Broadband spectral observation of a dMe star radio flare

Details Broadband spectral observation of a dMe star radio flare Broadband spectral observation of a dMe star radio flare

Aug 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...220l...5g&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 220, no. 1-2, Aug. 1989, p. L5-L8.

Astronomy and Astrophysics

Astrophysics

24

Broadband, Radio Stars, Stellar Coronas, Stellar Flares, Stellar Magnetic Fields, Field Strength, Gyrofrequency, Radio Bursts

Scientific paper

A flare on the dMe star AD Leonis was simultaneously observed with the radio telescopes in Effelsberg, Jodrell Bank, and Arecibo using spectrometers at 1665, 1666, and 1415 MHz with bandwidths of 25, 100, and 40 MHz, respectively. The time coincidence confirms the stellar origin of the radiation. The flare emission was resolved into a multitude of broadband pulsations. Their e-folding rise and decay times were of the order of the time resolution of the Effelsberg data (125 ms), or less. The circular polarization was about 100 percent. Similar bursts, but 4 orders of magnitude less powerful, have been observed from the sun at lower frequencies.

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