AAS Meeting #194 - Chicago, Illinois, May/June 1999
Session 66. Mira Variable Stars
Display, Wednesday, June 2, 1999, 10:00am-6:30pm, Southwest Exhibit Hall

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[66.01] Period Determination of Mira Variables

P. J. Benson, C. L. Ryan (Wellesley C.)

We have observed several Mira-type and suspected Mira variables for up to an eight-year span at Wellesley College’s Whitin Observatory. Periods have been determined for 22 stars for which the period has not previously been determined. We note the presence of a rare "plateau" phenomenon in three of the longer-period variables.

We thank the W. M. Keck Foundation for support of astronomy at Wellesley College through the Keck Northeast Astronomy Consortium, the Wellesley College Fairchild Fellowship for C.R. summer internship, and NSF AST 9417359 and Wellesley College Brachman Hoffman Fellowship for partial support of this research.

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