Results 101 to 110 of about 49,186 (262)

Neutrino annihilation in Type II supernovae

The Astrophysical Journal, 1987
Neutrino-antineutrino annihilation into electrons and positrons can deposit > 1051 ergs above the neutrino- sphere of a Type II supernova. All species of neutrino contribute roughly equally to the deposited energy. This process, which appears not to have been included in numerical calculations of supernova explosions, may help to drive off the stellar ...
Jeremy Goodman, Arnon Dar, Shmuel Nussinov   +2 more
openaire   +1 more source

Clinical Pharmacology Approaches to Predict Efficacy of Monoclonal Antibodies Against Emerging SARS‐CoV‐2 Variants

Clinical and Translational Science, Volume 18, Issue 12, December 2025.
ABSTRACT The onset of the global COVID‐19 pandemic created an urgent need for therapeutic monoclonal antibody (mAb) development, while the rapid mutation of the SARS‐CoV‐2 virus and emergence of new variants presented a moving target for validation of efficacy. Since it is virtually impossible to conduct randomized controlled trials in the context of a
Qianwen Wang, Ahmed Nader, Amanda Peppercorn, Andrew Skingsley, Emily Lloyd, Alberto O. Stella, Jill Walker, Chad Garner   +7 more
wiley   +1 more source

SN 2022jox: An Extraordinarily Ordinary Type II SN with Flash Spectroscopy

The Astrophysical Journal
We present high-cadence optical and ultraviolet (UV) observations of the Type II supernova (SN), SN 2022jox which exhibits early spectroscopic high-ionization flash features of H i , He ii , C iv , and N iv that disappear within the first few days after ...
Jennifer E. Andrews, Jeniveve Pearson, Griffin Hosseinzadeh, K. Azalee Bostroem, Yize Dong, Manisha Shrestha, Jacob E. Jencson, David J. Sand, S. Valenti, Emily Hoang, Daryl Janzen, M. J. Lundquist, Nicolás Meza, Samuel Wyatt, Saurabh W. Jha, Chris Simpson, Joseph Farah, Estefania Padilla Gonzalez, D. Andrew Howell, Curtis McCully, Megan Newsome, Craig Pellegrino, Giacomo Terreran   +22 more
doaj   +1 more source

Discovery of a Variable Yellow Supergiant Progenitor for the Type IIb SN 2024abfo

The Astrophysical Journal Letters
We report the discovery of a progenitor candidate for the Type IIb SN 2024abfo using multiepoch pre-explosion images from the Hubble Space Telescope and the Dark Energy Camera Legacy Survey.
Zexi Niu, Ning-Chen Sun, Justyn R. Maund, Zhen Guo, Wenxiong Li, Meng Sun, Jifeng Liu   +6 more
doaj   +1 more source

WHY NS AND BH MASS DISTRIBUTION IS BIMODAL?

Odessa Astronomical Publications, 2017
The observed mass distribution for the compact remnants of massive stars (neutron stars and black holes) and its relationship to possible mechanisms for the ejection of the envelopes of type II and Ib/c supernovae is analyzed.
M. E. Prokhorov, K. A. Postnov
doaj   +1 more source

SN 1999ga: a low-luminosity linear type II supernova?

, 2009
Type II-linear supernovae are thought to arise from progenitors that have lost most of their H envelope by the time of the explosion, and they are poorly understood because they are only occasionally discovered. It is possible that they are intrinsically
A. Pastorello, Aldering, Aschenbach, Bajaja, Bajaja, Balinskaya, Barbon, Barbon, Bartel, Bartunov, Bekki, Benetti, Benetti, Benetti, Branch, Buta, Cappellaro, Cappellaro, Cappellaro, Chugai, Chugai, Chugai, Clocchiatti, Crockett, Crockett, Crockett, Dado, de Vaucouleurs, Della Valle, Dessart, Di Carlo, Dolphin, E. Cappellaro, Elmegreen, Elmhamdi, Fassia, Fesen, Fesen, Foley, Fynbo, G. Altavilla, Gal-Yam, Gal-Yam, Gal-Yam, Gal-Yam, Gaskell, Gehrels, Gezari, Hamuy, Harnett, Immler, Immler, J. R. Maund, Landolt, Larsen, Larsen, Leibundgut, Li, Liu, M. Salvo, M. T. Botticella, M. Turatto, Marcaide, Maund, Maund, Maund, Maund, Maíz-Apellániz, Mihos, Miller, Misra, Montes, Nadyozhin, Ofek, Panagia, Pastorello, Pastorello, Pastorello, Pastorello, Pastorello, Pastorello, Pastorello, Patat, Patat, Quimby, R. M. Crockett, R. Martin, Ray, Richardson, Ryder, Ryder, S. Benetti, S. D. Ryder, S. J. Smartt, S. Mattila, S. Taubenberger, Sahu, Schlegel, Schlegel, Schlegel, Smartt, Smartt, Smartt, Swartz, Tsvetkov, Tsvetkov, Turatto, Turatto, Uomoto, van Dyk, van Dyk, van Dyk, Weiler, Whitelock, Woodings, Woosley, Young, Östlin   +117 more
core   +1 more source

SN 2023ixf in Messier 101: The Twilight Years of the Progenitor as Seen by Pan-STARRS

The Astrophysical Journal
The nearby type II supernova, SN 2023ixf in M101 exhibits signatures of early time interaction with circumstellar material in the first week postexplosion. This material may be the consequence of prior mass loss suffered by the progenitor, which possibly
Conor L. Ransome, V. Ashley Villar, Anna Tartaglia, Sebastian Javier Gonzalez, Wynn V. Jacobson-Galán, Charles D. Kilpatrick, Raffaella Margutti, Ryan J. Foley, Matthew Grayling, Yuan Qi Ni, Ricardo Yarza, Christine Ye, Katie Auchettl, Thomas de Boer, Kenneth C. Chambers, David A. Coulter, Maria R. Drout, Diego Farias, Christa Gall, Hua Gao, Mark E. Huber, Adaeze L. Ibik, David O. Jones, Nandita Khetan, Chien-Cheng Lin, Collin A. Politsch, Sandra I. Raimundo, Armin Rest, Richard J. Wainscoat, S. Karthik Yadavalli, Yossef Zenati   +30 more
doaj   +1 more source

Models of Type II Supernova Explosions [PDF]

Highlights of Astronomy, 1986
Present stellar evolution codes predict that stars with He-core masses above approximately 2 M⊙, corresponding to main sequence masses of at least 8 M⊙ burn carbon non-violently. After hydrostatic core carbon burning all those stars contain O-Ne-Mg cores but their further evolution is strongly dependent on the stellar entropy and thus on the main ...
openaire   +1 more source

The Red Supergiant Progenitor Luminosity Problem

The Astrophysical Journal
Analysis of pre-explosion imaging has confirmed red supergiants (RSGs) as the progenitors to Type II-P supernovae (SNe). However, extracting an RSG's luminosity requires assumptions regarding the star’s temperature or spectral type and the corresponding ...
Emma R. Beasor, Nathan Smith, Jacob E. Jencson   +2 more
doaj   +1 more source

Reconciling the Tension between Light-curve Modeling of Type II Supernovae and Neutrino-driven Core-collapse Supernovae Models with Late-phase Spectroscopy

The Astrophysical Journal
Type II supernovae (SNe II) are the most frequently observed outcome of core-collapse explosions and provide a valuable window into the physical mechanisms governing the deaths of massive stars. However, estimates of explosion properties based on optical
Qiliang Fang, Hiroki Nagakura, Takashi J. Moriya   +2 more
doaj   +1 more source