Open AccessRadio observations of IRAS ‐selected Southern hemisphere classical Be stars
Author(s) -
J. S. Clark,
I. A. Steele,
R. P. Fender
Publication year - 1998
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1046/j.1365-8711.1998.01848.x
Subject(s) - physics , astrophysics , southern hemisphere , stars , flux (metallurgy) , radius , wavelength , astronomy , telescope , radio telescope , optics , materials science , computer security , computer science , metallurgy
We present the first radio observations of a sample of 13 optically and IR‐bright Southern hemisphere classical Be stars made from the Australian Telescope Compact Array at 3.5 and 6.3 cm simultaneously. One star, δ Cen, was detected at 3.5 cm, and a second, μ Cen, was also thought to have been detected; further observations of this source are required to confirm this detection. No sources were detected at 6.3 cm, although δ Cen was previously detected at this wavelength by other observers at a higher flux than our detection limit. The radio observations show that the spectral energy distribution undergoes a turnover between the far‐IR and radio wavelengths, as was seen in previous studies. Likewise we find no simple correlation between far‐IR and radio flux. Lower limits to the outer disc radius were found to be of the order of a few hundred solar radii i.e. of the order of those found previously by Taylor et al.