6533b821fe1ef96bd127c4b6
RESEARCH PRODUCT
A Simple Model of Radiative Emission in M87
V. TeresiDiego MolteniGaetano GerardiEnrico Vitanzasubject
PhysicsAngular momentumAstrophysics::High Energy Astrophysical PhenomenaAstrophysics (astro-ph)BremsstrahlungFOS: Physical sciencesAstronomy and AstrophysicsAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysicsAstrophysicsaccretion accretion disks black hole physics hydrodynamicsGalaxyAccretion (astrophysics)Space and Planetary ScienceRadiative efficiencyRadiative transferAstrophysics::Solar and Stellar AstrophysicsAdiabatic processAstrophysics::Galaxy Astrophysicsdescription
We present a simple physical model of the central source emission in the M87 galaxy. It is well known that the observed X-ray luminosity from this galactic nucleus is much lower than the predicted one, if a standard radiative efficiency is assumed. Up to now the main model invoked to explain such a luminosity is the ADAF (Advection-Dominated-Accretion-Flow) model. Our approach supposes only a simple axis-symmetric adiabatic accretion with a low angular momentum together with the bremsstrahlung emission process in the accreting gas. With no other special hypothesis on the dynamics of the system, this model agrees well enough with the luminosity value measured by Chandra.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2005-09-22 | The Astrophysical Journal |