Cooling of solar flares plasmas. 1: Theoretical considerations

Details Cooling of solar flares plasmas. 1: Theoretical considerations Cooling of solar flares plasmas. 1: Theoretical considerations

Feb 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...439.1034c&link_type=abstract

The Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 439, no. 2, p. 1034-1043

Computer Science

Numerical Analysis

85

Cooling, Coronal Loops, Magnetohydrodynamics, Numerical Analysis, Plasmas (Physics), Solar Flares, Conductive Heat Transfer, Mathematical Models, Radiative Heat Transfer, Scaling Laws, Temperature Distribution

Scientific paper

Theoretical models of the cooling of flare plasma are reexamined. By assuming that the cooling occurs in two separate phase where conduction and radiation, respectively, dominate, a simple analytic formula for the cooling time of a flare plasma is derived. Unlike earlier order-of-magnitude scalings, this result accounts for the effect of the evolution of the loop plasma parameters on the cooling time. When the conductive cooling leads to an 'evaporation' of chromospheric material, the cooling time scales L5/6/p1/6, where the coronal phase (defined as the time maximum temperature). When the conductive cooling is static, the cooling time scales as L3/4n1/4. In deriving these results, use was made of an important scaling law (T proportional to n2) during the radiative cooling phase that was forst noted in one-dimensional hydrodynamic numerical simulations (Serio et al. 1991; Jakimiec et al. 1992). Our own simulations show that this result is restricted to approximately the radiative loss function of Rosner, Tucker, & Vaiana (1978). for different radiative loss functions, other scaling result, with T and n scaling almost linearly when the radiative loss falls off as T-2. It is shown that these scaling laws are part of a class of analytic solutions developed by Antiocos (1980).

Affiliated with

Also associated with

No associations

Rating

Cooling of solar flares plasmas. 1: Theoretical considerations 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 Cooling of solar flares plasmas. 1: Theoretical considerations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cooling of solar flares plasmas. 1: Theoretical considerations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1630719