Results 31 to 40 of about 7,335,139 (174)

Ultra-stripped Type Ic supernovae from close binary evolution [PDF]

, 2013
Recent discoveries of weak and fast optical transients raise the question of their origin. We investigate the minimum ejecta mass associated with core-collapse supernovae (SNe) of Type Ic.
Tauris, T. M.; id_orcid, Moriya, T. J., Podsiadlowski, Ph, Langer, N., Yoon, S. -C., Blinnikov, S. I.   +5 more
core   +1 more source

Identifying the True Catalyst: A Mn(II) Salt versus Mn(II) Complexes in Epoxidation with m‐Chloroperbenzoic Acid

European Journal of Organic Chemistry, Volume 28, Issue 30, August 19, 2025.
During the investigation of the reactivity of three Mn complexes, Mn(ClO4)2 shows higher reactivity toward styrene epoxidation, indicating that ligand coordination inhibits the reactivity of the manganese center. Raman spectroscopy provides mechanistic insight: monitoring alkene epoxidation and consumption of the oxidant over time, the true nature of ...
Milica Savić, Aleksandra Mitrović, Božidar Čobeljić, Andrej Pevec, Matija Zlatar, Maja Gruden, Wesley R. Browne, Marika Di Berto Mancini   +7 more
wiley   +1 more source

Toward an inner connection of SNe Ic, SLSNe Ic, XRF connected SNe, SNe Ic-BL, and GRB connected SNe

, 2018
Type Ic supernovae can be classified as normal supernovae Ic, type Ic super-luminous supernovae, X-ray flash-connected supernovae, broad-line supernovae Ic, and gamma-ray burst-connected supernovae.
Zou, Y, Cheng, KS
core   +1 more source

Hubble Space Telescope Deep Upper Limits Rule out a Surviving Massive Binary Companion to the Type Ic Supernova 2012fh

The Astrophysical Journal
Current explanations of the mass-loss mechanism for stripped-envelope supernovae (SNe) remain divided between single and binary progenitor systems. Here we obtain deep ultraviolet (UV) imaging with the Hubble Space Telescope (HST) of the Type Ic SN ...
Benjamin F. Williams, Emmanouil Zapartas, Ori D. Fox, K. Azalee Bostroem, Jianing Su, Brad Koplitz, Schuyler D. Van Dyk, Maria R. Drout, Dimitris Souropanis, Dan Milisavljevic, Stuart D. Ryder, Selma E. de Mink, Nathan Smith, Andrew Dolphin, Alexei V. Filippenko, Jeff J. Andrews, Max M. Briel, Seth Gossage, Matthias U. Kruckow, Camille Liotine, Philipp M. Srivastava, Elizabeth Teng   +21 more
doaj   +1 more source

Organocatalytic C─O Bond Cleavage and Asymmetric Transformations via [1,3]‐Sigmatropic Rearrangement

Advanced Science, Volume 12, Issue 29, August 7, 2025.
A direct asymmetric strategy for fulfilling the functional group transfer by aryl ether cleavage and migration is developed, representing the first Brønsted base‐catalyzed asymmetric [1,3]‐sigmatropic rearrangement reaction. The resulting chiral benzofuran products generated through this strategy exhibit significant 3D‐dimensionality and demonstrate ...
Lei Peng, Yu Chang, Liangchen Yin, Jinbang Zhang, Xuli Feng, Pengfei Wang, Wenling Qin, Hailong Yan   +7 more
wiley   +1 more source

High Rate for Type IC Supernovae [PDF]

, 1991
Using an automated telescope we have detected 20 supernovae in carefully documented observations of nearby galaxies. The supernova rates for late spiral (Sbc, Sc, Scd, and Sd) galaxies, normalized to a blue luminosity of 10{sup 10} L{sub Bsun}, are 0.4 h{
Perlmutter, S., Pennypacker, C R, Marvin-Newberg, H.J., Smith, C.K., Pennypacker, Carl R., Smith, C K, Newberg, H J M, Muller, R.A., Sasseen, T P, Perlmutter, S, Sasseen, T.P., Muller, R A   +11 more
core  

SPY - the ESO Supernovae type Ia Progenitor survey [PDF]

, 2003
Supernovae (SNe) mark the violent termination of a star’s life in an explosion. They are classified according to their light curve as type I or II, with the type I SNe producing very similar light curves, while the SNe type II are more diverse ...
Christlieb, N., Drechsel, H., Pauli, E.M., Koester, D., Yungelson, L., Karl, C., Leibundgut, B., Heber, U., Homeier, D., Moehler, S., Nelemans, G., Renzini, A., Marsh, T.R., Napiwotzki, R., Hagen, H.J., Reimers, D.   +15 more
core   +3 more sources

Evidence against an association between gamma-ray bursts and Type I supernovae

, 1999
We use a rigorous method, based on Bayesian inference, for calculating the odds favoring the hypothesis that any particular class of astronomical transients produce gamma-ray bursts over the hypothesis that they do not.
G. H. Marion, D. Q. Lamb, C. Graziani
core   +1 more source

The Energy Sources, the Physical Properties, and the Mass-loss History of SN 2017dio

The Astrophysical Journal
We study the energy sources, the physical properties of the ejecta and the circumstellar medium (CSM), and the mass-loss history of the progenitor of SN 2017dio, which is a broad-lined Ic (Ic-BL) supernova (SN) having unusual light curves (LCs) and ...
Deng-Wang Shi, Shan-Qin Wang, Wen-Pei Gan, En-Wei Liang   +3 more
doaj   +1 more source

Managing and mitigating future public health risks: Planetary boundaries, global catastrophic risk, and inclusive wealth

Risk Analysis, Volume 45, Issue 7, Page 1607-1631, July 2025.
Abstract There are two separate conceptualizations for assessing existential risks: Planetary Boundaries (PBs) and global catastrophic risks (GCRs). While these concepts are similar in principle, their underpinning literatures tend not to engage with each other.
Eoin McLaughlin, Matthias Beck
wiley   +1 more source