CDS * Portal * Simbad * VizieR * Aladin * X-Match * Other** <#> o Sesame name resolver o Catalogue collection o TAP VizieR o Dictionary of nomenclature o SimPlay o Bibliography o o Contact us * * Help *J/A+A/581/A11* 72 WINGS nearby clusters luminosity functions (Moretti+, 2015) ------------------------------------------------------------------------ Galaxy luminosity functions in WINGS clusters. Moretti A., Bettoni D., Poggianti B.M., Fasano G., Varela J., D'Onofrio M., Vulcani B., Cava A., Fritz J., Couch W.J., Moles M., Kjaergaard P. =2015A&A...581A..11M (SIMBAD/NED BibCode) ------------------------------------------------------------------------ *ADC_Keywords*: Clusters, galaxy ; Galaxies, photometry *Keywords*: galaxies: clusters: general - galaxies: luminosity function, mass function - galaxies: statistics *Abstract*: Using V band photometry of the WINGS survey, we derive galaxy luminosity functions (LF) in nearby clusters. This sample is complete down to M_V =-15.15, and it is homogeneous, thus facilitating the study of an unbiased sample of clusters with different characteristics. We constructed the photometric LF for 72 out of the original 76 WINGS clusters, excluding only those without a velocity dispersion estimate. For each cluster we obtained the LF for galaxies in a region of radius=0.5xr_200 , and fitted them with single and double Schechter's functions. We also derive the composite LF for the entire sample, and those pertaining to different morphological classes. Finally, we derive the spectroscopic cumulative LF for 2009 galaxies that are cluster members. The double Schechter fit parameters are correlated neither with the cluster velocity dispersion nor with the X-ray luminosity. Our median values of the Schechter's fit slope are, on average, in agreement with measurements of nearby clusters, but are less steep that those derived from large surveys, such as the SDSS. Early-type galaxies out number late-types at all magnitudes, but both early and late types contribute equally to the faint end of the LF. Finally, the spectroscopic LF is in excellent agreement with the one derived for A2199, A85 and Virgo, and with the photometric LF at the bright magnitudes (where both are available). There is a large spread in the LF of different clusters, however, this spread is not caused by correlation of the LF shape with cluster characteristics such as X-ray luminosity or velocity dispersions. The faint end is flatter than previously derived (?_f =-1.7), which is at odds with that predicted from numerical simulations. *Description*: We used the Sextractor photometric catalogue of WINGS galaxies described in Varela et al. (2009A&A...497..667V , Cat. J/A+A/497/667 ), which refers to optical (B,V) photometry of 76 cluster of galaxies, either observed with the INT telescope at La Palma, or with the 2.2m ESO telescope at La Silla. *File Summary*: ------------------------------------------------------------------------ FileName Lrecl Records Explanations ------------------------------------------------------------------------ ReadMe 80 . This file table1.dat <#sRM2.1> 98 72 Schechter function parameters ------------------------------------------------------------------------ *See also*: J/A+A/497/667 : 77 nearby clusters WINGS deep optical phot. (Varela+, 2009) J/MNRAS/281/799 : XBACs, the sample (Ebeling+, 1996) *Byte-by-byte Description of file*: table1.dat <#sRM-F.52> ------------------------------------------------------------------------ Bytes Format Units Label Explanations ------------------------------------------------------------------------ 1- 7 A7 --- Cluster Cluster name 9- 13 F5.3 Mpc+2 Area Area covered by our observations 15- 19 F5.2 --- DGR Dwarf-to-giant ratio 21- 26 F6.2 mag VMAGb Fitted bright part absolute V magnitude (1) <#sRM3.1> 28- 32 F5.2 mag e_VMAGb ?=99.99 relative error on VMAGb 34- 38 F5.2 --- alphab Fitted bright part alpha slope (1) <#sRM3.1> 40- 44 F5.2 --- e_alphab ?=99.99 relative error on alphab 46- 51 F6.2 mag VMAGf Fitted faint part absolute V magnitude (1) <#sRM3.1> 53- 57 F5.2 mag e_VMAGf ?=99.99 relative error on VMAGf 59- 64 F6.2 --- alphaf Fitted faint part alpha slope (1) <#sRM3.1> 66- 70 F5.2 --- e_alphaf ?=99.99 relative error on alphaf 72- 75 F4.2 --- chi2 chi^2 of the fit (per degree of freedom) 77- 80 I4 --- Ngx Number of galaxies 82- 85 I4 km/s sigma Galaxy velocity dispersion 87- 91 F5.2 [10-7W] logLX X-ray luminosity in the range 0.1-4keV from Ebeling et al. (1996MNRAS.281..799E , Cat. J/MNRAS/281/799 ) 93- 98 F6.2 mag VMAGlim Limiting absolute magnitude ------------------------------------------------------------------------ *Note (1)*: Median and Mode values: -------------------------------------------------------------------------- VMAGb alphab VMAGf alphaf -------------------------------------------------------------------------- Galaxies Median -21.15 -0.97 -16.30 -0.60 Galaxies Mode -21.75 -1.10 -15.75 -1.70 Galaxies+Unknown Median -21.45 -1.05 -16.24 -1.13 Galaxies+Unknown Mode -21.25 -1.10 -16.25 -1.10 With ?_b =-1.1 fixed, Galaxies Mode -21.25 --- -16.25 -1.50 With ?_b , Galaxies+Unknown Mode -21.25 --- -16.25 -1.10 -------------------------------------------------------------------------- ------------------------------------------------------------------------ *History*: From electronic version of the journal ------------------------------------------------------------------------ *(End)* Patricia Vannier [CDS] 04-Nov-2015 /The document above follows the rules of the Standard Description for Astronomical Catalogues ; from this documentation it is possible to generate *f77* program to load files into arrays or line by line / ------------------------------------------------------------------------ © Université de Strasbourg/CNRS • Contact