34th Solar Physics Division Meeting, June 2003
Session 7 Photosphere and Chromosphere I
Poster, Monday, June 16, 2003, 3:30-5:00pm, Mezzanine

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[7.10] Chromospheric Activity in Solar-Type Stars

M.S. Giampapa (NSO/NOAO), J.C. Hall (Lowell Obs.), R.R. Radick (AFGL), S.L. Baliunas (SAO)

We present an update on the results of a survey of chromospheric activity in the solar-age and solar-metallicity open cluster, M67. The objective of the survey is to gain insight on the potential range of amplitudes of the solar cycle through observations of solar analogs that are presumably at random phases in their cycles of magnetic activity. We find that there is a significant overlap of the levels of Ca II H and K emission in the sun-like stars in M67 with the range of activity seen in the contemporary solar cycle. However, there are also stars that exhibit levels of activity outside of this range, including stars that are "super-solar" in their Ca II H and K emission. The implications of these results will be discussed.

The data presented in this investigation were obtained with the WIYN 3.5-m telescope on Kitt Peak. The WIYN Observatory is a joint facility of the University of Wisconsin-Madison, Indiana University, Yale University, and the NOAO. The NSO and the NOAO are operated by AURA for the National Science Foundation.


The author(s) of this abstract have provided an email address for comments about the abstract: giampapa@noao.edu

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Bulletin of the American Astronomical Society, 35 #3
© 2003. The American Astronomical Soceity.