Campana, S. 2011 GRB 101225A的中子星来源解释

主要内容:
认为这个圣诞暴是银河系起源。小行星撞到中子星上去了。

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Title:		A minor body falling onto a neutron star as an explanation for the unusual gamma-ray burst GRB 101225A
Authors:		Campana, S.; Lodato, G.; D'Avanzo, P.; Panagia, N.; Rossi, E. M.; Della Valle, M.; Tagliaferri, G.; Antonelli, L. A.; Covino, S.;Ghirlanda, G.; Ghisellini, G.; Melandri, A.; Pian, E.; Salvaterra, R.; Cusumano, G.; D'Elia, V.; Fugazza, D.; Palazzi, E.;Sbarufatti, B.; Vergani, S. D.
Publication:		eprint arXiv:1112.0018
Publication Date:		11/2011
Origin:		ARXIV
Keywords:		Astrophysics - High Energy Astrophysical Phenomena
Comment:		Published in Nature on Dec 1, 2011. 3 pages, 1 figures (main paper). 15 pages, 4 figures (supplementary information)
Bibliographic Code:		2011arXiv1112.0018C

Abstract

The tidal disruption of a solar mass star around a supermassive black hole has been extensively studied analytically and numerically. In these events the star develops into an elongated banana-shaped structure. After completing an eccentric orbit, the bound debris fall onto the black hole, forming an accretion disk and emitting radiation. The same process may occur on planetary scales, if a minor body orbits too close to its star. In the Solar System, comets fall directly onto our Sun or onto planets. If the star is a compact object, the minor body can become tidally disrupted. Indeed, one of the first mechanisms invoked to produce strong gamma-ray emission involved accretion of comets onto neutron stars in our Galaxy. Here we report that the peculiarities of the `Christmas' gamma-ray burst (GRB 101225A) can be explained by a tidal disruption event of a minor body around a Galactic isolated neutron star. This result would indicate either that minor bodies can be captured by compact stellar remnants more frequently than it occurs in our Solar System or that minor body formation is relatively easy around millisecond radio pulsars. A peculiar Supernova associated to a GRB may provide an alternative explanation.

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