The influence of the cluster environment on the large-scale radio continuum emission of 8 Virgo cluster spirals - Astrophysics > Cosmology and Nongalactic AstrophysicsReport as inadecuate




The influence of the cluster environment on the large-scale radio continuum emission of 8 Virgo cluster spirals - Astrophysics > Cosmology and Nongalactic Astrophysics - Download this document for free, or read online. Document in PDF available to download.

Abstract: The influence of the environment on the polarized and total power radiocontinuum emission of cluster spiral galaxies is investigated. We present deepscaled array VLA 20 and 6 cm observations including polarization of 8 Virgospiral galaxies. These data are combined with existing optical, HI, and Halphadata. Ram pressure compression leads to sharp edges of the total powerdistribution at one side of the galactic disk. These edges coincide with HIedges. In edge-on galaxies the extraplanar radio emission can extend furtherthan the HI emission. In the same galaxies asymmetric gradients in the degreeof polarization give additional information on the ram pressure wind direction.The local total power emission is not sensitive to the effects of ram pressure.The radio continuum spectrum might flatten in the compressed region only forvery strong ram pressure. This implies that neither the local star formationrate nor the turbulent small-scale magnetic field are significantly affected byram pressure. Ram pressure compression occurs mainly on large scales >=1 kpcand is primarily detectable in polarized radio continuum emission.



Author: B. Vollmer 1, M. Soida 2, A. Chung 3, R. Beck 4, M. Urbanik 2, K.T. Chyzy 2, K. Otmianowska-Mazur 2, J.H. van Gorkom 5 1 CDS, Obs

Source: https://arxiv.org/







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