Microwave Emission from Late Type Dwarf Stars UV Ceti and YZ CMi

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Scientific paper

The authors present simultaneous VLA observations of two late type dwarf stars UV Ceti and YZ CMi at 6 and 20 cm. Multiwavelength observations put sufficient constraints on existing interpretations of quiescent radio emission from these stars. They found that the microwave emission is due to gyro-synchrotron radiation of nonthermal electrons having a power law energy distribution. This emission originates from a source whose size is 2 - 3 times larger than the star. The authors estimate a magnetic field of ≡140 G and a density of ⪉2×108cm-3 in the microwave source.

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