Results 101 to 110 of about 31,180 (215)

44Ti and 56Ni in core-collapse supernovae [PDF]

, 2008
We investigate the physical conditions where 44Ti and 56Ni are created in core-collapse supernovae. In this preliminary work we use a series of post-processing network calculations with parametrized expansion profiles that are representative of the wide ...
Bennett, Michael, Diehl, Steven, Fryer, Christopher L., Herwig, Falk, Hirschi, Raphael, Hungerford, Aimee, Magkotsios, Georgios, Pignatari, Marco, Rockefeller, Gabriel, Timmes, Francis X., Wiescher, Michael, Young, Patrick   +11 more
core   +2 more sources

The Early Evolution of Primordial Pair-Instability Supernovae

, 2010
The observational signatures of the first cosmic explosions and their chemical imprint on second-generation stars both crucially depend on how heavy elements mix within the star at the earliest stages of the blast. We present numerical simulations of the
Abel, Abel, Almgren, Alvarez, Bromm, Bromm, Bromm, C. C. Joggerst, Daniel J. Whalen, Fryer, Greif, Greif, Hammer, Heger, Joggerst, Joggerst, Joggerst, Karlsson, Kitayama, Kitayama, Mackey, Nakamura, O'Shea, Scannapieco, Smith, Whalen, Whalen, Whalen, Wise, Wise   +29 more
core   +1 more source

Understanding Core-Collapse Supernovae

, 2004
I summarize, in the form of an extended abstract, the ongoing efforts at the University of Arizona (and in collaboration) to understand core-collapse supernovae theoretically. Included are short discussions of 1D (SESAME) and 2D (VULCAN/2D) codes and results, as well as discussions of the possible role of rotation.
openaire   +2 more sources

SN 2024aecx: A Double-peaked Rapidly Evolving Type IIb Supernova at 11 Mpc

The Astrophysical Journal
We present the results of low-resolution spectroscopic and densely sampled multiband photometric follow-up of supernova (SN) 2024aecx. The SN was discovered in the spiral galaxy NGC 3521 (distance ∼ 11 Mpc) within a day after the explosion.
Xingzhu Zou, Brajesh Kumar, Rishabh Singh Teja, D. K. Sahu, Xinlei Chen, Avinash Singh, Weikang Lin, Xiangkun Liu, Dezi Liu, Hrishav Das, Mridweeka Singh, G. C. Anupama, Yu Pan, Guowang Du, Helong Guo, Tao Wang, Xufeng Zhu, Jujia Zhang, Yuan Fang, Chenxu Liu, Kaushik Chatterjee, Yuan-Pei Yang, Liping Li, Qian Zhai, Edoardo P. Lagioia, Xueling Du, Xinzhong Er, Jianhui Lian, Ziwei Li, Shiyan Zhong, Xiaowei Liu   +30 more
doaj   +1 more source

Towards Realistic Progenitors of Core-Collapse Supernovae

, 2011
Two-dimensional (2D) hydrodynamical simulations of progenitor evolution of a 23 solar mass star, close to core collapse (about 1 hour, in 1D), with simultaneously active C, Ne, O, and Si burning shells, are presented and contrasted to existing 1D models (
Arnett, Arnett, Arnett, Arnett, Arnett, Arnett, Asida, Bazàn, Brown, Browning, Bruen, Brun, Burrows, Böhm-Vitense, Casey Meakin, Clayton, Cox, Damköhler, Dearborn, Deupree, Deupree, Fryer, Fryer, Fryer, Goldreich, Hoyle, Hoyle, Hughes, Kalogera, Kuhlen, Landau, Ledoux, Lindl, Meakin, Meakin, Meakin, Meakin, Murphy, Nonaka, Nordlund, Porter, Sedov, Smith, Stone, Timmes, Timmes, Turner, Unno, W. David Arnett, Wongwathanarat, Woodward, Young, Zahn   +52 more
core   +1 more source

Spectropolarimetric Evolution of SN 2023ixf: An Asymmetric Explosion in a Confined Aspherical Circumstellar Medium

The Astrophysical Journal
We present complete spectropolarimetric coverage of the Type II supernova (SN) 2023ixf, ranging from 1 to 120 days after explosion. Polarimetry was obtained with the Kast double spectrograph on the Shane 3 m telescope at Lick Observatory.
Sergiy S. Vasylyev, Luc Dessart, Yi Yang, Alexei V. Filippenko, Kishore C. Patra, Thomas G. Brink, Lifan Wang, Ryan Chornock, Raffaella Margutti, Elinor L. Gates, Adam J. Burgasser, Huei Sears, Preethi R. Karpoor, Natalie LeBaron, Emma Softich, Christopher A. Theissen, Eli Wiston, WeiKang Zheng   +17 more
doaj   +1 more source

SN 2014C: A Metamorphic Supernova Exploded in the Intricate and Hydrogen-rich Surroundings

The Astrophysical Journal
We present photometric and spectroscopic observations of supernova (SN) SN 2014C, primarily emphasizing the initial month after the explosion at approximately daily intervals.
Qian Zhai, Jujia Zhang, Weili Lin, Paolo Mazzali, Elena Pian, Stefano Benetti, Lina Tomasella, Jialian Liu, Liping Li   +8 more
doaj   +1 more source

Long Gamma-Ray Bursts and Type Ic Core Collapse Supernovae Have Similar Locations in Hosts

, 2008
When the afterglow fades at the site of a long-duration gamma-ray burst (LGRB), Type Ic supernovae (SN Ic) are the only type of core collapse supernova observed. Recent work found that a sample of LGRB in high-redshift galaxies had different environments
Benetti S., Cappellaro E., Filippenko A. V., Michael Pahre, Patrick L. Kelly, Robert P. Kirshner, van den Bergh S.   +6 more
core   +2 more sources

Two Dimensional Core-Collapse Supernova Explosions Aided by General Relativity with Multidimensional Neutrino Transport

, 2018
We present results from simulations of core-collapse supernovae in FLASH using a newly-implemented multidimensional neutrino transport scheme and a newly-implemented general relativistic (GR) treatment of gravity.
Couch, Sean, O'Connor, Evan
core   +1 more source

Probing the Shock Breakout Signal of SN 2024ggi from the Transformation of Early Flash Spectroscopy

The Astrophysical Journal Letters
We present early-time, hour-to-day cadence spectroscopy of the nearby Type II supernova (SN II) 2024ggi, which was discovered at a phase when the SN shock had just emerged from the red supergiant (RSG) progenitor star.
Jujia Zhang, Luc Dessart, Xiaofeng Wang, Qian Zhai, Yi Yang, Liping Li, Han Lin, Giorgio Valerin, Yongzhi Cai, Zhen Guo, Lingzhi Wang, Zeyi Zhao, Zhenyu Wang, Shengyu Yan   +13 more
doaj   +1 more source