S E M I N A R IDepartament d'Astronomia i Astrofísica
Universitat de València
Optical photometric monitoring of LS I +61 303
Xavier Paredes Fortuny
Departament d'Astronomia i Meteorologia, Universitat de Barcelona
Seminari del departament d'Astronomia i AstrofÃsica
Divendres 25 octubre 2013
Four gamma-ray binaries, namely PSR B1259-63, HESS J0632+057, HD 215227 and LSI+61 303, contain compact objects orbiting around massive Be stars. The nature of the compact object is only known in the case of PSR B1259-63, but the other systems could also contain young non-accreting pulsars with relativistic winds. Around periastron passage the compact objects should produce significant changes in the structure of the Be disks due to gravitational forces and eventually by ram pressure from the pulsar wind. Accurate photometry could be used to constrain the shape of the disk during the periastron passage. In this talk I present an ongoing program to monitor the optical photometry of gamma-ray binaries and show preliminary results for the case of LS I+61 303. I will also briefly talk about my work here, related with relativistic hydrodynamic simulations of these systems.