An OH maser outburst in Cepheus A

Details An OH maser outburst in Cepheus A An OH maser outburst in Cepheus A

Sep 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985mnras.216p..51c&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 216, Sept. 15, 1985, p. 51P-56P.

Astronomy and Astrophysics

Astronomy

19

Cepheus Constellation, Hydrogen Clouds, Hydroxyl Emission, Interstellar Masers, Circular Polarization, Flares, Radial Velocity

Scientific paper

A remarkable outburst is reported in the OH maser emission from Cepheus A at 1665 MHz. A new flare feature at -8.9 km s-1 has appeared in the spectrum. It increased in flux by a factor of over 250 in 16 months to reach a maximum in 1985 February and is now decaying at a slower rate. It is at least 98 per cent left-hand circularly polarized. Several weaker features have also appeared in the 1665-MHz spectrum, and one of the previously known features has undergone rapid variations in flux.

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