Results 111 to 120 of about 540 (140)
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The K-Band Luminosity Function of Galaxies

Symposium - International Astronomical Union, 1997
The luminosity function of galaxies is central to many problems in cosmology, including the interpretation of faint number counts. The near-infrared provides several advantages over the optical for statistical studies of galaxies, including smooth and well-understood K-corrections and expected luminosity evolution. The K–band is dominated by near-solar
J. P. Gardner   +3 more
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The luminosity function for galaxies and the clustering of galaxies

1975
An analytic representation for the luminosity function for galaxies is proposed. Best fits of this function to counts of nearby bright galaxies and to counts of galaxies in rich clusters have been obtained. The results are marginally consistent with a single luminosity function valid for both samples.
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Multi-Wavelength Luminosity Functions of Galaxies

AIP Conference Proceedings, 2003
Multivariate or multi‐wavelength luminosity functions will reveal the interplay between star formation, chemical evolution, and absorption and re‐emission of dust within evolving galaxy populations. By using principal component analysis to reduce the dimensionality of the problem, I optimally extract the relevant photometric information from large ...
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Luminosity function of Seyfert galaxies

Astrophysics, 1986
A sample of 219 Seyfert galaxies (Sy G) in the interval of absolute magnitudes -18.5 greater than or equal to M/rho/ greater than or equal to -24.5 is used to construct the luminosity function and determine the total spatial density (about 2.10/sup -4/ Mpc/sup -3/) of the Seyfert galaxies. It is shown that the Seyfert galaxies in Markaryan's survey are
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The Cluster Galaxy Luminosity Function

Astrophysics and Space Science, 1999
Our project to assess the LF of galaxies in clusters is giving the first results. A universal LF shape cannot be supported and the evolution has to be taken into account to explain differences. The blue galaxy distribution is also investigated.
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The luminosity function of clusters of galaxies

Astrophysics and Space Science, 1978
Observations by Dressler are used to derive integral luminosity functions for ten rich clusters. All luminosity functions are found to consist of a linear portion and a high-luminosity toe. The size of this toe does not appear to correlate with cluster BM type.
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Galaxy Correlations as a Function of Luminosity

1989
It is difficult to determine the variation of galaxy clustering as a function of luminosity from normal 3-D redshift surveys because such surveys of galaxy distances contain few intrinsically faint objects (the majority of galaxies in a magnitude limited sample being bright “M* galaxies”).
S. Phillipps, T. Shanks
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Luminosity function for galaxies and cosmology

Astrophysics and Space Science, 1984
Formulae for two classical cosmological tests,N(z) andN(m) are obtained with the luminosity function taken into account. From the testN(m) and Jarvis and Tyson observational data, characteristic absolute magnitude of galaxiesM *=−20.05 and mean extragalactic absorptionA=4×10−4 mag Mpc−1 have been found.
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The Radio Luminosity Function of Galaxies

1976
In this lecture I wish briefly to outline the main methods used to determine the radio luminosity function. I will then comment on how the form of the luminosity function has important effects on the properties of a sample of radio galaxies identified in a radio catalogue.
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The ALMA REBELS Survey: the first infrared luminosity function measurement at z  ∼ 7

Monthly Notices of the Royal Astronomical Society, 2023
Pascal Oesch   +2 more
exaly  

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