Discovery of Microwave Emission from Four Nearby Solar-Type G Stars

Details Discovery of Microwave Emission from Four Nearby Solar-Type G Stars Discovery of Microwave Emission from Four Nearby Solar-Type G Stars

Aug 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994sci...265..933g&link_type=abstract

Science, Volume 265, Issue 5174, pp. 933-935

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Scientific paper

Radio waves from the sun were detected 50 years ago, but the microwave detection of other single solar-type stars has remained a challenge. Here, the discovery of four solar-type radio stars is reported. These "solar twin" G stars are radio sources up to 3000 times stronger than the quiet sun. The microwaves most likely originate from a large number of relativistic electrons, possibly produced along with coronal heating, a process that is not understood. Two of the stars are younger than the sun and rotate more rapidly; the dynamo process in the stellar interior is therefore presumably more vigorous, resulting in enhanced coronal activity. One of the detections, however, is an old, metal-deficient G dwarf.

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