Massive non-thermal radio emitters: new data and their modelling

Details Massive non-thermal radio emitters: new data and their modelling Massive non-thermal radio emitters: new data and their modelling

2011-10-12

arxiv.org/abs/1110.2622v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

3 pages, 1 figure, poster at Four Decades of Research on Massive Stars-A Scientific Meeting in Honour of Anthony F.J.Moffat

Scientific paper

During recent years some non-thermal radio emitting OB stars have been discovered to be binary, or multiple systems. The non-thermal emission is due to synchrotron radiation that is emitted by electrons accelerated up to high energies. The electron acceleration occurs at the strong shocks created by the collision of radiatively-driven winds. Here we summarize the available radio data and more recent observations for the binary Cyg OB2 No. 9. We also show a new emission model which is being developed to compare the theoretical total radio flux and the spectral index with the observed radio light curves. This comparison will be useful in order to solve fundamental questions, such as the determination of the stellar mass loss rates, which are perturbed by clumping.

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