Detection of the dMe flare star YZ Canis Minoris simultaneously at 20 and 90 centimeter wavelengths

Details Detection of the dMe flare star YZ Canis Minoris simultaneously at 20 and 90 centimeter wavelengths Detection of the dMe flare star YZ Canis Minoris simultaneously at 20 and 90 centimeter wavelengths

Nov 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...334.1001k&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 334, Nov. 15, 1988, p. 1001-1007.

Astronomy and Astrophysics

Astrophysics

14

Centimeter Waves, Flare Stars, Stellar Coronas, Stellar Flares, Brightness Temperature, Coherent Radiation, Interstellar Magnetic Fields, Polarization, Radio Emission, Very Large Array (Vla)

Scientific paper

The first aperture synthesis detection of the flare star YZ CMi at 90 cm wavelength is presented here. The simultaneous observations carried out at 20 and 90 cm wavelengths show that the emission at the two wavelengths is unipolar in the same sense and is uncorrelated. The high brightness temperature of ≡1013K at 90 cm wavelength strongly supports the coherent nature of the emission. The authors propose that the coherent emission is intrinsically unpolarized and the polarization is introduced by absorption in the higher coronal levels with large-scale magnetic fields, presumably the dipole magnetic field.

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