Results 71 to 80 of about 8,434 (211)

Late-time Optical and X-Ray Emission Evolution of the Oxygen-rich SN 1996cr

The Astrophysical Journal
When the ejecta of a supernova (SN) interact with the progenitor star's circumstellar environment, a strong shock is driven back into the ejecta, causing the material to become bright optically and in X-rays.
Daniel Patnaude, Kathryn E. Weil, Robert A. Fesen, Dan Milisavljevic, Ralph P. Kraft   +4 more
doaj   +1 more source

Resurrection of Type IIL Supernova 2018ivc: Implications for a Binary Evolution Sequence Connecting Hydrogen-rich and Hydrogen-poor Progenitors

The Astrophysical Journal Letters, 2023
Long-term observations of synchrotron emission from supernovae (SNe), covering more than a year after the explosion, provide a unique opportunity to study the poorly understood evolution of massive stars in the final millennium of their lives via changes
Keiichi Maeda, Tomonari Michiyama, Poonam Chandra, Stuart Ryder, Hanindyo Kuncarayakti, Daichi Hiramatsu, Masatoshi Imanishi   +6 more
doaj   +1 more source

Type Ibc supernovae in disturbed galaxies: evidence for a top-heavy IMF

, 2010
We compare the radial locations of 178 core-collapse supernovae to the R-band and H alpha light distributions of their host galaxies. When the galaxies are split into `disturbed' and `undisturbed' categories, a striking difference emerges.
Anderson, Barbon, Bartko, Barton, Bartunov, Bastian, Cappellaro, Conselice, Conselice, Ellison, Figer, Gibson, Heger, J. P. Anderson, Joseph, Joseph, Kankare, Krumholz, Lotz, Mattila, P. A. James, Paumard, Petrosian, Petrosian, Portegies Zwart, Richardson, Richardson, Rupke, S. M. Habergham, Shaw, Tremonti, Wainwright   +31 more
core   +1 more source

Optical Spectroscopy of Type Ib/c Supernovae

, 2001
Accepted for publication in the March issue of AJ.
Matheson, Thomas, Filippenko, Alexei V., Li, Weidong, Leonard, Douglas C., Shields, Joseph C.   +4 more
openaire   +2 more sources

Evolutionary Models for Type Ib/c Supernova Progenitors [PDF]

Publications of the Astronomical Society of Australia, 2015
AbstractSNe Ib/c mark the deaths of hydrogen-deficient massive stars. The evolutionary scenarios for SNe Ib/c progenitors involve many important physical processes including mass loss by winds and its metallicity dependence, stellar rotation, and binary interactions. This makes SNe Ib/c an excellent test bed for stellar evolution theory.
openaire   +2 more sources

Demographic History and Inbreeding in Two Declining Sea Duck Species Inferred From Whole‐Genome Sequence Data

Evolutionary Applications, Volume 17, Issue 9, September 2024.
ABSTRACT Anthropogenic impact has transitioned from threatening already rare species to causing significant declines in once numerous organisms. Long‐tailed duck (Clangula hyemalis) and velvet scoter (Melanitta fusca) were once important quarry sea duck species in NW Europe, but recent declines resulted in their reclassification as vulnerable on the ...
María I. Cádiz, Aja Noersgaard Buur Tengstedt, Iben Hove Sørensen, Emma Skindbjerg Pedersen, Anthony David Fox, Michael M. Hansen   +5 more
wiley   +1 more source

SN 2019tsf: Evidence for Extended Hydrogen-poor CSM in the Three-peaked Light Curve of Stripped Envelope of a Type Ib Supernova

The Astrophysical Journal
We present multiband ATLAS and ZTF photometry for SN 2019tsf, a Type Ib stripped-envelope supernova (SESN). The slow spectral evolution could be associated with an uncommon explosion mechanism specific to this SN.
Yossef Zenati, Qinan Wang, Alexey Bobrick, Lindsay DeMarchi, Hila Glanz, Mor Rozner, Jacob E. Jencson, Armin Rest, Brian D. Metzger, Raffaella Margutti, Sebastian Gomez, Nathan Smith, Silvia Toonen, Joe S. Bright, Colin Norman, Ryan J. Foley, Alexander Gagliano, Julian H. Krolik, Stephen J. Smartt, Ashley V. Villar, Gautham Narayan, Ori Fox, Katie Auchettl, Daniel Brethauer, Alejandro Clocchiatti, Sophie V. Coelln, Deanne L. Coppejans, Georgios Dimitriadis, Andris Dorozsmai, Maria Drout, Wynn Jacobson-Galan, Bore Gao, Ryan Ridden-Harper, Charles Donald Kilpatrick, Tanmoy Laskar, David Matthews, Sofia Rest, Ken W. Smith, Candice McKenzie Stauffer, Michael C. Stroh, Louis-Gregory Strolger, Giacomo Terreran, Justin D. R. Pierel, Anthony L. Piro   +43 more
doaj   +1 more source

The Central Engine of GRB170817A and the Energy Budget Issue: Kerr Black Hole versus Neutron Star in a Multi-Messenger Analysis

Universe, 2023
Upcoming LIGO–Virgo–KAGRA (LVK) observational runs offer new opportunities to probe the central engines of extreme transient events. Cosmological gamma-ray bursts (GRBs) and core-collapse supernovae (CC-SNe), in particular, are believed to be powered by ...
Maurice H. P. M. van Putten
doaj   +1 more source

Swift Observations of X-ray supernovae [PDF]

, 2011
We present a result of X-ray supernovae (SNe) survey using the Swift satellite public archive. An automatic searching program was designed to search X-ray SNe among all of the Swift archival observations between November 2004 and February 2011. Using the
Li, K. L., Pun, Chun. S. J.
core  

Inhomogeneities in type Ib/c supernovae: An inverse Compton scattering origin of the X-ray emission

, 2013
Inhomogeneities in a synchrotron source can severely affect the conclusions drawn from observations regarding the source properties. However, their presence is not always easy to establish, since several other effects can give rise to similar observed ...
Bjornsson, C. -I.
core   +1 more source