Results 31 to 40 of about 11,937,910 (228)
Neutrino Transport in a Type II Supernova Environment [PDF]
International Astronomical Union Colloquium, 1986 AbstractWe discuss the full problem of neutrino transport in the context of a Type II supernova environment. We describe the “standard model” of Type II supernova, which involves the core collapse and core bounce of an 8 — 20M⊙ star. Although the shock produced in the standard model is supposed to expel the outer layers of the star, this does not ...
Paul J. Schinder, Stuart L. Shapiro
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Type II supernova diversity [PDF]
Proceedings of the International Astronomical Union, 2015 AbstractIt is now firmly established that at a significant fraction of hydrogen-rich type II supernovae (SNe II) arise from red supergiant progenitors. However, a large diversity of SN properties exist, and it is presently unclear how this can be understood in terms of progenitor differences and pre-SN stellar evolution. In this contribution, I present
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Nlte-Effects in Supernovae Type II Photospheres [PDF]
Highlights of Astronomy, 1986 AbstractIn order to provide accurate fluxes of supernovae Type II as needed for the application of the Baade-Wesselink method we have constructed spherical model photospheres for these objects under the assumption that hydrogen and helium are in statistical equilibrium.
P. Höflich, R. Wehrse, G. Shaviv
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Type Ia supernovae from sub-Chandrasekhar mass white dwarfs
, 2016 We argue that detonations of sub-Chandrasekhar mass white dwarfs can lead to bright explosions with light curves and spectra similar to those of observed Type Ia supernovae.
Ruiter, A. J. +7 more
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The Astrophysical Journal Letters, 2023 We present preexplosion optical and infrared (IR) imaging at the site of the type II supernova (SN II) 2023ixf in Messier 101 at 6.9 Mpc. We astrometrically registered a ground-based image of SN 2023ixf to archival Hubble Space Telescope (HST), Spitzer ...
Charles D. Kilpatrick +19 more
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On the Explosion of Type II Supernova [PDF]
Progress of Theoretical Physics, 1963 Various nuclear reactions that takes place after the collapse of a stellar core caused by Fe yields He reaction at the iron core of aged massive stars are investigated, and it is shown that an enormous amount of energy from rapid nuclear reactions among light elements such as oxygen and carbon gives rise to the generation of shock waves.
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SN 2023ixf in the Pinwheel Galaxy M101: From Shock Breakout to the Nebular Phase
The Astrophysical JournalWe present photometric and spectroscopic observations of supernova SN 2023ixf covering from day 1 to 442 days after explosion. SN 2023ixf reached a peak V -band absolute magnitude of −18.2 ± 0.07, and light curves show that it has a relatively short ...
WeiKang Zheng +41 more
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A Novel Sparse Cellular Labeling System with Tunable Gradients and Long‐Term Stability
Advanced Science, EarlyView.The Tri‐M (Multi‐recombinase, Multi‐recognition site, and Multi‐nested) sparse cellular labeling system, built upon competitive recombination, integrates transgenic mice with viral injection to achieve tunable and long‐term stable sparse labeling of specific cell types with region selectivity, from sparse populations to individual cells, facilitating ...
Xiaomei Tang +17 more
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SN 2021dbg: A Luminous Type IIP–IIL Supernova Exploding from a Massive Star with a Layered Shell
The Astrophysical JournalWe present extensive observations and analysis of supernova (SN) SN 2021dbg, utilizing optical photometry and spectroscopy. For approximately 385 days following the explosion, SN 2021dbg exhibited remarkable luminosity, surpassing most Type II SNe (SNe ...
Zeyi Zhao +11 more
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Patient‐Derived Fibroblasts as a Clinically Relevant Model of Kearns–Sayre Syndrome
Annals of Neurology, EarlyView.Objective Kearns–Sayre syndrome (KSS) is characterized by single large‐scale mitochondrial DNA deletions and by severe early‐onset clinical manifestations with neurological involvement. Reliable disease models, as well as validated biomarkers or effective treatments, are lacking.
Laura Valls‐Roca +24 more
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