Results 141 to 150 of about 59,386 (288)

Utilising a Proton‐Responsive 1,8‐Naphthyridine Ligand for the Synthesis of Bimetallic Palladium and Platinum Complexes

Chemistry – An Asian Journal, Volume 19, Issue 3, February 1, 2024.
The proton responsive behaviour of the 1,8‐naphthyridine PONNHO ligands can be harnessed to provide nuclearity control, where deprotonation results in a switch from mono‐ to dinucleating coordination. Reduction provides access to planar palladium and platinum bimetallic complexes containing close phosphinite‐naphthyridinone P⋅⋅⋅O interactions ...
Arie J. H. Multem, Andie R. Delaney, Asja A. Kroeger, Michelle L. Coote, Annie L. Colebatch   +4 more
wiley   +1 more source

Shock-cooling Constraints via Early-time Observations of the Type IIb SN 2022hnt

The Astrophysical Journal
We report the results of a rapid follow-up campaign on the Type IIb supernova (SN) 2022hnt. We present a daily, multiband, photometric follow-up using the Las Cumbres Observatory, the Zwicky Transient Facility, the orbiting Swift observatory, and the ...
Joseph R. Farah, D. Andrew Howell, Giacomo Terreran, Ido Irani, Jonathan Morag, Craig Pellegrino, Curtis McCully, Megan Newsome, Estefania Padilla Gonzalez, K. Azalee Bostroem, Griffin Hosseinzadeh, Moira Andrews, Logan Prust, Daichi Hiramatsu   +13 more
doaj   +1 more source

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

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

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

Diffuse neutrino background from past core collapse supernovae. [PDF]

Proc Jpn Acad Ser B Phys Biol Sci, 2023
Ando S, Ekanger N, Horiuchi S, Koshio Y.
europepmc   +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

Discovery and Extensive Follow-up of SN 2024ggi, a Nearby Type IIP Supernova in NGC 3621

The Astrophysical Journal
We present the discovery and early observations of the nearby Type II supernova (SN) 2024ggi in NGC 3621 at 6.64 ± 0.3 Mpc. The SN was caught $5.{8}_{-2.9}^{+1.9}$ hr after its explosion by the ATLAS survey.
Ting-Wan Chen, Sheng Yang, Shubham Srivastav, Takashi J. Moriya, Stephen J. Smartt, Sofia Rest, Armin Rest, Hsing Wen Lin, Hao-Yu Miao, Yu-Chi Cheng, Amar Aryan, Chia-Yu Cheng, Morgan Fraser, Li-Ching Huang, Meng-Han Lee, Cheng-Han Lai, Yu-Hsuan Liu, Aiswarya Sankar.K, Ken W. Smith, Heloise F. Stevance, Ze-Ning Wang, Joseph P. Anderson, Charlotte R. Angus, Thomas de Boer, Kenneth Chambers, Hao-Yuan Duan, Nicolas Erasmus, Michael Fulton, Hua Gao, Joanna Herman, Wei-Jie Hou, Hsiang-Yao Hsiao, Mark E. Huber, Chien-Cheng Lin, Hung-Chin Lin, Eugene A. Magnier, Ka Kit Man, Thomas Moore, Chow-Choong Ngeow, Matt Nicholl, Po-Sheng Ou, Giuliano Pignata, Yu-Chien Shiau, Julian Silvester Sommer, John L. Tonry, Xiao-Feng Wang, Richard Wainscoat, David R. Young, You-Ting Yeh, Jujia Zhang   +49 more
doaj   +1 more source

Magnetic Fields in Core Collapse Supernovae: Possibilities and Gaps

, 2004
Spectropolarimetry of core collapse supernovae has shown that they are asymmetric and often, but not universally, bi-polar. The Type IIb SN1993J and similar events showed large scatter in the Stokes parameter plane.
Akiyama, Shizuka, Wheeler, J. Craig
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