Sunspot Dynamics as seen with CO 4666nm Spectroscopy
Abstract
High resolution adaptive-optics corrected spectroscopy of sunspots using strong CO absorption lines at 4666nm was performed at the McMath-Pierce Solar Telescope using the NSO Array Camera. Active region NOAA 11158 was observed after the X-class flare on 17 Feb 2011. Several hours of rapid cadence scans reveal changes in umbral bright points, Evershed flows, flows along a sheer zone and penumbral fibrils as seen with the cool CO lines. Solar oscillations are studied, and the chromospheric structure associated with the regions of CO absorption are examined using 854.2nm Ca spectroscopy.
- Publication:
-
American Astronomical Society Meeting Abstracts #220
- Pub Date:
- May 2012
- Bibcode:
- 2012AAS...22020610P