The EUV Spectrum of Sunspot Plumes Observed by SUMER on SOHO

Journal of astrophysics and astronomy

W. Curdt1²  B. N. Dwivedi³  U. Feldman¹ 

[1] E.O. Hulburt Center for Space Research, NRL, Washington DC 20375, USA.$$;Max-Planck-Institut für Aeronomie, D-37191, Katlenburg-Lindau, Germany.$$;Department of Applied Physics, Banaras Hindu University, Varanasi-221005, India.$$

关键词: Sun: EUV spectroscopy;    sunspot;    oscillation.;   

DOI  :  

学科分类：天文学(综合)

来源: Indian Academy of Sciences

【 摘 要 】

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.

【 授权许可】

Unknown