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

    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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