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Shrinivas R. Kulkarni on Muck Rack

Shrinivas R. Kulkarni

As seen in: Nature
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Articles

An extremely luminous flare recorded from a supermassive black hole

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By Matthew Graham, K. Ford, Daniel Stern, Matteo Cantiello, Andrew Drake Verified, Mansi Kasliwal, Mike Koss, Raffaella Margutti, Sam Rose, Phil Wiseman, S. G. Djorgovski, Patrik M. Veres, Eric C. Bellm, Tracy Chen Verified, Steven L. Groom, Shrinivas R. Kulkarni, Ashish A. Mahabal, Barry McKernan, Yuanze Ding, Jean Somalwar
| Nature Verified
Abstract Since their discovery more than 60 years ago, accreting supermassive black holes in active galactic nuclei (AGN) have been recognized as highly variable sources, requiring an extremely compact, dynamic environment. Their variability is related to several phenomena, including changing accretion rates, temperature changes, foreground absorbers and structural changes to the accretion disk.
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Extremely stripped supernova reveals a silicon and sulfur formation site

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By Steve Schulze, Avishay Gal-Yam, Luc Dessart, Adam Miller, Stan Woosley, Yi Yang, Mattia Bulla, Jesper Sollerman, Alexei V. Filippenko, Daniel Perley, Daichi Tsuna, Ragnhild Lunnan, Sean Brennan Verified, Seán Brennan, Thomas G. Brink, Ping Chen, Kaustav Das, Suhail Dhawan, Claes Fransson, Christoffer Fremling, Anders Jerkstrand, Doron Kushnir, Keiichi Maeda, Kate Maguire, Eran O. Ofek, Conor Omand, Yashvi Sharma, Gokul P Srinivasaragavan, Nora L. Strothjohann, Yuki Takei, Eli Waxman, Lin Yan, Yuhan Yao, Weikang Zheng, Erez Zimmerman, Eric C. Bellm, Michael Coughlin, Frank J. Masci, Mickael Rigault, Shrinivas R. Kulkarni, Ofer Yaron, K-Ryan Hinds, Nikhil Sarin, Rachel J. Bruch, Anjasha Gangopadhyay, Ido Irani, Yu-Jing Qin, Josiah Purdum, Avery Wold
| Nature Verified
Abstract Stars are initially powered by the fusion of hydrogen to helium. These ashes serve as fuel in a series of stages1,2,3, transforming massive stars into a structure of shells. These are composed of natal hydrogen on the outside and consecutively heavier compositions inside, predicted to be dominated by He, C/O, O/Ne/Mg and O/Si/S (refs. 4,5). Silicon and sulfur are fused into iron, leading to the collapse of the core and either a supernova explosion or the formation of a black hole6,7,8,9.
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