Magnetic Field Decay in the Bipolar Outflow Source Cepheus-A

Details Magnetic Field Decay in the Bipolar Outflow Source Cepheus-A Magnetic Field Decay in the Bipolar Outflow Source Cepheus-A

Sep 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990mnras.246p...3c&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Vol. 246, NO. 1/SEP1, P. 3P, 1990

Astronomy and Astrophysics

Astronomy

14

Scientific paper

Cepheus A is an OH maser source with a clear Zeeman pattern in its OH mainline spectrum at 1665 and 1667 MHz. High-sensitivity spectra, taken over a 10-yr time span show that the Zeeman splitting is decreasing at a rate of 0.4 per cent yr-1. This is interpreted as evidence of magnetic-field decay in the OH maser regions, probably associated with expansion of the gas around a young star.

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