Neutral hydrogen distributions and probable magnetic field distributions in nearby spiral galaxies

1993 ◽  
Vol 206 (2) ◽  
pp. 275-284 ◽  
Author(s):  
J. P. Vall�e
Keyword(s):  
Magnetic Field ◽  
Spiral Galaxies ◽  
Neutral Hydrogen ◽  
Field Distributions

scholarly journals Influence of Gravitational Lensing on Estimates of Ω in Neutral Hydrogen

1996 ◽  
Vol 173 ◽  
pp. 97-98
Author(s):  
Matthias Bartelmann ◽  
Abraham Loeb
Keyword(s):  
Observational Data ◽  
Gravitational Lensing ◽  
Column Density ◽  
Spiral Galaxies ◽  
Neutral Hydrogen ◽  
Absorption Lines ◽  
Gravitational Lenses ◽  
High Column

A wealth of observational data supports the commonly held view that damped Lyman-α (Lyα) absorption in QSO spectra is associated with neutral-hydrogen (HI) disks in spiral galaxies. Most of the HI probed by QSO absorption lines is traced by damped Lyα lines because of their high column densities, N > 1020 cm–2. The spiral galaxies hosting the HI disks can act as gravitational lenses on the QSOs. If the HI column density increases towards the center of the disks, as suggested by observations of local galaxies, the magnification bias preferentially selects for high column-density systems. The estimates of HI in damped Lyα systems can then systematically be distorted by gravitational lensing.

Magnetic field distributions and energy losses resulting from metal tape motion

1967 ◽  
Vol 3 (3) ◽  
pp. 546-551
Author(s):  
S. Ohteru ◽  
H. Kobayashi ◽  
I. Nashiyama
Keyword(s):  
Magnetic Field ◽  
Energy Losses ◽  
Field Distributions ◽  
Metal Tape

scholarly journals Interstellar Matters: Neutral Hydrogen and the Galactic Magnetic Field

2018 ◽  
Vol 867 (2) ◽  
pp. 139 ◽  
Author(s):  
G. L. Verschuur ◽  
J. T. Schmelz ◽  
M. Asgari-Targhi
Keyword(s):  
Magnetic Field ◽  
Neutral Hydrogen ◽  
Galactic Magnetic Field

scholarly journals Dynamo in Astrophysics

1990 ◽  
Vol 140 ◽  
pp. 83-89
Author(s):  
A.A. Ruzmaikin
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Turbulent Flow ◽  
Large Scale ◽  
Spiral Galaxies ◽  
Clusters Of Galaxies ◽  
Magnetic Structures ◽  
Random Magnetic Field ◽  
Astrophysical Objects

The fast dynamo acting in a turbulent flow explains the origin of magnetic fields in astrophysical objects. Stellar cycles and large-scale magnetic fields in spiral galaxies reflect the behaviour of a mean magnetic field. Intermittent magnetic structures in clusters of galaxies are associated with random magnetic field.

Magnetic Fields and Star Formation for the ANS Sample of Galaxies

1990 ◽  
Vol 140 ◽  
pp. 233-234
Author(s):  
J. Stryczynski
Keyword(s):  
Magnetic Field ◽  
Star Formation ◽  
Magnetic Fields ◽  
Field Strength ◽  
Magnetic Field Strength ◽  
Field Data ◽  
Spiral Galaxies ◽  
Magnetic Field Data ◽  
Uv Range

From the literature we collected radio and magnetic field data for the ANS spiral galaxies. We suggest that the groups of objects, as revealed in the UV range, do not differ in magnetic field strength, although statistics of the sample are very poor.

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