The Magnesium II Index at High Spectral and Temporal Resolution

Details The Magnesium II Index at High Spectral and Temporal Resolution The Magnesium II Index at High Spectral and Temporal Resolution

May 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agusmsa23a..14s&link_type=abstract

American Geophysical Union, Spring Meeting 2005, abstract #SA23A-14

Physics

7507 Chromosphere, 7537 Solar And Stellar Variability, 7549 Ultraviolet Emissions, 7594 Instruments And Techniques

Scientific paper

The Magnesium II core-to-wing ratio is a useful proxy for solar EUV irradiance variability. The SOLar-STellar Irradiance Comparison Experiment (SOLSTICE) on the SOLar Radiation and Climate Experiment (SORCE) has a much higher resolving power than the SBUV instruments that produce the standard NOAA Mg II index. It also has the capability of measuring the index on timescales of minutes rather than once per day. The spectral resolution affects the precision of the Mg II index and we will show how this impacts our ability to measure short-timescale changes in the solar irradiance. We will also discuss the role of higher time cadence observations on the accuracy of the index as a measure of solar irradiance variability.

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