Results 81 to 90 of about 201,431 (246)

Trigonal Bipyramidal Clusters [Tl5]7−: Synthesis and Characterization of the Zintl Phase K7−xAxTl5 (A = Rb, Cs; 0 < x ≤ 2.35)

Chemistry – A European Journal, EarlyView.
Mixed alkali metals, potassium and additional rubidium or cesium, allow for the synthesis of a straightforward, electron‐precise Zintl phase K7−xAxTl5. The new phase is characterized by SCXRD, PXRD, and DFT. Its metastability is proven by DSC measurements.
Vanessa F. Schwinghammer, Tomáš Kovářík, Ilya G. Shenderovich, Ján Minár, Stefanie Gärtner   +4 more
wiley   +1 more source

MeerKAT 1.3 GHz Observations of Supernova Remnants

The Astrophysical Journal Supplement Series
We present full Stokes MeerKAT L -band (856–1712 MHz) observations of 36 high-latitude supernova remnants (SNRs). Sensitive, high-dynamic-range images show a wealth of structure. G15.1−1.6 appears to be a H ii region rather than an SNR.
W. D. Cotton, R. Kothes, F. Camilo, P. Chandra, S. Buchner, M. Nyamai   +5 more
doaj   +1 more source

Multiwavelength Signatures of Cosmic Ray Acceleration by Young Supernova Remnants

, 2008
An overview is given of multiwavelength observations of young supernova remnants, with a focus on the observational signatures of efficient cosmic ray acceleration.
Felix A. Aharonian, Frank Rieger, Jacco Vink, Werner Hofmann   +3 more
core   +1 more source

High Resolution Spectroscopy of Balmer-Dominated Shocks in the RCW 86, Kepler and SN 1006 Supernova Remnants [PDF]

, 2003
We report results from high resolution optical spectroscopy of three non-radiative galactic supernova remnants, RCW 86, Kepler's supernova remnant and SN 1006. We have measured the narrow component H-alpha line widths in Balmer-dominated filaments in RCW
Ghavamian, Parviz, Lundqvist, Peter, Smith, R. Chris, Sollerman, Jesper   +3 more
core   +1 more source

Particle Acceleration by Shocks in Supernova Remnants [PDF]

, 2013
Particle acceleration occurs on a range of scales from AU in the heliosphere to Mpc in clusters of galaxies and to energies ranging from MeV to exaelectronvolt (EeV). A number of acceleration processes have been proposed, but diffusive shock acceleration
A. Bell
semanticscholar   +1 more source

Synthesis and Characterization of [MF5(terpy)]+ (M = Mo, W) Salts: Autoionization of MF6 Induced by a Tridentate Ligand

Chemistry – A European Journal, EarlyView.
The hexafluorides MoF6 and WF6 autoionize in the presence of the tridentate terpyridine ligand, yielding [MF5(terpy)]+[MF7]– (M = Mo, W). The octacoordinated [MF5(terpy)]+ cations adopt bicapped trigonal prismatic geometries. The [WF7]– can be substituted for [SbF6]– using SbF5SO2, whereas the reaction was unsuccessful for displacing the [MoF7]– anion.
Miriam D. van Hoeve, Taylor P. K. Adamitz, Felix O'Donnell, Stacey D. Wetmore, Michael Gerken   +4 more
wiley   +1 more source

Three-dimensional Velocity Diagnostics to Constrain the Type Ia Origin of Tycho's Supernova Remnant

The Astrophysical Journal
While various methods have been proposed to disentangle the progenitor system for Type Ia supernovae, their origin is still unclear. A circumstellar environment is key to distinguishing between the double-degenerate and single-degenerate (SD) scenarios ...
Hiroyuki Uchida, Tomoaki Kasuga, Keiichi Maeda, Shiu-Hang Lee, Takaaki Tanaka, Aya Bamba   +5 more
doaj   +1 more source

Shocks and Particle Acceleration in Supernova Remnants: Observational Features

, 2003
The last ten years a number of observational advances have substantially increased our knowledge of shock phenomena in supernova remnants. This progress has mainly been made possible by the recent improvements in X-ray and Gamma-ray instrumentation.
Aharonian, Allen, Allen, Atoyan, Bamba, Bell, Bell, Bell, Berezhko, Biermann, Blandford, Bleeker, Borkowski, Butt, Bykov, Bykov, Cowsik, Decourchelle, Delaney, Dyer, Eichler, Enomoto, Favata, Ghavamian, Ghavamian, Gotthelf, Hamilton, Hughes, Hunter, Itoh, Jacco Vink, Jones, Koyama, Koyama, Lagage, Laming, Laming, Laming, Longair, Malkov, McKee, Muraishi, Reed, Reimer, Reynolds, Reynolds, Reynolds, Rho, Schmitz, Schmitz, Slane, Slane, Smith, Stephenson, Tanimori, Torres, van der Laan, Vink, Vink, Vink, Vink, Vink, Vink, Zeldovich   +63 more
core   +2 more sources

Annihilation emission from young supernova remnants [PDF]

, 2010
A promising source of the positrons that contribute through annihilation to the diffuse Galactic 511keV emission is the beta-decay of unstable nuclei like 56Ni and 44Ti synthesised by massive stars and supernovae.
Aharonian, Badenes, Beacom, Blinnikov, Boehm, Borkowski, Cassam-Chenaï, Chan, Chernyshov, Churazov, Dwarkadas, Dwarkadas, Ferrière, Garcia-Segura, Garcia-Segura, Guessoum, Guessoum, Hachisu, Higdon, Iwamoto, J. Vink, Jean, Jean, Jean, Kalemci, Knödlseder, Krause, Lair, Laming, Leising, Marcaide, Martin, Martin, Milne, Nomoto, P. Jean, P. Martin, Prantzos, R. Diehl, Raymond, Reed, Renaud, Renaud, Reynolds, Roques, S. Jiraskova, Sizun, Strong, Sugerman, The, Truelove, Vedrenne, Vink, Wang, Weidenspointner, Weidenspointner, Willingale, Winkler   +57 more
core   +3 more sources

New Galactic supernova remnants discovered with IPHAS [PDF]

, 2013
As part of a systematic search programme of a 10-degree wide strip of the Northern Galactic plane we present preliminary evidence for the discovery of four (and possibly five) new supernova remnants (SNRs).
L. Sabin, Q. Parker, M. E. Contreras, L. Olgu'in, D. Frew, M. Stupar, R. V'azquez, N. Wright, R. Corradi, R. Morris   +9 more
semanticscholar   +1 more source