Dr Shubham Srivastav: Publications

Late-time H/He-poor circumstellar interaction in the type-Ic supernova SN 2021ocs: an exposed oxygen-magnesium layer and extreme stripping of the progenitor

ArXiv 2210.01755 (2022)

Authors:

H Kuncarayakti, K Maeda, L Dessart, T Nagao, M Fulton, CP Gutierrez, ME Huber, DR Young, R Kotak, S Mattila, JP Anderson, L Ferrari, G Folatelli, H Gao, E Magnier, KW Smith, S Srivastav

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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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Panchromatic evolution of three luminous red novae: Forbidden hugs in pandemic times -- IV

(2022)

Authors:

A Pastorello, G Valerin, M Fraser, A Reguitti, N Elias-Rosa, AV Filippenko, C Rojas-Bravo, L Tartaglia, TM Reynolds, S Valenti, JE Andrews, C Ashall, KA Bostroem, TG Brink, J Burke, Y-Z Cai, E Cappellaro, DA Coulter, R Dastidar, KW Davis, G Dimitriadis, A Fiore, RJ Foley, D Fugazza, L Galbany, A Gangopadhyay, S Geier, CP Gutierrez, J Haislip, D Hiramatsu, S Holmbo, DA Howell, EY Hsiao, T Hung, SW Jha, E Kankare, E Karamehmetoglu, CD Kilpatrick, R Kotak, V Kouprianov, T Kravtsov, S Kumar, Z-T Li, MJ Lundquist, P Lundqvist, K Matilainen, PA Mazzali, C McCully, K Misra, A Morales-Garoffolo, S Moran, N Morrell, M Newsome, E Padilla Gonzalez, Y-C Pan, C Pellegrino, MM Phillips, G Pignata, AL Piro, DE Reichart, A Rest, I Salmaso, DJ Sand, MR Siebert, SJ Smartt, KW Smith, S Srivastav, MD Stritzinger, K Taggart, S Tinyanont, S-Y Yan, L Wang, X-F Wang, SC Williams, S Wyatt, T-M Zhang, T de Boer, K Chambers, H Gao, E Magnier

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

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

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

Abstract:

Abstract A thermonuclear explosion triggered by a He-shell detonation on a carbon–oxygen white-dwarf core has been predicted to have strong UV line blanketing at early times due to the iron-group elements produced during He-shell burning. We present the photometric and spectroscopic observations of SN 2016dsg, a subluminous peculiar Type I supernova consistent with a thermonuclear explosion involving a thick He shell. With a redshift of 0.04, the i -band peak absolute magnitude is derived to be around −17.5. The object is located far away from its host, an early-type galaxy, suggesting it originated from an old stellar population. The spectra collected after the peak are unusually red, show strong UV line blanketing and weak O i λ 7773 absorption lines, and do not evolve significantly over 30 days. An absorption line around 9700–10500 Å is detected in the near-infrared spectrum and is likely from the unburnt He in the ejecta. The spectroscopic evolution is consistent with the thermonuclear explosion models for a sub-Chandrasekhar-mass white dwarf with a thick He shell, while the photometric evolution is not well described by existing models.

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Dr Shubham Srivastav

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Late-time H/He-poor circumstellar interaction in the type-Ic supernova SN 2021ocs: an exposed oxygen-magnesium layer and extreme stripping of the progenitor

Authors:

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:

Panchromatic evolution of three luminous red novae: Forbidden hugs in pandemic times -- IV

Authors:

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

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Abstract:

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Dr Shubham Srivastav

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Late-time H/He-poor circumstellar interaction in the type-Ic supernova SN 2021ocs: an exposed oxygen-magnesium layer and extreme stripping of the progenitor

Authors:

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:

Panchromatic evolution of three luminous red novae: Forbidden hugs in pandemic times -- IV

Authors:

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

Authors:

Abstract: