Ultraviolet Spectroscopy of Coronal Mass Ejection

Details Ultraviolet Spectroscopy of Coronal Mass Ejection Ultraviolet Spectroscopy of Coronal Mass Ejection

May 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997spd....28.0121c&link_type=abstract

American Astronomical Society, SPD meeting #28, #01.21; Bulletin of the American Astronomical Society, Vol. 29, p.883

Other

Scientific paper

The Ultraviolet Coronagraph Spectrometer (UVCS) observed a spectacular coronal mass ejection (CME) on December 23 1996, caused by a prominence eruption. The evolution of the ejected plasma was followed for about 2h in both ultraviolet and visible light channels. The observation consists of a series of 5 minutes exposures, at heliocentric distance of 1.5 R_sun. Excursions of more than two orders of magnitude are detected in the Lyalpha (1216 Angstroms/), Lybeta (1026 Angstroms/), Lygamma (972 Angstroms/) and Lydelta (949 Angstroms/) lines of hydrogen. The C III (977 A) is very bright during the CME evolution, but many other more weak low temperature lines, like N III (991 Angstroms/, 991 Angstroms/), N II (1085 Angstroms/), N V (1242 Angstroms/), have been detected. Line intensities and profiles have been measured providing important diagnostics for a very detailed study of physical and dynamical parameters of CME. Lines widths show non-thermal line broadening due to an expansion of plasma with velocity larger than 50 km/sec. The Lyalpha spatial pattern of the line shift appears very structured with red and blue shifts, along the line of sight, up to 0.2 Angstroms/ ( 50km/sec) and 1 Angstroms ( 200 km/sec) respectively. The data also provide the emission measure in the LogT range 4.0 - 5.5. A variation of one order of magnitude has been observed in the polarized brightness.

Affiliated with

Also associated with

No associations

Rating

Ultraviolet Spectroscopy of Coronal Mass Ejection does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Ultraviolet Spectroscopy of Coronal Mass Ejection, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ultraviolet Spectroscopy of Coronal Mass Ejection will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1146502