Astronomy and Astrophysics – Astronomy
Scientific paper
May 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...21012003p&link_type=abstract
American Astronomical Society Meeting 210, #120.03; Bulletin of the American Astronomical Society, Vol. 39, p.245
Astronomy and Astrophysics
Astronomy
Scientific paper
Observations of several infrared absorption lines from the CO molecule have been made with the NSO Array Camera at the McMath/Pierce Telescope at Kitt Peak. The NAC provides cleaner slit spectra than previously obtained with older camera systems, and we are able to fit the CO line profiles to measure line depth, position and width. Spectroheliograms are produced from these quantities,and the observations show the well-known CO limb darkening, emission just above the continuum limb, increasing line width at the limb, and decreased absorption line strength near a hot, presumably magnetic feature. Time sequence observations show solar oscillations in the line strength and central wavelength and continuum brightness, and for the first time oscillations are measured using the CO line width. Velocity maps in the CO lines near the limb show steady horizontal flows in supergranule-like features.
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