Title

On the potassium-rotation connection in late-type Alpha Persei stars

Authors

Authors

E. L. Martin; A. Magazzu; R. J. G. Lopez; S. Randich;D. B. Y. Navascues

Comments

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Abbreviated Journal Title

Astron. Astrophys.

Keywords

line : formation; stars : atmospheres; stars : abundances; stars :; activity; stars : late-type; Galaxy : open clusters and associations :; alpha Per; MAIN-SEQUENCE; LITHIUM ABUNDANCES; PLEIADES STARS; STELLAR MODELS; DEPLETION; LINE; Astronomy & Astrophysics

Abstract

We present measurements of the KI lambda7699 line from spectra of 19 late-type members of the alphaPersei cluster obtained with the Intermediate Dispersion Spectrograph at the Isaac Newton Telescope. These stars span a narrow range of T-eff, from 5091 K to 4771 K, and a wide range of v sin i values (9 kms(-1)-170 km s(-1)). For a given star, we find empirically that larger rotational broadening apparently increases the equivalent width of KI lambda7699 linearly for v sin i values from 15 km s(-1) to 75 km s(-1). This correlation breaks down for v sin i > 75 km s(-1). After correction for this effect, we show that the potassium line equivalent widths do not really correlate with v sin i.

Journal Title

Astronomy & Astrophysics

Volume

429

Issue/Number

3

Publication Date

1-1-2005

Document Type

Article

Language

English

First Page

1051

Last Page

1055

WOS Identifier

WOS:000226294600032

ISSN

0004-6361

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