Are tides responsible for enhanced MG II emission in late-type binaries?

Details Are tides responsible for enhanced MG II emission in late-type binaries? Are tides responsible for enhanced MG II emission in late-type binaries?

Jan 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...189..199g&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 189, no. 1-2, Jan. 1988, p. 199-203. Research supported by Polska Akademia Nau

Astronomy and Astrophysics

Astrophysics

12

Binary Stars, Chromosphere, Late Stars, Magnesium, Stellar Magnetic Fields, Stellar Spectra, Tides, Bolometers, Emission Spectra, G Stars, K Stars

Scientific paper

Mg II h and k fluxes are measured for a homogeneous sample of 30 G III and K III binaries. The spectra have been obtained from the IUE archive and calibrated in absolute units (erg cm-2s-1). Contrary to the generally accepted view that the rate of rotation is responsible for the enhanced chromospheric activity, the Mg II h and k fluxes correlate much better with parameters containing the separation of components in binary systems. It is suggested that the enhanced chromospheric emission in late-type giant binary systems is due to tides rather than to rotational velocities.

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