0000000000322652

AUTHOR

Tiziana Bassi

showing 2 related works from this author

Faint γ-ray sources at low redshift: the radio galaxy IC 1531

2018

We present amultiwavelength study of IC 1531 (z=0.02564), an extragalactic radio source associated with the γ -ray object 3FGL J0009.9-3206 and classified as a blazar of uncertain type in the Third Fermi-Large Area Telescope AGN catalog (3LAC). A core-jet structure, visible in radio and X-rays, is enclosed within a ~220 kpc wide radio structure. The morphology and spectral characteristics of the kiloparsec jet in radio and X-rays are typical of Fanaroff-Riley type I galaxies. The analysis of the radio data and optical spectrum and different diagnostic methods based on the optical, infrared, and γ -ray luminosities also support a classification as a low-power RG seen at moderate angles (θ = …

gamma-rays: galaxiesRadio galaxyInfraredGamma-rays: galaxieAstrophysics::High Energy Astrophysical Phenomenagalaxies: activejets [galaxies]AstrophysicsAstrophysics::Cosmology and Extragalactic AstrophysicsGalaxies: jet01 natural sciencesRadio continuum: galaxielaw.inventionTelescopelaw0103 physical sciencesBlazargalaxies: individual: IC 1531010303 astronomy & astrophysicsAstrophysics::Galaxy AstrophysicsPhysicsradio continuum: galaxies010308 nuclear & particles physicsAstronomy and AstrophysicsAstronomy and Astrophysicgalaxies: jetsGalaxyRedshiftgalaxies [radio continuum]galaxies [gamma-rays]Space and Planetary Scienceactive [galaxies]individual: ic 1531 [galaxies]Spectral energy distributionAstrophysics - High Energy Astrophysical Phenomena[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]Fermi Gamma-ray Space Telescope
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Accrétion et éjection dans les systèmes binaires X transitoires à trous noirs : le cas de GRS 1716-249

2020

I buchi neri transienti (BHT) sono tra le sorgenti con emissione ai raggi X più luminose della galassia. Grazie all’elevato flusso in banda X e alla loro alta variabilità temporale. queste sorgenti offrono un’opportunità unica per studiare la fisica dell’accrescimento in straordinareie condizioni fisiche. I BHT mostrano episodici outburst caratterizzati da diverse luminosità in banda X e γ, diverse forme spettrali e proprietà della variabilità temporale. L’obiettivo di questa tesi è lo studio della geometria, dei meccanismi e dei processi fisici coinvolti nell’emissione del buco nero transiente GRS 716-249. Di seguito presento l’analisi spettrale e temporale delle osservazioni della GRS 171…

AccrétionTrou noir physiqueAccretionX-rays : binaries[SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph]Gamma-rays : generalRayons X : binairesgamma-rays: generalBlack hole physicsDisque d'accrétionX-rays: generalRayons X : généralstars: jetsX-rays: binariesSettore FIS/05 - Astronomia E Astrofisicaaccretion accretion discsÉtoiles : jetRayons gamma : généralStars : jetsAccretion discsX-rays : general
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