A 1.5 GHz radio survey of the Hyades open stellar cluster

Details A 1.5 GHz radio survey of the Hyades open stellar cluster A 1.5 GHz radio survey of the Hyades open stellar cluster

Feb 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aj....105..563w&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 105, no. 2, p. 563-570.

Astronomy and Astrophysics

Astronomy

9

Open Clusters, Radio Sources (Astronomy), Sky Surveys (Astronomy), Star Clusters, Very Large Array (Vla), Astronomical Catalogs, Binary Stars, Pre-Main Sequence Stars, White Dwarf Stars

Scientific paper

Results of a radio survey of the Hyades open stellar cluster carried out with the VLA at 1.5 GHz are reported. Seventeen fields containing over 150 cataloged stars were mapped down to a limiting sensitivity ranging from 0.3 mJy at the centers of the fields to 0.9 mJy at a distance of 20 arcmin from field centers. Two stars were detected as radio sources: the evolved spectroscopic binary V471 Tau, consisting of a white dwarf and a red dwarf; and the apparently premain-sequence G+K star spectroscopic binary HD 27130. The failure to detect any single stars as radio sources is generally consistent with the age-rotation-activity paradigm, according to which stellar activity is due to magnetic fields produced by dynamo action in rapidly rotating stars and should decrease with age as a star spins down due to magnetic braking. It is concluded that the Hyades M dwarf population is not more active at radio wavelengths than the nearby flare star population, or else the number of flare stars in the Hyades is much less than presently assumed.

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