Dr Shubham Srivastav: Publications

Revealing the Progenitor of SN 2021zby through Analysis of the TESS Shock-cooling Light Curve

The Astrophysical Journal Letters American Astronomical Society 943:2 (2023) l15

Authors:

Qinan Wang, Patrick Armstrong, Yossef Zenati, Ryan Ridden-Harper, Armin Rest, Iair Arcavi, Charles D Kilpatrick, Ryan J Foley, Brad E Tucker, Chris Lidman, Thomas L Killestein, Melissa Shahbandeh, Joseph P Anderson, Rodrigo Angulo, Chris Ashall, Jamison Burke, Ting-Wan Chen, Sophie von Coelln, Kyle A Dalrymple, Kyle W Davis, Michael D Fulton, Lluís Galbany, Estefania Padilla Gonzalez, Bore Gao, Mariusz Gromadzki, D Andrew Howell, Nada Ihanec, Jacob E Jencson, David O Jones, Joseph D Lyman, Curtis McCully, Tomás E Müller-Bravo, Megan Newsome, Matt Nicholl, David O’Neill, Craig Pellegrino, Sofia Rest, Stephen J Smartt, Ken Smith, Shubham Srivastav, Giacomo Terreran, Samaporn Tinyanont, David R Young, Alfredo Zenteno

More details from the publisher

More details

The Luminous Type Ia Supernova 2022ilv and Its Early Excess Emission

The Astrophysical Journal Letters American Astronomical Society 943:2 (2023) l20

Authors:

Shubham Srivastav, SJ Smartt, ME Huber, G Dimitriadis, KC Chambers, Michael D Fulton, Thomas Moore, FP Callan, James H Gillanders, K Maguire, M Nicholl, Luke J Shingles, SA Sim, KW Smith, JP Anderson, Thomas de Boer, Ting-Wan Chen, Hua Gao, DR Young

More details from the publisher

More details

The Birth of a Relativistic Jet Following the Disruption of a Star by a Cosmological Black Hole

Nature Astronomy Springer Nature 7:1 (2023) 88-104

Authors:

Dheeraj R Pasham, Matteo Lucchini, Tanmoy Laskar, Benjamin P Gompertz, Shubham Srivastav, Matt Nicholl, Stephen J Smartt, James CA Miller-Jones, Kate D Alexander, Rob Fender, Graham P Smith, M Fulton, Gulab Dewangan, Keith Gendreau, Eric R Coughlin, Lauren Rhodes, Assaf Horesh, Sjoert van Velzen, Itai Sfaradi, Muryel Guolo, Noel Castro Segura, Aysha Aamer, Joseph P Anderson, Iair Arcavi, Seán J Brennan, Kenneth Chambers, Panos Charalampopoulos, Ting-Wan Chen, A Clocchiatti, Thomas de Boer, Michel Dennefeld, Elizabeth Ferrara, Lluís Galbany, Hua Gao, James H Gillanders, Adelle Goodwin, Mariusz Gromadzki, M Huber, Peter G Jonker, Manasvita Joshi, Erin Kara, Thomas L Killestein, Peter Kosec, Daniel Kocevski, Giorgos Leloudas, Chien-Cheng Lin, Raffaella Margutti, Seppo Mattila, Thomas Moore, Tomás Müller-Bravo, Chow-Choong Ngeow, Samantha Oates, Francesca Onori, Yen-Chen Pan, Miguel Perez-Torres, Priyanka Rani, Ronald Remillard, Evan J Ridley, Steve Schulze, Xinyue Sheng, Luke Shingles, Ken W Smith, James F Steiner, Richard Wainscoat, Thomas Wevers, Sheng Yang

More details from the publisher

More details

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*

The Astrophysical Journal Letters American Astronomical Society 941:2 (2022) L32-L32

Authors:

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

Abstract:

Abstract Supernova (SN) 2021ocs was discovered in the galaxy NGC 7828 (z = 0.01911) within the interacting system Arp 144 and subsequently classified as a normal Type Ic SN around peak brightness. Very Large Telescope/FORS2 observations in the nebular phase at 148 days reveal that the spectrum is dominated by oxygen and magnesium emission lines of different transitions and ionization states: O i, [O i], [O ii], [O iii], Mg i, and Mg ii. Such a spectrum has no counterpart in the literature, though it bears a few features similar to those of some interacting Type Ibn and Icn SNe. Additionally, SN 2021ocs showed a blue color, (g − r) ≲ −0.5 mag, after the peak and up to late phases, atypical for a Type Ic SN. Together with the nebular spectrum, this suggests that SN 2021ocs underwent late-time interaction with an H/He-poor circumstellar medium (CSM) resulting from the pre-SN progenitor mass loss during its final ∼1000 days. The strong O and Mg lines and the absence of strong C and He lines suggest that the progenitor star’s O–Mg layer is exposed, which places SN 2021ocs as the most extreme case of a massive progenitor star’s envelope stripping in interacting SNe, followed by Type Icn (stripped C–O layer) and Ibn (stripped He-rich layer) SNe. This is the first time such a case is reported in the literature. The SN 2021ocs emphasizes the importance of late-time spectroscopy of SNe, even for those classified as normal events, to reveal the inner ejecta and progenitor star’s CSM and mass loss.

More details from the publisher

More details

The luminous type Ia supernova 2022ilv and its early excess emission

(2022)

Authors:

More details from the publisher

Details from ArXiV

Dr Shubham Srivastav

Research theme

Sub department

Revealing the Progenitor of SN 2021zby through Analysis of the TESS Shock-cooling Light Curve

Authors:

The Luminous Type Ia Supernova 2022ilv and Its Early Excess Emission

Authors:

The Birth of a Relativistic Jet Following the Disruption of a Star by a Cosmological Black Hole

Authors:

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:

Abstract:

The luminous type Ia supernova 2022ilv and its early excess emission

Authors:

FIND US

CONTACT US

Dr Shubham Srivastav

Research theme

Sub department

Research groups

Revealing the Progenitor of SN 2021zby through Analysis of the TESS Shock-cooling Light Curve

Authors:

The Luminous Type Ia Supernova 2022ilv and Its Early Excess Emission

Authors:

The Birth of a Relativistic Jet Following the Disruption of a Star by a Cosmological Black Hole

Authors:

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:

Abstract:

The luminous type Ia supernova 2022ilv and its early excess emission

Authors: