Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006a%26a...445..915k&link_type=abstract
Astronomy and Astrophysics, Volume 445, Issue 3, January III 2006, pp.915-929
Astronomy and Astrophysics
Astrophysics
13
Galaxies: Ism, Galaxies: Magnetic Fields, Methods: Numerical, Methods: Data Analysis
Scientific paper
We report a three-dimensional (3D) numerical model of the Parker instability with cosmic rays and shear in a galactic disk and compute the components of the dynamo coefficients α and β from the electromotive forces obtained from simulations. For the first time we apply well-known statistical procedures to fit the modeled electromotive forces in terms of the dynamo tensors. We compare our results with kinematic and other methods of dynamo coefficient estimation. Although we do not solve all problems with the physical interpretation of the dynamo tensors we find that the presented methods give us the ability to compute them with the desired statistical quality. The obtained values of αxx (along the radial direction in galaxy) and αzz are of the order of a few km s-1 while the value of αyy (along the azimuthal direction) is one or two orders of magnitude smaller.
Hanasz Michal
Kowal Grzegorz
Otmianowska-Mazur Katarzyna
No associations
LandOfFree
Dynamo coefficients in Parker unstable disks with cosmic rays and shear. The new methods of estimation 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 Dynamo coefficients in Parker unstable disks with cosmic rays and shear. The new methods of estimation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dynamo coefficients in Parker unstable disks with cosmic rays and shear. The new methods of estimation will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1278425