Evaluation of Solar Activity in Multiple Spectral Lines, 1994-1998

Details Evaluation of Solar Activity in Multiple Spectral Lines, 1994-1998 Evaluation of Solar Activity in Multiple Spectral Lines, 1994-1998

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...19510704h&link_type=abstract

American Astronomical Society, 195th AAS Meeting, #107.04; Bulletin of the American Astronomical Society, Vol. 31, p.1531

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Scientific paper

We present a method for evaluating solar and stellar activity in terms of the ensemble behavior of many related spectral lines, rather than using just the classic chromospheric proxy lines such as Ca II H&K. Manifestations of solar and stellar activity that are undetectable in a single spectral line become apparent when many lines are used in tandem. The resulting activity indices (1) allow us to examine solar activity with greater precision than would otherwise be possible and (2) allow us to make meaningful comparisons between the Sun and individual solar analogs. In this poster, we show how these indices have reliably tracked solar activity through the Cycle 22/23 minimum. This work is supported by a grant from the National Science Foundation.

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