Results 61 to 70 of about 197,763 (248)

Generation of Cosmic rays in Historical Supernova Remnants

EPJ Web of Conferences, 2013
We present the results of observations of two types of Galactic supernova remnants with the SHALON mirror Cherenkov telescope of Tien-Shan high-mountain Observatory: the shell-type supernova remnants Tycho, Cas A and IC 443; plerions Crab Nebula, 3c58 ...
Sinitsyna V.Y., Sinitsyna V.G.
doaj   +1 more source

MHD Interaction of Pulsar Wind Nebulae with SNRs and the ISM

, 2005
In the late 1960s the discovery of the Crab pulsar in its associated supernova remnant, launched a new field in supernova remnant research: the study of pulsar-driven or plerionic supernova remnants.
Arzoumanian, Begelman, Blondin, Bucciantini, Bucciantini, Bucciantini, Chevalier, Chevalier, Cioffi, Del Zanna, E. van der Swaluw, Gaensler, Garcia-Segura, Heger, Hoshino, Kennel, Komissarov, McKee, McKee, Pacini, Rees, Reynolds, Stappers, Truelove, van der Swaluw, van der Swaluw, van der Swaluw, van der Swaluw, van der Swaluw   +28 more
core   +2 more sources

Modeling of the Radio Emission from the Vela Supernova Remnant [PDF]

, 2013
Supernova remnants (SNRs) are widely considered to be sites of Galactic cosmic ray (CR) acceleration. Vela is one of the nearest Galactic composite SNRs to Earth accompanied by the Vela pulsar and its pulsar wind nebula (PWN) Vela X.
I. Sushch, B. Hnatyk
semanticscholar   +1 more source

Supernova remnant S147 and its associated neutron star(s)

, 2005
The supernova remnant S147 harbors the pulsar PSR J0538+2817 whose characteristic age is more than an order of magnitude greater than the kinematic age of the system (inferred from the angular offset of the pulsar from the geometric center of the ...
Anderson, Arnal, Bethe, Blondin, Bock, Cioffi, Colpi, Cordes, Drew, Fesen, Fürst, Gaensler, Gondhalekar, Gott, Gvaramadze, Gvaramadze, Gvaramadze, Hobbs, Iben, Illarionov, Kirshner, Kramer, Kundu, Lewandowski, Lozinskaya, Manchester, McGowan, Migliazzo, Milne, Morris, Ng, Phillips, Phillips, Reich, Romani, Sallmen, Sofue, Souvageot, Spruit, Sun, Tauris, Tenorio-Tagle, V. V. Gvaramadze, van Buren, van den Bergh, Vanbeveren, Vlemmings, Wex, Yakovlev   +48 more
core   +1 more source

Logarithmic and Strong Coupling Models in Weyl‐Type f(Q,T)$f(Q,T)$ Gravity

Annalen der Physik, EarlyView.
This work explores Weyl‐type f(Q,T) gravity using recent observational datasets — CC, Pantheon+, Union 3.0, and DESI DR2. Through MCMC analysis of logarithmic and strong coupling models, the study reveals a transition from deceleration to acceleration, quintessence‐to‐phantom dynamics, and late‐time consistency with LCDM, offering a geometry‐driven ...
Rahul Bhagat, S. K. Tripathy, B. Mishra
wiley   +1 more source

The Masses of Supernova Remnant Progenitors in M33

The Astrophysical Journal, 2023
Using resolved optical stellar photometry from the Panchromatic Hubble Andromeda Treasury Triangulum Extended Region survey, we measured the star formation history near the position of 85 supernova remnants (SNRs) in M33.
Brad Koplitz, Jared Johnson, Benjamin F. Williams, Mariangelly Díaz-Rodríguez, Jeremiah W. Murphy, Margaret Lazzarini, Joseph Guzman, Julianne J. Dalcanton, Andrew Dolphin, Meredith Durbin   +9 more
doaj   +1 more source

Radial Velocity Monitoring and Analysis of Gaia Astrometry of Selected Intermediate Mass Stars to Constrain Their Multiplicity Status

Astronomische Nachrichten, EarlyView.
ABSTRACT We present new radial velocity measurements of 13 selected intermediate mass stars (2–6 M⊙). The measurements were performed between 29 April and 6 September 2024 at the University Observatory Jena using the échelle spectrograph FLECHAS. The radial velocity of eight stars was found to be constant during our spectroscopic monitoring, namely: 17
J. Bätz, M. Mugrauer, K.‐U. Michel, J. Reichert, A. Tschirschky, L. Pietsch, F. Edelmann, R. Neuhäuser   +7 more
wiley   +1 more source

What Produced the Ultraluminous Supernova Remnant in NGC 6946? [PDF]

, 1999
The ultraluminous supernova remnant (SNR) in NGC 6946 is the brightest known SNR in X-rays, ~1000 times brighter than Cas A. To probe the nature of this remnant and its progenitor, we have obtained high-dispersion optical echelle spectra.
Battinelli P., Blair W. P., Bryan C. Dunne, Caraveo P. A., D’Odorico S., Esteban C., Garcia-Segura G., Garcia-Segura G., Magnier E. A., Mills B. Y., Robert A. Gruendl, Schlegel E. M., You-Hua Chu   +12 more
core   +3 more sources

Aluminum versus Gallium: Differences in Bis(bis(trimethylsilyl)methyl) Element Halides, Hydrides, and Oxygen‐Bridged E/P Frustrated Lewis Pairs

ChemistryEurope, EarlyView.
Reacting Bis2GaBr (Bis = CH(SiMe3)2) with Bis2AlH selectively yields Bis2GaH, a monomeric hydride in solution, characterized by diffusion ordered spectroscopy NMR, infrared spectroscopy and indirectly via hydrogallation. A one‐pot route enables frustrated Lewis pairs Bis2EOPtBu2 (E = Al, Ga), with the gallium analog splitting H2 and showing a dynamic ...
Julian Buth, Maximilian J. Klingsiek, Yury V. Vishnevskiy, Andreas Mix, Jan-Hendrik Lamm, Beate Neumann, Hans-Georg Stammler, Norbert Werner Mitzel   +7 more
wiley   +1 more source

PERIODIC AND SPORADIC VARIATIONS IN THE SPECTRAL FLUX DENSITY OF THE CAS A SUPERNOVA REMNANT [PDF]

Radio Physics and Radio Astronomy, 2020
Purpose: Based on the long-term study data in all radio spectrum ranges, the nature of deviations of spectral flux density of the Cas A supernova remnant from the tendency of its secular decrease is considered.
A. A. Gorbunov, M. I. Ryabov, A. L. Sukharev, V. V. Bezrukovs   +3 more
doaj   +1 more source