64 citations · 354 across the 18 of their papers we have counts for
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astro-ph.SR2010★ 13 cited
Probing the Solar Atmosphere Using Oscillations of Infrared CO Spectral Lines
Matthew Penn, Tom Schad, Erin Cox
Oscillations were observed across the whole solar disk using the Doppler shift and line depth of spectral lines from the CO molecule near 4666~nm with the National Solar Observator…
astro-ph.SR2010★ 20 cited
Long-term Evolution of Sunspot Magnetic Fields
Matthew Penn, William Livingston
Independent of the normal solar cycle, a decrease in the sunspot magnetic field strength has been observed using the Zeeman-split 1564.8nm Fe I spectral line at the NSO Kitt Peak M…
astro-ph.SR2010
IR spectroscopy of COmosphere dynamics with the CO first overtone band
T. A. Schad, M. J. Penn
We discuss observations of the weak first overtone CO absorption band near 2300 nm with the U.S. National Solar Observatory Array Camera (NAC), a modern mid-infrared detector. This…