Rotational modulation of chromospheric variations of main-sequence stars

Details Rotational modulation of chromospheric variations of main-sequence stars Rotational modulation of chromospheric variations of main-sequence stars

Nov 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...242l..37s&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 242, Nov. 15, 1980, p. L37-L41.

Astronomy and Astrophysics

Astrophysics

30

Chromosphere, Main Sequence Stars, Stellar Atmospheres, Stellar Rotation, Autocorrelation, Data Correlation, Periodic Variations, Stellar Spectra

Scientific paper

The data of Wilson on the Ca H-K flux variations of main-sequence stars have been analyzed for periodicities by an autocorrelation technique which can be successfully employed with the sparse and quasi-periodic sampling schedule used to take the data. Rotational periods are determined for 10 stars. When the rotational frequencies are plotted versus spectral type for these stars and the sun, the results are generally consistent with a rule relating degree and type of chromospheric activity to rotation, postulated on the basis of previous data.

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