Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsh23a1622c&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #SH23A-1622
Astronomy and Astrophysics
Astrophysics
7500 Solar Physics, Astrophysics, And Astronomy, 7507 Chromosphere, 7536 Solar Activity Cycle (2162), 7546 Transition Region
Scientific paper
We have observed the solar limb using 1024 × 1024 InSb Near Infrared Camera and Spectroheliograph at McMath-Pierce telescope during the solar minimum period of April 29 to May 1, 2008. A 120 micron slit, corresponding to 0.3 arc second was aligned perpendicular to the solar limb for the observations. The slit spectrum with a resolution of 0.036 Å corresponding to about 05 to 1.0 km/s were obtained in the wavelength regions of HeI 10830 Å, Hydogen Paschen α 12818 Å and Hydrogen Brackett γ 21661 Å. Excellent seeing conditions and the use of adaptive optics produced stable observing conditions during most of the observations. We present the results of line width variation as a function of chromospheric height around the solar limb.
Choudhary D.
Penn Matt J.
Tejomoortula U.
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