no code implementations • 4 Sep 2020 • Kishalay De, U. Christoffer Fremling, Avishay Gal-Yam, Ofer Yaron, Mansi M. Kasliwal, S. R. Kulkarni
The presence of H, together with the large [Ca II]/[O I] ratio ($\approx10-15$) in the nebular phase is consistent with SN 2019ehk being a Type IIb core-collapse supernova from a stripped low mass ($\approx9-9. 5$ M$_\odot$) progenitor, similar to the Ca-rich SN IIb iPTF 15eqv.
High Energy Astrophysical Phenomena Solar and Stellar Astrophysics
1 code implementation • 2 Mar 2020 • Anna Y. Q. Ho, D. A. Perley, S. R. Kulkarni, D. Z. J. Dong, K. De, P. Chandra, I. Andreoni, E. C. Bellm, K. B. Burdge, M. Coughlin, R. Dekany, M. Feeney, D. D. Frederiks, C. Fremling, V. Z. Golkhou, M. Graham, D. Hale, G. Helou, A. Horesh, R. R. Laher, F. Masci, A. A. Miller, M. Porter, A. Ridnaia, B. Rusholme, D. L. Shupe, M. T. Soumagnac, D. S. Svinkin
Compiling transients in the literature with $t_\mathrm{rise} <5$d and $M_\mathrm{peak}<-20$mag, we find that a significant number are engine-powered, and suggest that the high peak optical luminosity is directly related to the presence of this engine.
High Energy Astrophysical Phenomena
1 code implementation • 21 Dec 2019 • Anna Y. Q. Ho, Alessandra Corsi, S. Bradley Cenko, Francesco Taddia, S. R. Kulkarni, Scott Adams, Kishalay De, Richard Dekany, Dmitry D. Frederiks, Christoffer Fremling, V. Zach Golkhou, Thomas Kupfer, Russ R. Laher, Ashish Mahabal, Frank J. Masci, Adam A. Miller, James D. Neill, Daniel Reiley, Reed Riddle, Anna Ridnaia, Ben Rusholme, Yashvi Sharma, Jesper Sollerman, Maayane T. Soumagnac, Dmitry S. Svinkin, David L. Shupe
We present ZTF18aaqjovh (SN 2018bvw), a high-velocity ("broad-lined") stripped-envelope (Type Ic) supernova (Ic-BL SN) discovered in the Zwicky Transient Facility one-day cadence survey.
High Energy Astrophysical Phenomena
1 code implementation • 25 Oct 2018 • Anna Y. Q. Ho, E. Sterl Phinney, Vikram Ravi, S. R. Kulkarni, Glen Petitpas, Bjorn Emonts, Varun Bhalerao, Ray Blundell, S. Bradley Cenko, Dougal Dobie, Ryan Howie, Nikita Kamraj, Mansi M. Kasliwal, Tara Murphy, Daniel A. Perley, T. K. Sridharan, Ilsang Yoon
Regardless of the nature of this central engine, this source heralds a new class of energetic transients shocking a dense medium, which at early times are most readily observed at millimeter wavelengths.
High Energy Astrophysical Phenomena
