Talk detail

Participant	Viganò, Daniele
Institution	University of Alicante - Ctra. San Vicente del Raspeig, s/n. - San Vicente del Raspeig - Comunidad Valenciana - Spain

Session	SF1	Accepted	Yes	Order	9	Time	15'
Talk	Oral abstract	Title	The CCOs puzzle: the hidden magnetic field scenario
Co-authors	Jose Pons
Abstract	The observations of neutron stars near the center of Supernova remnants point to magnetic fields significantly lower than those of normal pulsars. This has led to speculations about their nature in two directions: low magnetic fields at birth (anti-magnetar), or strong, buried, sub-surface fields. We present the first 2D simulations of the latter scenario: the submergence and reemergence of the crustal magnetic field. A post-supernova hypercritical accretion stage of about 1e-4-1e-3 solar masses, onto a large fraction of the surface, is required to deeply bury the magnetic field. When accretion stops, the field reemerges on a timescale that depends on the submergence conditions, varying between 1 and 100 kyr. We conclude that the hidden magnetic field scenario is a viable alternative to the anti-magnetar scenario.