave follow-up observations

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SN 2016dsg: A Thermonuclear Explosion Involving a Thick Helium Shell

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SN 2020kyg and the rates of faint Iax supernovae from ATLAS

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Dr Shubham Srivastav

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Optical studies of a bright Type Iax supernova SN 2020rea

Authors:

Abstract:

India’s First Robotic Eye for Time-domain Astrophysics: The GROWTH-India Telescope

Authors:

Panning for gold, but finding helium: discovery of the ultra-stripped supernova SN2019wxt from gravitational-wave follow-up observations

Authors:

SN 2016dsg: A Thermonuclear Explosion Involving a Thick Helium Shell

Authors:

SN 2020kyg and the rates of faint Iax supernovae from ATLAS

Authors: