The galaxy luminosity function and the morphological type

1988 ◽  
Vol 332 ◽  
pp. 89 ◽  
Author(s):  
E. Martinez-Gonzalez ◽  
J. L. Sanz
Keyword(s):  
Luminosity Function ◽  
Morphological Type ◽  
The Galaxy ◽  
Galaxy Luminosity Function

scholarly journals Low Luminosity Galaxies in Large Surveys

1999 ◽  
Vol 171 ◽  
pp. 45-51
Author(s):  
John P. Huchra
Keyword(s):  
Surface Brightness ◽  
Luminosity Function ◽  
Morphological Type ◽  
Large Excess ◽  
Redshift Surveys ◽  
Low Surface Brightness ◽  
The Galaxy ◽  
Emission Line Galaxies ◽  
Low Surface Brightness Galaxies ◽  
Galaxy Luminosity Function

AbstractThe debate about the slope and amplitude of the galaxy luminosity function at the faint end is discussed w.r.t. faint galaxies in large surveys, in particular the second CfA (CfA2) and the Las Campanas (LCRS) redshift surveys. Large surveys are necessary to determine the statistics of rare objects or objects that can only be seen out to limited volumes. Both surveys show excesses of faint galaxies over Schechter function fits, but the parent sample for the LCRS survey generally does not contain large or low surface brightness galaxies which do appear in the CfA2 survey. The objects that comprise the relatively large excess of faint galaxies in the CfA2 survey are shown to be primarily of low surface brightness and late morphological type and are generally emission line galaxies. Galaxy samples constructed like the LCRS will generally always be deficient in low luminosity galaxies and thus are not useful for constraining the faint end of the galaxy luminosity function.

The Faint End of the Galaxy Luminosity Function in Abell 426 and 539

1998 ◽  
Vol 116 (3) ◽  
pp. 1118-1124 ◽  
Author(s):  
Roberto De Propris ◽  
Christopher J. Pritchet
Keyword(s):  
Luminosity Function ◽  
The Galaxy ◽  
Galaxy Luminosity Function

scholarly journals The faint end of the galaxy luminosity function in moderate-redshift clusters

1997 ◽  
Vol 284 (4) ◽  
pp. 915-930 ◽  
Author(s):  
G. Wilson ◽  
I. Smail ◽  
R. S. Ellis ◽  
J. C. Warrick
Keyword(s):  
Luminosity Function ◽  
The Galaxy ◽  
Galaxy Luminosity Function

scholarly journals The galaxy luminosity function and its evolution withChandra

2008 ◽  
Vol 480 (3) ◽  
pp. 663-670 ◽  
Author(s):  
P. Tzanavaris ◽  
I. Georgantopoulos
Keyword(s):  
Luminosity Function ◽  
The Galaxy ◽  
Galaxy Luminosity Function

scholarly journals Galaxy Counts

1984 ◽  
Vol 78 ◽  
pp. 489-498
Author(s):  
J.A. Tyson
Keyword(s):  
Luminosity Function ◽  
Automated Detection ◽  
Color Evolution ◽  
Faint Galaxy ◽  
New Information ◽  
The Galaxy ◽  
Color Data ◽  
Photographic Survey ◽  
Galaxy Luminosity Function

AbstractCounts of faint galaxies should reveal any evidence of galaxy luminosity or color evolution, as well as new information on the faint end of the galaxy luminosity function. The FOCAS automated detection and classification software is reviewed, and results of the deep 4m PF photographic survey to 24th magnitude in 23 fields covering 9 sq. degrees are presented. Color-magnitude plots for stars and galaxies are shown, and galaxy color evolution is discussed. Evidence is found for a faint galaxy blue trend at 22-24 J mag. However, the k-correction becomes so severe at redshift ~1 that the intrinsically fainter galaxies are emphasized in any magnitude-limited survey. No unambiguous evidence is found for evolution. New 4m limit CCD multi-color data are shown and discussed. The limiting magnitude for detection is 27th J magnitude in 2 hours integration. The data exclude evolution starting at any one epoch for z<10.

scholarly journals The galaxy–halo connection in modified gravity cosmologies: environment dependence of galaxy luminosity function

2019 ◽  
Vol 488 (1) ◽  
pp. 782-802 ◽  
Author(s):  
N Chandrachani Devi ◽  
Aldo Rodríguez-Puebla ◽  
O Valenzuela ◽  
Vladimir Avila-Reese ◽  
César Hernández-Aguayo ◽  
...  
Keyword(s):  
Modified Gravity ◽  
Luminosity Function ◽  
Cold Dark Matter ◽  
Density Field ◽  
High Density ◽  
Gravity Models ◽  
The Galaxy ◽  
Galaxy Halo ◽  
Environment Dependence ◽  
Galaxy Luminosity Function

Abstract We investigate the dependence of the galaxy–halo connection and galaxy density field in modified gravity models using the N-body simulations for f(R) and nDGP models at z = 0. Because of the screening mechanisms employed by these models, chameleon and Vainshtein, haloes are clustered differently in the non-linear regime of structure formation. We quantify their deviations in the galaxy density field from the standard Λ cold dark matter (ΛCDM) model under different environments. We populate galaxies in haloes via the (sub)halo abundance matching. Our main results are as follows: (1) The galaxy–halo connection strongly depends on the gravity model; a maximum variation of ${\sim }40{{\ \rm per\ cent}}$ is observed between halo occupational distribution (HOD) parameters; (2) f(R) gravity models predict an excess of galaxies in low-density environments of ${\sim }10{{\ \rm per\ cent}}$ but predict a deficit of ${\sim }10{{\ \rm per\ cent}}$ at high-density environments for |fR0| = 10−4 and 10−6 while |fR0| = 10−5 predicts more high-density structures; nDGP models are consistent with ΛCDM; (3) different gravity models predict different dependences of the galaxy luminosity function (GLF) with the environment, especially in void-like regions we find differences around ${\sim }10{{\ \rm per\ cent}}$ for the f(R) models while nDPG models remain closer to ΛCDM for low-luminosity galaxies but there is a deficit of ${\sim }11{{\ \rm per\ cent}}$ for high-luminosity galaxies in all environments. We conclude that the dependence of the GLF with environment might provide a test to distinguish between gravity models and their screening mechanisms from the ΛCDM. We provide HOD parameters for the gravity models analysed in this paper.

scholarly journals Binary Aggregations in Hierarchical Galaxy Formation: The Evolution of the Galaxy Luminosity Function

2002 ◽  
Vol 575 (1) ◽  
pp. 18-32 ◽  
Author(s):  
N. Menci ◽  
A. Cavaliere ◽  
A. Fontana ◽  
E. Giallongo ◽  
F. Poli
Keyword(s):  
Galaxy Formation ◽  
Luminosity Function ◽  
The Galaxy ◽  
Galaxy Luminosity Function
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