J/AJ/143/102ivo://CDS.VizieR/J/AJ/143/102doi:10.26093/cds/vizier.51430102CDSGeller M.J.Diaferio A.Kurtz M.J.Dell'Antonio I.P.Fabricant D.G.2017-12-05T05:10:19Z2013-06-10T08:31:34ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frgalaxiescatalogsspectroscopyredshiftedsurface-photometrySmithsonian Hectospec Lensing Survey (SHELS) is a dense redshift survey covering a 4deg^2^ region to a limiting R=20.6. In the construction of the galaxy catalog and in the acquisition of spectroscopic targets, we paid careful attention to the survey completeness for lower surface brightness dwarf galaxies. Thus, although the survey covers a small area, it is a robust basis for computation of the slope of the faint end of the galaxy luminosity function to a limiting M_R_=-13.3+5logh. We calculate the faint-end slope in the R band for the subset of SHELS galaxies with redshifts in the range 0.02<=z<0.1, SHELS_0.1_. This sample contains 532 galaxies with R<20.6 and with a median surface brightness within the half-light radius of SB_50,R_=21.82mag/arcsec^2^. We used this sample to make one of the few direct measurements of the dependence of the faint end of the galaxy luminosity function on surface brightness. For the sample as a whole the faint-end slope, {alpha}=-1.31+/-0.04, is consistent with both the Blanton et al. analysis of the Sloan Digital Sky Survey (2005ApJ...631..208B, 2005AJ....129.2562B) and the Liu et al. analysis of the COSMOS field (2008ApJ...672..198L). This consistency is impressive given the very different approaches of these three surveys. A magnitude-limited sample of 135 galaxies with optical spectroscopic redshifts with mean half-light surface brightness, SB_50,R_>=22.5mag/arcsec^2^ is unique to SHELS_0.1_. The faint-end slope is {alpha}_22.5_=-1.52+/-0.16. SHELS_0.1_ shows that lower surface brightness objects dominate the faint-end slope of the luminosity function in the field, underscoring the importance of surface brightness limits in evaluating measurements of the faint-end slope and its evolution.2012AJ....143..102Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/143/102CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/139 : The SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012)J/AJ/139/1857 : Sample of major galaxy pairs at z=0.08-0.38 (Woods+, 2010)J/AJ/127/704 : Low surface brightness galaxies in SDSS (Kniazev+, 2004)J/ApJ/591/764 : R magnitudes for 6 nearby galaxy clusters (Christlein+, 2003)J/ApJS/105/209 : Low surface brightness galaxies. I. The catalog (Impey+ 1996)http://sdss.physics.nyu.edu/vagc : NYU Value-Added Galaxy Catalog home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/143/102https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/143/102http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/143/102https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/143/102https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/143/102http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/143/102GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/143/102/table1 (SHELS_0.1_ redshifts (Smithsonian Hectospec Lensing Survey))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/143/102/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/143/102/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/143/102/table1?GETtext/xml+votable180.050000true138.7082041730.486325280.005555555555555556Cone search capability for table J/AJ/143/102/table2 (*Low-redshift candidate list)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/143/102/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/143/102/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/143/102/table2?GETtext/xml+votable180.050000true138.7089530.984318610.0055555555555555565/1241 6/4941 4942 4943 4954 4973 4976 49782.762881831355591e-19 3.3785437584409506e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/143/102?format=asciiOpticaldefaultJ/AJ/143/102/table1SHELS_0.1_ redshifts (Smithsonian Hectospec Lensing Survey)DEJ2000[28/31] Degree of Declination (J2000)pos.eq.dec;meta.mainRmag[12.5/21] The R band total magnitude (1)magphot.mag;em.opt.RfloatzRedshift (2)src.redshiftdoubleRAJ2000[9] Hour of Right Ascension (J2000)pos.eq.ra;meta.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSHELSSmithsonian Hectospec Lensing Survey (SHELS) identifier (G1)meta.id;meta.maincharobjID? SDSS identifiermeta.idnullabler_RmagSource of Rmag (SDSS or DLS) (1)meta.ref;pos.framecharr_zSource of z (MMT or SDSS) (3)meta.ref;pos.framechare_z[8/150] Redshift uncertaintykm/sstat.error;src.redshiftfloatmuR[18.7/25.6] Observed mean R-band surface brightness (G2)mag.arcsec**-2phot.mag.sb;em.opt.R;stat.meanfloatDR7Display the photometric SDSS-DR7 catalog (Cat. II/294)meta.ref.urlcharSloanDisplay the SDSS online data for this objectmeta.ref.urlcharSimbadNameSimbad column added by the CDSmeta.idcharJ/AJ/143/102/table2*Low-redshift candidate listrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSHELSSmithsonian Hectospec Lensing Survey (SHELS) identifier (G1)meta.id;meta.maincharobjIDSDSS identifiermeta.idRAJ2000[9] Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000[28/31] Degree of Declination (J2000)pos.eq.dec;meta.mainRmag[14.7484/20.5993] The R band magnitudemagphot.mag;em.opt.RfloatmuR[18.7406/25.9514] Mean R band surface brightness (G2)mag.arcsec**-2phot.mag.sb;em.opt.Rfloatg-r[-0.08/1.064] (g-r) color index in the SDSS colormagphot.color;em.opt.B;em.opt.RfloatDR7Display the photometric SDSS-DR7 catalog (Cat. II/294)meta.ref.urlcharSloanDisplay the SDSS online data for this objectmeta.ref.urlcharSimbadNameSimbad column added by the CDSmeta.idchar