Search results for " mechanism]"

showing 3 items of 3 documents

Prompt TeV Emission from Cosmic Rays Accelerated by Gamma Ray Bursts Interacting with Surrounding Stellar Wind

2009

11 pages, 1 figure.--ISI article identifier:000263148600009.-- ArXiv pre-print avaible at:http://arxiv.org/abs/0810.1287

Astrofísicaradiation mechanism: non-thermalMesongamma rays: burstsAstrophysics::High Energy Astrophysical PhenomenaNuclear Theorynon-thermal [radiation mechanism]FOS: Physical sciencesSynchrotron radiationCosmic rayAstrophysicsElectronAstrophysics::Cosmology and Extragalactic AstrophysicsStellar-wind bubbleAstrophysicsHigh Energy Physics - Phenomenology (hep-ph)NeutronNuclear ExperimentPhysicstheory [gamma rays]Astrophysics (astro-ph)Gamma raybursts [gamma rays]Astronomy and Astrophysicsgamma rays: theoryHigh Energy Physics - PhenomenologySpace and Planetary ScienceHigh Energy Physics::ExperimentGamma-ray burst
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Detailed study of SNR G306.3–0.9 using XMM-Newton and Chandra observations

2016

Aims. We aim to study the spatial distribution of the physical and chemical properties of the X-ray emitting plasma of the supernova remnant (SNR) G306.3-0.9 in detail to obtain constraints on its ionization stage, the progenitor supernova explosion, and the age of the remnant. Methods. We used combined data from XMM-Newton and Chandra observatories to study the X-ray morphology of G306.3-0.9 in detail. A spatially resolved spectral analysis was used to obtain physical and geometrical parameters of different regions of the remnant. Spitzer infrared observations, available in the archive, were also used to constrain the progenitor supernova and study the environment in which the remnant evol…

Ciencias AstronómicasInfraredCiencias FísicasAstrophysics::High Energy Astrophysical PhenomenaISM [Infrared]FOS: Physical sciencesthermal [radiation mechanism]individual objects: SNR G306.3–0.9 [ISM]AstrophysicsAstrophysics::Cosmology and Extragalactic Astrophysics01 natural sciencesSpectral line//purl.org/becyt/ford/1 [https]ISM: individual objects: SNR G306.3IonizationISM [X-ray]0103 physical sciencesAstrophysics::Solar and Stellar AstrophysicsISM [X-rays]Radio continuum: ISMEjectaSupernova remnant010303 astronomy & astrophysicsISM: supernova remnantAstrophysics::Galaxy AstrophysicsISM: supernova remnantsPhysicsHigh Energy Astrophysical Phenomena (astro-ph.HE)Infrared: ISM010308 nuclear & particles physicssupernova remnants [ISM]Astronomy and AstrophysicsPlasma//purl.org/becyt/ford/1.3 [https]Astronomy and AstrophysicISM: individual objects: SNR G306.3–0.9ISM [Radio continuum]Radiation mechanisms: thermalX-rays: ISMindividual objects: G306.3-0.9 [ISM]Interstellar mediumAstronomíaSupernovathermal [Radiation mechanisms]Space and Planetary ScienceISM; ISM: individual objects: SNR G306.3; ISM: supernova remnants; Radiation mechanisms: thermal; Radio continuum: ISM; X-rays: ISM; Astronomy and Astrophysics; Space and Planetary Science [0.9; Infrared]0.9Astrophysics - High Energy Astrophysical PhenomenaCIENCIAS NATURALES Y EXACTAS
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Shock oscillation model for quasi-periodic oscillations in stellar mass and supermassive black holes

2007

We numerically examine centrifugally supported shock waves in 2D rotating accretion flows around a stellar-mass (10M_sun) and a supermassive (10^6M_sun) black holes over a wide range of input accretion rates of 10^7 >\dot M/\dot M_E>10^{-4}. The resultant 2D-shocks are unstable with time and the luminosities show quasi-periodic oscillations (QPOs) with modulations of a factor of 2-3 andwith periods of a tenth seconds to several hours, depending on the black hole masses. The shock oscillation model may explain the intermediate frequency QPOs with 1-10 Hz observed in the stellar-mass black hole candidates and also suggest the existence of QPOs with the period of hours in AGNs. When the accret…

Shock wavePhysicsSupermassive black holeaccretion accretion discs black hole physics hydrodynamics radiation mechanism: thermal shock wavesStellar massOscillationAstrophysics::High Energy Astrophysical PhenomenaAstronomy and AstrophysicsAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysicsAccretion (astrophysics)Black holeAccretion rateSpace and Planetary ScienceCritical ratethermal shock waves [accretion accretion discs black hole physics hydrodynamics radiation mechanism]Astrophysics::Solar and Stellar AstrophysicsAstrophysics::Galaxy Astrophysics
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