The characteristic polarized radio continuum distribution of cluster spiral galaxies

Details The characteristic polarized radio continuum distribution of cluster spiral galaxies The characteristic polarized radio continuum distribution of cluster spiral galaxies

2007-01-22

arxiv.org/abs/astro-ph/0701610v1

Astronomy and Astrophysics

Astrophysics

5 pages, 1 figure, A&A accepted as a letter

Scientific paper

10.1051/0004-6361:20066980

Deep observations of 6cm polarized radio continuum emission of 8 Virgo spiral galaxies are presented. All galaxies show strongly asymmetric distributions of polarized intensity with elongated ridges located in the outer galactic disk. Such features are not found in existing observations of polarized radio continuum emission of field spiral galaxies, where the distribution of 6cm polarized intensity is generally relatively symmetric and strongest in the interarm regions. We therefore conclude that most Virgo spiral galaxies and most probably the majority of cluster spiral galaxies show asymmetric distributions of polarized radio continuum emission due to their interaction with the cluster environment. The polarized continuum emission is sensitive to compression and shear motions in the plane of the sky and thus contains important information about velocity distortions caused by these interactions.

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