Astronomy and Astrophysics – Astrophysics
Scientific paper
May 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sh41b10k&link_type=abstract
American Geophysical Union, Spring Meeting 2001, abstract #SH41B-10
Astronomy and Astrophysics
Astrophysics
7500 Solar Physics, Astrophysics, And Astronomy, 7509 Corona, 7549 Ultraviolet Emissions
Scientific paper
We present a study of velocities and trajectories of blobs visible in UV emission in SOHO/CDS and TRACE prominence movies. It has long been known that prominences are highly dynamic structures exhibiting flowing material. In particular, recent observations in H-alpha indicate that material is counter-streaming at velocities of 5-10 km/s along the prominence spine and in the barbs.* These observations are highly relevant to fundamental questions concerning the source of prominence plasma. Many models of prominence flows involve heating of chromospheric material. By investigating the properties of moving prominence plasma in the 20,000 to 200,000 K range we will be able to provide parameters for comparison with such models. The CDS data were taken in He I (584.33 A) and O V (629.7 A) with the wide (90 arcsec) slit which allows 30 sec cadence movies to be taken simultaneously in a few well isolated lines. We also consider separate TRACE prominence data with Lyman-alpha (1216 A) and C IV (1600 A) observations. Preliminary results indicate motions in the 20-70 km/s range, with most of the observed motion horizontal to the solar surface. Support for this work is provided by NASA SR&T Grant NASW-00034 *Zirker et al., 1998, Nature, 396, 40
de Pontieu Bart
Kucera Therese A.
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