AAS 205th Meeting, 9-13 January 2005
Session 9 NURO Asteroids and Stars
Poster, Monday, January 10, 2005, 9:20am-6:30pm, Exhibit Hall

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[9.07] Photometric Variations in Spotted Pleiades Stars as Probes of Long-Term Activity Cycles

E. Bardenett, J.B. Milingo (Franklin & Marshall College), L.A. Marschall (Gettysburg College), D.E. Backman (Franklin & Marshall College)

Through the collaborative efforts of undergraduates and faculty at Franklin & Marshall and Gettysburg Colleges, we present new photometric data for 3 K-type stars in the Pleiades. Continuing 8+ years of observations, this data contributes to the long-term study of photometric variations in these stars. These young stars have rotational light curves with V-band amplitudes of a few percent (up to 10% in the most active stars) due to large photospheric active regions or "starspots". Quantifying the level of starspot activity from year to year allows us to look for long-term trends analogous to the solar sunspot cycle. These observations were acquired with the National Undergraduate Research Observatory's (NURO) 31" telescope, which is operated by Lowell Observatory and Northern Arizona University. This work is supported by Franklin & Marshall College, the Delaware Space Grant Consortium, and Arizona Space Grant (NASA Space Grant programs).

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Bulletin of the American Astronomical Society, 36 5
© 2004. The American Astronomical Society.