Results 51 to 60 of about 62,408 (256)

Footprints of the Newly-Discovered Vela Supernova in Antarctic Ice Cores? [PDF]

Astropart.Phys.14:1-6,2000, 1999
The recently-discovered, nearby young supernova remnant in the southeast corner of the older Vela supernova remnant may have been seen in measurements of nitrate abundances in Antarctic ice cores. Such an interpretation of this twenty-year-old ice-core data would provide a more accurate dating of this supernova than is possible purely using ...
arxiv   +1 more source

Modern Supernova Search [PDF]

, 2000
Supernovae play a critical role in observational cosmology as well as in astrophysics of stars and galaxies. Recent era has seen dramatic progress in the research of supernovae. Several programs to search systematically supernovae in nearby to distant galaxies have been very successful. Recent progresses in the modern supernova search are reviewed.
arxiv   +1 more source

Supernova Rates [PDF]

International Astronomical Union Colloquium, 1996
Extragalactic supernova rates are reviewed. The main uncertainties in calculated rates are due to (1) the influence of the (still poorly known) luminosity function of supernova of a given type on “control times”, to (2) uncertain corrections for possible inclination - dependent bias in supernova discovery probabilities, and (3) interstellar absorption.
openaire   +2 more sources

The high energy X-ray probe (HEX-P): science overview

Frontiers in Astronomy and Space Sciences
To answer NASA’s call for a sensitive X-ray observatory in the 2030s, we present the High Energy X-ray Probe (HEX-P) mission concept. HEX-P is designed to provide the required capabilities to explore current scientific questions and make new discoveries ...
Javier A. García, Javier A. García, Daniel Stern, Kristin Madsen, Miles Smith, Brian Grefenstette, Marco Ajello, Jason Alford, Adlyka Annuar, Matteo Bachetti, Mislav Baloković, Mislav Baloković, Ricarda S. Beckmann, Stefano Bianchi, Daniela Biccari, Peter Boorman, Murray Brightman, Johannes Buchner, Esra Bulbul, Chien-Ting Chen, Chien-Ting Chen, Francesca Civano, Joel Coley, Joel Coley, Joel Coley, Riley M. T. Connors, Melania Del Santo, Laura Di Gesu, Paul A. Draghis, Paul A. Draghis, P. Chris Fragile, Andrés Gúrpide, Manuele Gangi, Suvi Gezari, Fiona Harrison, Elias Kammoun, Elias Kammoun, Elias Kammoun, Giorgio Lanzuisi, Bret Lehmer, Anne Lohfink, Renee Ludlam, Stefano Marchesi, Stefano Marchesi, Lea Marcotulli, Lea Marcotulli, Raffaella Margutti, Megan Masterson, Andrea Merloni, Matthew Middleton, Kaya Mori, Alberto Moretti, Kirpal Nandra, Kerstin Perez, Ryan W. Pfeifle, Ryan W. Pfeifle, Ciro Pinto, Joanna Piotrowska, Gabriele Ponti, Katja Pottschmidt, Katja Pottschmidt, Peter Predehl, Simonetta Puccetti, Arne Rau, Stephen Reynolds, Andrea Santangelo, Daniele Spiga, John A. Tomsick, Núria Torres-Albà, Dominic J. Walton, Daniel Wilkins, Joern Wilms, Will Zhang, Xiurui Zhao, Xiurui Zhao   +74 more
doaj   +1 more source

Toward a Standard Model of Core Collapse Supernovae [PDF]

, 2000
In this paper, we discuss the current status of core collapse supernova models and the future developments needed to achieve significant advances in understanding the supernova mechanism and supernova phenomenology, i.e., in developing a supernova standard model.
arxiv   +1 more source

Supernova Statistics [PDF]

International Astronomical Union Colloquium, 2005
SummaryThe statistics of SN discoveries is used to reveal selection biases of past and current SN searches and to gain insight on the progenitor scenarios for the different SN types. We also report estimates of the SN rate per unit mass in galaxies of different types and on the first attempts to study the evolution of the supernova rate with redshift.
Cappellaro, Enrico, Barbon, Roberto, Turatto, Massimo   +2 more
openaire   +2 more sources

Controlling the Orientation of Polar Axis in Chiral Metal‐Halides to Reveal Their Intrinsic Circularly Polarized Luminescence

Advanced Optical Materials, EarlyView.
In chiral and polar metal‐halide single crystals or thin films, the orientation of the main optical axis normal to incident light allows an easy characterization of the chiroptical properties (circular dichroism and circularly polarized luminescence) without artifacts or macroscopic interferences, despite the highly anisotropic nature in this family of
Kostiantyn Tieriekhov, Maria Maniadi, Olivier Ségut, Sylvie Dabos‐Seignon, Arnaud Brosseau, Valérie Dupray, Nicolas Mercier, Alexandre Abhervé   +7 more
wiley   +1 more source

Observational data on galactic supernova remnants: I. The supernova remnants within l = 0◦ - 90◦ [PDF]

Serbian Astronomical Journal, 2003
We have collected all the available data on Galactic supernova remnants given in the literature. The data on Galactic supernova remnants located in the Galactic longitude interval l=0◦-90◦ in all the spectral bands are presented in this work.
Guseinov O.H., Ankaj A., Tagieva S.O.
doaj   +1 more source

Classification of Supernovae [PDF]

, 2003
The current classification scheme for supernovae is presented. The main observational features of the supernova types are described and the physical implications briefly addressed. Differences between the homogeneous thermonuclear type Ia and similarities among the heterogeneous core collapse type Ib, Ic and II are highlighted.
arxiv   +1 more source

Development of Photo‐Biocatalytic Redox System for Asymmetric Synthesis of Optically Active Amines Using Blue Light and Transaminases. A Case Study Toward Mavacamten

Advanced Synthesis &Catalysis, EarlyView.
Abstract α‐Chiral amines are versatile building blocks for the asymmetric synthesis of optically pure high‐added‐value chemicals, including pharmaceuticals, agrochemicals, and natural products. Herein, we report a one‐pot, two‐step sequential deracemization of racemic sec‐alcohols to optically enriched primary amines throught a photo‐biocatalytic ...
Natalia Antos, Aleksandra Rudzka, Anna Hoser, Tamara Reiter, Wolfgang Kroutil, Paweł Borowiecki   +5 more
wiley   +1 more source