LS I +61 303:. Microquasar or not Microquasar?

G.E. ROMERO; M. ORELLANA; A.T. OKAZAKI; S.P. OWOCKI

INTERNATIONAL JOURNAL OF MODERN PHYSICS D

WORLD SCIENTIFIC PUBL CO PTE LTD

Año: 2008 vol. 17 p. 1875 - 1881

0218-2718

LS I +61 303 is a puzzling object detected from radio up to very high-energy gamma-rays. Variability has recently been observed in its high-energy emission. The object is a binary system, with a compact object and a Be star as primary. The nature of the secondary and the origin of the gamma-ray emission are not clearly established at present. Recent VLBA radio data have been used to claim that the system is a Be/neutron star colliding wind binary, instead of a microquasar. We review the main views on the nature of LS I +61 303 and present results of 3D SPH simulations that can shed some light on the nature of the system. Our results support an accretion powered source, compatible with a microquasar interpretation.