Ngc 4654: Polarized Radio Continuum Emission as a Diagnostic Tool for a Galaxy–cluster Interaction Models versus Observations
نویسنده
چکیده
A recent comparison between deep VLA Hi observations and dynamical models of the Virgo cluster spiral galaxy NGC 4654 has shown that only a model involving a combination of a tidal interaction and ram pressure can reproduce the data.
منابع مشابه
ar X iv : a st ro - p h / 04 03 05 4 v 1 2 M ar 2 00 4 Radio continuum observations of the Virgo cluster spiral NGC 4522
Radio continuum observations at 20 and 6 cm of the highly inclined Virgo spiral galaxy NGC 4522 are presented. Both, 20 and 6 cm total emission distributions are asymmetric with an extended component to the west where extraplanar atomic gas and Hα emission are found. The 6 cm polarized emission is located at the eastern edge of the galactic disk. Its peak is located about 1 kpc to the east of t...
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Context. Evolution of spiral galaxies in the Virgo cluster. Aims. We determined the parameters of the interaction between the interstellar medium of NGC 4522 and the intracluster medium of the Virgo cluster. Methods. A dynamical model including ram pressure stripping is applied to the strongly Hi deficient Virgo spiral galaxy NGC 4522. A carefully chosen model snapshot is compared with existing...
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We present the results of ATCA H i line and 20-cm radio continuum observations of the galaxy Quartet NGC 6845. The H i emission extends over all four galaxies but can only be associated clearly with the two spiral galaxies, NGC 6845A and B, which show signs of strong tidal interaction. We derive a total H i mass of at least 1.8×10 M⊙, most of which is associated with NGC 6845A, the largest gala...
متن کاملNGC 4654: gravitational interaction or ram pressure stripping?
The Virgo cluster spiral galaxy NGC 4654 is supposed to be a good candidate for ongoing ram pressure stripping based on its very asymmetric Hi distribution. However, this galaxy also shows an asymmetric stellar distribution. Numerical simulations using ram pressure as the only perturbation can produce a tail structure of the gas content, but cannot account for its kinematical structure. It is s...
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تاریخ انتشار 2006