Observational properties of magnetized accretion disks and cosmic censorship

IGNACIO FRANCISCO RANEA SANDOVAL; GARCÍA FEDERICO

Conferencia; High-Energy Phenomena in Relativistic Outflows V; 2015

Observations of X-ray binary systems provide strong evidences of the existence of compact objects too massive for theoretical models of neutron stars to explain. When this systems are in the thermal (high/soft) state their emission spectra in the 0.1-5keV range can be explained by means of the thermal radiation emitted by an accretion disk formed around super-compact objects. The profile of the fluorescent iron line is useful to get insight related with the nature of the compact object.In this work we present thermal spectra, 6.4keV fluorescent iron line profiles obtained using a magnetized Page-Thorne accretion disk model formed both around Kerr black holes and naked singularities (Ranea-Sandoval & García, 2015 Astronomy & Astrophysics, 574, A40). Using the same model we present preliminary results related with the emission from a a corotating hot spot. We incorporated two different magnetic field configurations: uniform and dipolar, using a perturbative scheme in the coupling constant between matter and magnetic field strength. We show that the presence of an external magnetic field produces potentially observable modifications that might be useful to test the nature of the central object. This could be used to analyze the validity of Penrose's cosmic censorship conjecture.