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  • 1
    Electronic Resource
    Electronic Resource
    A class of compact dwarf galaxies from disruptive processes in galaxy clusters (2003)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 423 (2003), S. 519-521 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Dwarf galaxies have attracted increased attention in recent years, because of their susceptibility to galaxy transformation processes within rich galaxy clusters. Direct evidence for these processes, however, has been difficult to obtain, with a small number of diffuse light trails and ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nature01666
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    A smooth ride for galaxies (1991)
    [s.l.] : Nature Publishing Group
    Nature 350 (1991), S. 464-464 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SEARCHES for large-scale distributions of matter in the Universe are all the rage now-adays, as Dressier indicated in a review ar-ticle in last week's issue1. But the picture of how these distributions are gravitationally pulling our Galaxy and its neighbours around our corner of the Universe seems ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/350464a0
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Interacting elliptical galaxies as hosts of intermediate-redshift quasars (1995)
    [s.l.] : Nature Publishing Group
    Nature 376 (1995), S. 150-153 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] QUASARS are the most luminous objects in the Universe. It has been speculated that they are the visible evidence for accretion of gas onto supermassive black holes that reside at the centres of host galaxies. Direct observational confirmation that quasars reside in the centres of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/376150a0
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Galactic γ and radio synchrotron radiation (1981)
    [s.l.] : Nature Publishing Group
    Nature 289 (1981), S. 470-473 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] y rays with energies in the region of interest (-100 MeV) are produced by bremsstrahlung of cosmic-ray electrons of a few 100 MeV on the interstellar gas and from the decay of neutral pions, produced in the interactions with the gas of cosmic-ray nuclei with energies of a few GeV. (The inverse ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/289470a0
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  • 5
    Electronic Resource
    Electronic Resource
    On the optical observation of galaxies with large redshifts (1977)
    [s.l.] : Nature Publishing Group
    Nature 265 (1977), S. 313-314 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The problem of whether distant galaxies fall within the limiting apparent magnitude of a plate can be examined from the published energy distributions. Figure 1 shows the absolute energy distribution adopted for an Sb/Sc galaxy. Below 2740 Å the fluxes represent the average of the six ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/265313a0
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  • 6
    Electronic Resource
    Electronic Resource
    Surface brightness bias in galaxy catalogues; distance effects (1993)
    Springer
    Astrophysics and space science 207 (1993), S. 91-104 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We have investigated the apparent variation of the surface brightness distribution of disc galaxies with distance within three different samples 1) a diameter limited sample of ESO catalogue galaxies in the direction of the cluster A3574 in Centaurus, 2) all ESO catalogue disc galaxies with redshifts, and 3) a sample of fainter galaxies from our surveys of the Fornax Cluster area. In each case we find, as predicted for a sample dominated by surface brightness selection effects, that the distribution narrows with distance. Both high and low surface brightness galaxies are underrepresented in galaxy catalogues. Not because they are rare, but because the volume over which they are sampled is considerably smaller than that of their normal surface brightness counterparts. The question of how many galaxies there are in the Universe remains un-answered. In addition, since selection is byapparent surface brightness, the most distant sample (where cosmological dimming becomes important) contains galaxies of higher intrinsic surface brightness than do the nearby samples, again confirming a previous theoretical prediction. The galaxies we observe in the distant Universe are very different to those we observe close by because of observational selection.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00659132
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  • 7
    Electronic Resource
    Electronic Resource
    The surface brightness of IRAS galaxies (1989)
    Springer
    Astrophysics and space science 157 (1989), S. 299-303 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Using IRAS measurements, we find positive correlations between both the infrared to optical flux ratio (L FIR/L B) and infrared colour temperature (L 60/L 100) with optical surface brightness. These correlations can be understood by high surface brightness galaxies having (i) a high star formation rate, or (ii) a high-space density of stars and dust. In an attempt to interpret (ii) above, we have produced radiative transfer models for the dust absorption in a galactic disc. These models indicate that the highest surface brightness galaxies may be the most dust obscured (i.e., optically thick) and that the total luminosity (and, hence, mass) of these galaxies may be considerably underestimated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00637344
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