A microwave survey of southern active stars

O. B. Slee, G. J. Nelson, R. T. Stewart, A. E. Wright, J. L. Innis, S. G. Ryan, Alan Vaughan

Research output: Contribution to journalArticlepeer-review


The results of a survey of 153 active-chromosphere stars made with the Parkes 64-m telescope at 5.0/8.4 GHz from 1981 to 1987 are reported. Microwave emission was detected from 70 stars on at least one occasion, with the highest detection rate of 68 percent from the RS CVn group. The Ca II stars and Algol-type binaries yielded detection rates of 44 and 30 percent, respectively. The maximum powers emitted by the stars at 5.0/8.4 GHz ranged over five orders of magnitude, with a median of 2.5 x 10 to the 10th W/Hz. The maximum brightness temperatures had a smaller range of three orders of magnitude, with a median of 3.6 x 10 to the 9th K.
Original languageEnglish
Pages (from-to)659-677
Number of pages19
JournalMonthly Notices of the Royal Astronomical Society
Issue number4
Publication statusPublished - 15 Dec 1987

Cite this