| Popis: |
The nature of the Wolf-Rayet system WR 147 (alias AS 431) as a strong x-ray source and moderately strong radio emitter (around 35 mJy) was discovered by Caillault et al. (1985). Their initial VLA observations showed it to be a partially resolved radio source, suggesting that a thermal wind model might explain the radio emission, but the unusually high value for the mass-loss rate M derived from thermal wind models and the essentially flat spectral index at the observed frequency range pointed instead to a non-thermal origin for the emission. |
