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| Paper: |
Radio Behavior of Four Southern Non-Thermal O-Type Stars |
| Volume: |
367, Massive Stars in Interactive Binaries |
| Page: |
179 |
| Authors: |
Benaglia, P.; Koribalski, B. |
| Abstract: |
We have conducted high-resolution continuum observations at 1.4 and 2.4 GHz with the ATCA, towards the four southern Of stars: CD-47 4551, HD93129A, HD124314, and HD150136. All stars have been detected at the two frequencies. HD93129A – the only O2 I star catalogued so far, and in a double system – has also been observed at 17.8 and 24.5 GHz. Its radio spectrum, complemented with previous observations at higher frequencies, is analyzed. The interpretation yields the estimate of its mass-loss rate, and a non-thermal spectral index of radiation coming from a putative colliding-wind region. The synchrotron and corresponding inverse-Compton luminosities are derived. |
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