Other
Scientific paper
Mar 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...326..300l&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 326, March 1, 1988, p. 300-304.
Other
20
Dwarf Stars, Flare Stars, M Stars, Radio Emission, Stellar Radiation, Circular Polarization, Masers, Narrowband, Wave Generation
Scientific paper
The VLA has been used in the spectral-line mode to obtain the frequency spectra of the radiation from the dwarf M star YZ Canis Minoris at frequencies near 1465 MHz. The authors present observations of frequency structure with narrow bandwidths Δν ≈ 30 MHz that persist over 10 minutes of time without evidence for a drift. The fractional bandwidth Δν/ν ≈ 0.02. It is shown that radiation over other 10 minute intervals appears to be broad band with Δν ≥ 50 MHz, but these spectra could represent the time average of many rapid, narrow-band events. The authors interpret the narrow-band, 30 MHz structure in terms of electron-cyclotron maser emission. They also draw attention to certain solar bursts that may require a similar coherent radiation mechanism.
Lang Kenneth R.
Willson Robert F.
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