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Galaxies in the Galactic Plane

  • R. C. Kraan-Korteweg
Part of the Reviews in Modern Astronomy book series (MOD.ASTRONOMY, volume 2)

Abstract

The anisotropy of the microwave background radiation (MWB) is assumed to be caused by a local motion that is presumably induced by the irregular mass distribution of galaxies in our closer or wider neighbourhood. Assuming that the mass to light ratio is constant, the overall extra-galactic light distribution should reveal the direction of any excess gravitational force on the Local Group. A galaxy search to faint magnitudes was started in the southern galactic plane (|b|≤10*) to gain a more complete picture of the galaxy distribution close to the hardly explored dust equator of the Milky Way. So far, 151/2 fields of the ESO/SERC survey near Hydra (i.e. the vicinity of the dipole) were searched. The distribution of more than 2200 detected galaxies with D≥0.2 arcmin suggests an extension of the Hydra and Antlia clusters across the galactic plane. If this large structure of over 35* on the celestial sphere can be confirmed it will contribute significantly to the peculiar velocity of the Local Group and hence in explaining the observed MWB dipole.

Keywords

Local Group Galactic Plane Peculiar Velocity Nearby Galaxy Early Type Galaxy 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1989

Authors and Affiliations

  • R. C. Kraan-Korteweg
    • 1
  1. 1.Astronomisches InstitutUniversität BaselBinningenSwitzerland

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