Results 101 to 110 of about 6,421 (225)

Three-dimensional Structure of Incomplete Carbon–Oxygen Detonations in Type Ia Supernovae

The Astrophysical Journal
Carbon–oxygen (CO) detonation with reactions terminating either after burning of ^12 C in the leading ^12 C +  ^12 C reaction or after burning of ^12 C and ^16 O to Si-group elements may occur in the low-density outer layers of exploding white dwarfs and
A. Khokhlov, I. Domínguez, A. Y. Chtchelkanova, P. Hoeflich, E. Baron, K. Krisciunas, M. Phillips, N. Suntzeff, L. Wang   +8 more
doaj   +1 more source

Photometric typing of normal and peculiar type Ia supernovae

, 2015
Indexación: ScopusWe present a new photometric typing technique for normal type Ia supernovae (SNe Ia) and peculiar SNe Ia such as SN 1991bg-like, type Iax and super-Chandrasekhar SNe Ia.
González-Gaitán, Santiago, Bufano, Filomena   +1 more
core   +1 more source

SN 2024gy: Multiepoch Spectroscopic Features Suggestive of Delayed Detonation in a Type Ia Supernova

The Astrophysical Journal
We present photometric and spectroscopic observations of SN 2024gy, a Type Ia supernova (SN Ia) exhibiting high-velocity features (HVFs) in its early-time spectra. This SN reaches a peak B -band magnitude of −19.25 ± 0.29 mag and subsequently declines by
Liping Li, Zhenyu Wang, Jialian Liu, Yu Pan, Alexei V. Filippenko, Jujia Zhang, Xiaofeng Wang, Brajesh Kumar, Yi Yang, Thomas G. Brink, WeiKang Zheng, Xiangcun Meng, Lingzhi Wang, Zeyi Zhao, Qian Zhai, Yongzhi Cai, Giuliano Pignata, Xinlei Chen, Xingzhu Zou, Jiewei Zhao, Xiangkun Liu, Xiaowei Liu, Xinzhong Er, A. Reguitti, R. Michael Rich, Jon M. Rees, Mark A. Croom, Osmin Caceres, K. Itagaki, Bo Wang, Jinming Bai   +30 more
doaj   +1 more source

Detection of Persistent Helium Absorption in the 91bg-like Type Ia Supernova 2022an

The Astrophysical Journal Letters
We present optical and near-infrared (NIR) observations of the fast-declining Type Ia supernova (SN Ia) 2022an. The photometric and spectroscopic properties identify it as a standard 91bg-like event; however, our data reveal a relatively narrow ...
Ping Chen, Avishay Gal-Yam, Subo Dong, Renyue Cen, Boaz Katz, Kate Maguire, Steve Schulze, Jesper Sollerman, Joseph P Anderson, Ting-Wan Chen, L. Galbany, Mariusz Gromadzki, Chang Liu, Adam A. Miller, Tomás E. Müller-Bravo, Tanja Petrushevska, Giuliano Pignata   +16 more
doaj   +1 more source

Type Ia Supernovae

, 2012
Supernovae are some of the brightest and most energetic explosions in the universe. In the mid- to late-twentieth century, it was discovered that Type Ia supernovae, the brightest and most homogeneous subtype, are a different breed from the rest ...
Johnson, Traci Lin
core  

SN 2023ehl: A Normal Type Ia Supernova with High-velocity Features

The Astrophysical Journal
SN 2023ehl, a normal Type Ia supernova with a typical decline rate, was discovered in the galaxy UGC 11555 and offers valuable insights into the explosion mechanisms of white dwarfs.
Xiangyun Zeng, Lei Hu, Sheng Zheng, Xiaolong Li, Xiaoyu Luo, Sai Li, D. Andrew Howell, Yize Dong, Stefano Valenti, Liping Fu, Cheng Liu, Shiyu Li, Shuguang Zeng, Yao Huang, Yijing Luo, K. Azalee Bostroem, Curtis McCully, Ali Esamdin, Moira Andrews, Joseph R. Farah, Megan Newsome, Giacomo Terreran, Estefania Padilla Gonzalez, Emily Hoang, Aravind Pazhayath Ravi, Darshana Mehta, Nicolas Meza Retamal, Peng Zhang, Rongjun Zhang, Wang Li, Haonan Zhang   +30 more
doaj   +1 more source

Type Ia Supernovae Inside Planetary Nebulae (SNIPs)

, 2015
We estimate that the fraction of type Ia supernovae (SNe Ia) exploding inside planetary nebulae (PNe), termed SNIPs, is at least 20%. We based this on (i) sodium absorption lines in some SN Ia, (ii) hydrogen emission line from circumstellar matter, and ...
D. Tsebrenko, N. Soker
core   +1 more source

Turbulence-Flame Interaction on the Early Evolution of Flames in Type Ia Supernovae

, 2011
Type Ia supernovae are bright stellar explosions thought to occur when a runaway thermonuclear reaction incinerates a compact star known as white dwarf (WD).
Jackson, Aaron P., Chamulak, David A., Townsley, Dean M., Timmes, F.X., Calder, Alan C., Brown, Edward F.   +5 more
core  

K-corrections and Extinction Corrections for Type Ia Supernovae [PDF]

, 2002
The measurement of the cosmological parameters from Type Ia supernovae hinges on our ability to compare nearby and distant supernovae accurately. Here we present an advance on a method for performing generalized K-corrections for Type Ia supernovae which
Peter Nugent, Perlmutter, Saul, Nugent, Peter, Saul Perlmutter, Kim, Alex, Alex Kim   +5 more
core  

The Hubble Constant from Blue Type Ia Supernovae

The Astrophysical Journal
There is a persistent tension of about 5 σ –6 σ between the value of the Hubble constant, as derived from the local distance ladder versus the cosmic microwave background, signaling either unaccounted for systematics in the measurements or “new physics,”
Christa Gall, Luca Izzo, Radosław Wojtak, Jens Hjorth   +3 more
doaj   +1 more source