Non-LTE radiating acoustic shocks and CA II K2V bright points

Details Non-LTE radiating acoustic shocks and CA II K2V bright points Non-LTE radiating acoustic shocks and CA II K2V bright points

Sep 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...397l..59c&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 397, no. 1, p. L59-L62.

Computer Science

Sound

132

Calcium, Chromosphere, Line Spectra, Shock Wave Propagation, Solar Atmosphere, Sound Waves, Hydrodynamic Equations, Nonequilibrium Thermodynamics, Plasma Heating

Scientific paper

We present, for the first time, a self-consistent solution of the time-dependent 1D equations of non-LTE radiation hydrodynamics in solar chromospheric conditions. The vertical propagation of sinusoidal acoustic waves with periods of 30, 180, and 300 s is calculated. We find that departures from LTE and ionization recombination determine the temperature profiles of the shocks that develop. In LTE almost all the thermal energy goes into ionization, so the temperature rise is very small. In non-LTE, the finite transition rates delay the ionization to behind the shock front. The compression thus goes into thermal energy at the shock front leading to a high temperature amplitude. Further behind the shock front, the delayed ionization removes energy from the thermal pool, which reduces the temperature, producing a temperature spike. The 180 s waves reproduce the observed temporal changes in the calcium K line profiles quite well. The observed wing brightening pattern, the violet/red peak asymmetry and the observed line center behavior are all well reproduced. The short-period waves and the 5 minute period waves fail especially in reproducing the observed behavior of the wings.

Affiliated with

Also associated with

No associations

Rating

Non-LTE radiating acoustic shocks and CA II K2V bright points 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 Non-LTE radiating acoustic shocks and CA II K2V bright points, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-LTE radiating acoustic shocks and CA II K2V bright points will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1766304