Hydrodynamic simulations of coronal loops subject to transient heating

Details Hydrodynamic simulations of coronal loops subject to transient heating Hydrodynamic simulations of coronal loops subject to transient heating

Jun 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.508..331s&link_type=abstract

In: Proceedings of the SOHO 11 Symposium on From Solar Min to Max: Half a Solar Cycle with SOHO, 11-15 March 2002, Davos, Switze

Physics

3

Solar Corona, Transition Region, Coronal Heating

Scientific paper

We investigate the hydrodynamic behaviour of coronal loops undergoing transient heating. We adopt a 1-D loop model with space- and time-dependent heating, concentrated near the chromospheric footpoints. The timescale of heating variations is comparable with the radiative cooling time of the coronal plasma (~103s). We use a new numerical code that has a fully adaptive grid, in order to properly resolve the chromospheric-coronal transition region sections of the loop. We simulate here the hydrodynamics of a loop with different effective gravity (i.e., loop geometry) and heating terms. We describe the temporal behaviour of the various physical quantities along the loop (plasma density,temperature, flow velocity), showing that the increase in heating produces a chromospheric evaporation, or a siphon flow if the loop heating is taken to be significantly different at the two footpoints, followed by long-lasting downflows with velocities of a few km s-1 during the quiescent phases in between the episodic heatings. Moreover, in the case of considerable increase in heating, a thermal instability can occur during the cooling phase of the loop plasma, giving rise to downflows of several tens of km s-1.

Affiliated with

Also associated with

No associations

Rating

Hydrodynamic simulations of coronal loops subject to transient heating 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 Hydrodynamic simulations of coronal loops subject to transient heating, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydrodynamic simulations of coronal loops subject to transient heating will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1210856