Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007apj...671..978g&link_type=abstract
The Astrophysical Journal, Volume 671, Issue 1, pp. 978-989.
Astronomy and Astrophysics
Astronomy
10
Magnetohydrodynamics: Mhd, Plasmas, Sun: Abundances, Sun: Filaments, Sun: Prominences
Scientific paper
We investigate the temporal and spatial variation of the relative abundance of He to H in a sample of solar filaments by comparing cotemporal observations of Hα and He I λ10830 obtained at MLSO. Motivated by indications that cross-field diffusion of neutral filament material is an important mechanism in mass loss, the present study offers results that provide a convincing test of the mechanisms proposed in Gilbert and coworkers. Specifically, when observed across an entire disk passage, we find a majority of stable, quiescent filaments show a relative helium deficit in the upper portions of their structure coupled with a relative helium surplus in the lower regions, a consequence of the large loss timescale for neutral helium compared to neutral hydrogen. Moreover, we find that the variation of the relative He/H ratio is uniform across filament barbs and footpoints on both short and long timescales.
Alexander David
Gilbert Holly
Kilper Gary
No associations
LandOfFree
Observational Evidence Supporting Cross-field Diffusion of Neutral Material in Solar Filaments 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 Observational Evidence Supporting Cross-field Diffusion of Neutral Material in Solar Filaments, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Observational Evidence Supporting Cross-field Diffusion of Neutral Material in Solar Filaments will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1527421