Astronomy and Astrophysics – Astronomy
Scientific paper
May 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996mnras.280..438j&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 280, Issue 2, pp. 438-446.
Astronomy and Astrophysics
Astronomy
14
Magnetic Fields, Mhd, Galaxies: Clusters: General, Cooling Flows, Intergalactic Medium, X-Rays: Galaxies
Scientific paper
Optical emission-line filaments have been observed associated with cooling flows in clusters of galaxies. It is still not known, however, what mechanism(s) are powering the optical emission of the filaments. In this work we study the effects of magnetic reconnection (MR) as an excitation mechanism of filaments in cooling flows. Here we discuss in some detail the MR process in the collisionless plasma of the intracluster medium (ICM) and estimate its efficiency. We use hydrodynamical time-dependent calculations to follow the evolution of cooling condensations until the phase of optical line emission. We analyse the cases in which the magnetic field is passive (i.e. it acts only as magnetic pressure) and those in which the reconnection process contributes as a heating source. Our results indicate that MR can be an important contributor to [OI] lambda6300 emission in some filament systems.
Friaca Amanacio C. S.
Jafelice Luiz C.
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