Exploring the powering source of the TeV X-ray binary LS 5039 - Astrophysics > High Energy Astrophysical PhenomenaReportar como inadecuado




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Abstract: LS 5039 is one of the four TeV emitting X-ray binaries detected up to now.The powering source of its multi-wavelength emission can be accretion in amicroquasar scenario or wind interaction in a young non-accreting pulsarscenario. These two scenarios predict different morphologic and peak positionchanges along the orbital cycle of 3.9 days, which can be tested atmilliarcsecond scales using VLBI techniques. Here we present a campaign of 5GHz VLBA observations conducted in June 2000 2 runs five days apart. Theresults show a core component with a constant flux density, and a fast changein the morphology and the position angle of the elongated extended emission,but maintaining a stable flux density. These results are difficult to fitcomfortably within a microquasar scenario, whereas they appear to be compatiblewith the predicted behavior for a non-accreting pulsar.



Autor: J. Moldon 1, M. Ribo 1, J. M. Paredes 1, J. Marti 2, M. Massi 3 1 Universitat de Barcelona, 2 Universidad de Jaen, 3 Max Planck I

Fuente: https://arxiv.org/







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