Volume 429, Number 3, January III 2005
|Page(s)||1051 - 1055|
|Published online||05 January 2005|
On the potassium-rotation connection in late-type Alpha Persei stars *
Instituto de Astrofísica de Canarias, 38200 La Laguna, Spain e-mail: firstname.lastname@example.org
2 University of Central Florida, Department of Physics, PO Box 162385, Orlando, FL 32816-2385, USA e-mail: email@example.com
3 Centro Galileo Galilei, Apartado 565, 38700 Santa Cruz de La Palma, Spain e-mail: firstname.lastname@example.org
4 Osservatorio Astrofisico de Arcetri, Largo Fermi 5, 50125 Firenze, Italy e-mail: email@example.com
5 Laboratorio de Astrofísica Espacial y Física Fundamental, INTA, Apartado Postal 50727, 28080 Madrid, Spain e-mail: firstname.lastname@example.org
Accepted: 14 September 2004
We present measurements of the line from spectra of 19 late-type members of the αPersei cluster obtained with the Intermediate Dispersion Spectrograph at the Isaac Newton Telescope. These stars span a narrow range of , from 5091 K to 4771 K, and a wide range of values (9 –170 ). For a given star, we find empirically that larger rotational broadening apparently increases the equivalent width of linearly for values from 15 to 75 . This correlation breaks down for 75 . After correction for this effect, we show that the potassium line equivalent widths do not really correlate with .
Key words: line: formation / stars: atmospheres / stars: abundances / stars: activity / stars: late-type / Galaxy: open clusters and associations: alpha Per
© ESO, 2005
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