Turbulence and magnetic fields in elliptical galaxies.

Details Turbulence and magnetic fields in elliptical galaxies. Turbulence and magnetic fields in elliptical galaxies.

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996mnras.279..229m&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Vol. Vol. 279, No. 1, p. 229 - 239

Astronomy and Astrophysics

Astronomy

22

Magnetic Fields -- Mhd -- Ism: Magnetic Fields -- Galaxies: Haloes -- Galaxies: Magnetic Fields, Elliptical Galaxies: Magnetic Fields, Elliptical Galaxies: Turbulence

Scientific paper

The authors discuss the physical nature of turbulence and interstellar magnetic fields in the X-ray haloes of elliptical galaxies. The turbulent velocity field is represented by two components, acoustic turbulence driven by Type I supernovae and vortical turbulence whose energy source is the stellar motion with respect to the interstellar gas. The typical velocity of the sound-wave turbulence is 60 km s-1 and the scale is 350 pc. For the vortical turbulence, these are 3 km s-1 and 3 pc, respectively; the latter velocity field is expected to be rather inhomogeneous. The turbulent motions drive a dynamo generating, within a galactocentric distance of 10 kpc, random magnetic fields whose strength is about 14 μG at the centre and decreases to 1 μG at radius 10 kpc; the correlation scale is the same as that of the acoustic turbulence, i.e. a few hundred parsecs. The magnetic fields produce spatial fluctuations in the Faraday rotation measure whose amplitude is 30 and 300 rad m-2, for observations with linear resolution 1 kpc and 0.1 kpc, respectively.

Affiliated with

Also associated with

No associations

Rating

Turbulence and magnetic fields in elliptical galaxies. 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 Turbulence and magnetic fields in elliptical galaxies., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Turbulence and magnetic fields in elliptical galaxies. will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1615736