THERMAL CONDENSATIONS IN LARGE STELLAR CORONAL LOOPS

Citation
Jm. Ferreira et Ca. Mendozabriceno, THERMAL CONDENSATIONS IN LARGE STELLAR CORONAL LOOPS, Astronomy and astrophysics, 327(1), 1997, pp. 252-264
Citations number
38
Categorie Soggetti
Astronomy & Astrophysics
Journal title
ISSN journal
00046361
Volume
327
Issue
1
Year of publication
1997
Pages
252 - 264
Database
ISI
SICI code
0004-6361(1997)327:1<252:TCILSC>2.0.ZU;2-6
Abstract
The equations ruling the thermal equilibrium along coronal loops on ra pidly rotating solar-type stars are solved. The particular case of loo ps with lengths comparable or greater than a stellar radius is studied . Depending on the base pressure, it is found that hot loops can exist either with very high coronal temperature (T similar to 10(7) K) or w ith a more solar like temperature (T similar to 10(6) K) Another type of solution consist of loops with a local temperature minimum at the s ummit which can be thought as representing a stellar sling-shot promin ence. A detailed study is presented and it is shown that these solutio ns are available in very general circumstances and without any special requirements such as those concerning the heating distribution along the loop or variations of the cross-sectional area. The equilibrium st ructure of asymmetric loops is analysed. The maximum temperature of ho t loops moves towards the loop leg with more heating, but surprisingly , depending on the parameters of the problem, the prominence solution can appear in either loop leg.