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The EUV spectrum of sunspot plumes observed by SUMER on SOHO |
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| Authors: | W Curdt B N Dwivedi U Feldman |
| Institution: | (1) Max-Planck-Institut fiir Aeronomie, D-37191 Katlenburg-Lindau, Germany;(2) Department of Applied Physics, Banaras Hindu University, 221005 Varanasi, India;(3) E.O. Hulburt Center for Space Research, NRL, 20375 Washington DC, USA |
| Abstract: | We present results from sunspot observations obtained by SUMER on SOHO. In sunspot plumes the EUV spectrum differs from the quiet Sun; continua are observed with different slopes and intensities; emission lines from molecular hydrogen and many unidentified species indicate unique plasma conditions above sunspots. Sunspot plumes are sites of systematic downflow. We also discuss the properties of sunspot oscillations |
| Keywords: | Sun: EUV spectroscopy sunspot oscillation |
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