Upper limits to the radio-fluxes of the Wolf-Rayet stars WR 46 (WN3p) and WR 50 (WC7+abs)

Details Upper limits to the radio-fluxes of the Wolf-Rayet stars WR 46 (WN3p) and WR 50 (WC7+abs) Upper limits to the radio-fluxes of the Wolf-Rayet stars WR 46 (WN3p) and WR 50 (WC7+abs)

Nov 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000a%26a...363.1026v&link_type=abstract

Astronomy and Astrophysics, v.363, p.1026-1028 (2000)

Astronomy and Astrophysics

Astrophysics

6

Stars: Wolf-Rayet, Stars: Individual: Wr 46 = Hd104994, Stars: Individual: Wr 50, Radio Continuum: Stars

Scientific paper

We have observed the Wolf-Rayet stars WR 46 (WN3p+c) and WR 50 (WC7+abs) at 3 and 6 cm using the Australia Telescope in search of non-thermal radio emission. However, the sources were not detected and we derive upper limits to their radio fluxes of 0.18 mJy (0.15 mJy in the case of WR 46 at 6 cm). These are not in conflict with expected thermal emission, because the wind densities have been found to be lower than an average WR wind. Inversely, assuming the mass-loss rate as determined from optical spectral analyses, the inferred lower limits to the distances are in agreement with previous determinations. Both objects are reported as short-period photometric variables, but we note that the variability of WR 50 is suspicious.

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