Results 51 to 60 of about 8,434 (211)

Optical observations of the fast declining Type Ib supernova iPTF13bvn [PDF]

Monthly Notices of the Royal Astronomical Society, 2014
We present optical UBVRI photometry and medium resolution spectroscopy of the type Ib supernova iPTF13bvn, spanning a phase of $\sim$ $-13\,$d to $+71\,$d with respect to $B$-band maximum. The post maximum decline rates indicate a fast decline with $ m_{15}(B) = 1.82$.
Srivastav, Shubham, Anupama, G. C., Sahu, D. K.   +2 more
openaire   +2 more sources

Dramatic Rebrightening of the Type-changing Stripped-envelope Supernova SN 2023aew

The Astrophysical Journal
Multipeaked supernovae with precursors, dramatic light-curve rebrightenings, and spectral transformation are rare, but are being discovered in increasing numbers by modern night-sky transient surveys like the Zwicky Transient Facility.
Yashvi Sharma, Jesper Sollerman, Shrinivas R. Kulkarni, Takashi J. Moriya, Steve Schulze, Stan Barmentloo, Michael Fausnaugh, Avishay Gal-Yam, Anders Jerkstrand, Tomás Ahumada, Eric C. Bellm, Kaustav K. Das, Andrew Drake, Christoffer Fremling, David Hale, Saarah Hall, K. R. Hinds, Theophile Jegou du Laz, Viraj Karambelkar, Mansi M. Kasliwal, Frank J. Masci, Adam A. Miller, Guy Nir, Daniel A. Perley, Josiah N. Purdum, Yu-Jing Qin, Nabeel Rehemtulla, R. Michael Rich, Reed L. Riddle, Antonio C. Rodriguez, Sam Rose, Jean Somalwar, Jacob L. Wise, Avery Wold, Lin Yan, Yuhan Yao   +35 more
doaj   +1 more source

Type Ib and IIb Supernova Progenitors in Interacting Binary Systems [PDF]

The Astrophysical Journal, 2017
Abstract We explore properties of Type Ib and IIb SN progenitors that are produced by stable mass transfer in binary systems using a new grid of stellar evolution models from an initial primary mass in the range of at solar and Large Magellanic Cloud metallicities. We find
Sung-Chul Yoon, Luc Dessart, Alejandro Clocchiatti   +2 more
openaire   +4 more sources

Resurrection of Nonthermal Emissions from Type Ib/c Supernova Remnants

The Astrophysical Journal, 2022
Abstract Supernova remnants (SNRs) are important objects in investigating the links among supernova (SN) explosion mechanism(s), progenitor stars, and cosmic-ray acceleration. Nonthermal emission from SNRs is an effective and promising tool for probing their surrounding circumstellar media (CSM) and, in turn, the stellar evolution and ...
Haruo Yasuda, Shiu-Hang Lee, Keiichi Maeda   +2 more
openaire   +2 more sources

Phosphazene Base Mediated (sp3)CH Functionalization with CO2 and CS2

European Journal of Inorganic Chemistry, Volume 28, Issue 24, August 29, 2025.
Selective deprotonation of HCF3, HC2F5, and CH3CN by the phosphazene base EtP4 in the presence of CO2 or CS2 affords the phosphazenium carboxylates [EtP4H]+[F3CCO2]− and [EtP4H]+[F5C2CO2]−, as well as the corresponding dithiocarboxylates [EtP4H]+[F3CCS2]− and [EtP4H]+[F5C2CS2]−.
Katharina Wels, Beate Neumann, Jan‐Hendrik Lamm, Hans‐Georg Stammler, Berthold Hoge   +4 more
wiley   +1 more source

Characterizing the Rapid Hydrogen Disappearance in SN 2022crv: Evidence of a Continuum between Type Ib and IIb Supernova Properties

The Astrophysical Journal
We present optical and near-infrared (NIR) observations of SN 2022crv, a stripped-envelope supernova in NGC 3054, discovered within 12 hr of explosion by the Distance Less Than 40 Mpc Survey.
Yize Dong, Stefano Valenti, Chris Ashall, Marc Williamson, David J. Sand, Schuyler D. Van Dyk, Alexei V. Filippenko, Saurabh W. Jha, Michael Lundquist, Maryam Modjaz, Jennifer E. Andrews, Jacob E. Jencson, Griffin Hosseinzadeh, Jeniveve Pearson, Lindsey A. Kwok, Teresa Boland, Eric Y. Hsiao, Nathan Smith, Nancy Elias-Rosa, Shubham Srivastav, Stephen Smartt, Michael Fulton, WeiKang Zheng, Thomas G. Brink, Melissa Shahbandeh, K. Azalee Bostroem, Emily Hoang, Daryl Janzen, Darshana Mehta, Nicolas Meza, Manisha Shrestha, Samuel Wyatt, Katie Auchettl, Christopher R. Burns, Joseph Farah, Lluís Galbany, Estefania Padilla Gonzalez, Joshua Haislip, Jason T. Hinkle, D. Andrew Howell, Thomas De Jaeger, Vladimir Kouprianov, Sahana Kumar, Jing Lu, Curtis McCully, Shane Moran, Nidia Morrell, Megan Newsome, Craig Pellegrino, Abigail Polin, Daniel E. Reichart, B. J. Shappee, Maximilian D. Stritzinger, Giacomo Terreran, M. A. Tucker   +54 more
doaj   +1 more source

Magnetorotational Explosions of Core-Collapse Supernovae

Acta Polytechnica CTU Proceedings, 2014
Core-collapse supernovae are accompanied by formation of neutron stars. The gravitation energy is transformed into the energy of the explosion, observed as SN II, SN Ib,c type supernovae.
Gennady S. Bisnovatyi-Kogan, Sergey G. Moiseenko, Nikolay V. Ardeljan   +2 more
doaj   +1 more source

Type Ib/c Supernovae and their Relation to Binary Stars [PDF]

Symposium - International Astronomical Union, 1996
The present understanding of type Ib/c supernovae and their connection to interacting binaries is reviewed. The problems of the classification and the lack of well-observed events exclude direct inference of progenitor characteristics. The absence of hydrogen lines in the observed spectrum, nevertheless, requires restricted evolutionary schemes to ...
openaire   +3 more sources

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

A Search for Extragalactic Fast Blue Optical Transients in ZTF and the Rate of AT2018cow-like Transients

The Astrophysical Journal, 2023
We present a search for extragalactic fast blue optical transients (FBOTs) during Phase I of the Zwicky Transient Facility (ZTF). We identify 38 candidates with durations above half-maximum light 1 day < t _1/2 < 12 days, of which 28 have blue ( g − r ≲ −
Anna Y. Q. Ho, Daniel A. Perley, Avishay Gal-Yam, Ragnhild Lunnan, Jesper Sollerman, Steve Schulze, Kaustav K. Das, Dougal Dobie, Yuhan Yao, Christoffer Fremling, Scott Adams, Shreya Anand, Igor Andreoni, Eric C. Bellm, Rachel J. Bruch, Kevin B. Burdge, Alberto J. Castro-Tirado, Aishwarya Dahiwale, Kishalay De, Richard Dekany, Andrew J. Drake, Dmitry A. Duev, Matthew J. Graham, George Helou, David L. Kaplan, Viraj Karambelkar, Mansi M. Kasliwal, Erik C. Kool, S. R. Kulkarni, Ashish A. Mahabal, Michael S. Medford, A. A. Miller, Jakob Nordin, Eran Ofek, Glen Petitpas, Reed Riddle, Yashvi Sharma, Roger Smith, Adam J. Stewart, Kirsty Taggart, Leonardo Tartaglia, Anastasios Tzanidakis, Jan Martin Winters   +42 more
doaj   +1 more source