J/A+AS/118/65ivo://CDS.VizieR/J/A+AS/118/65CDSBelloni P.Roeser H.-J.2001-06-22T11:48:03Z2001-06-22T11:47:56ZCDS support team

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

cds-question@unistra.frgalaxy-clustersredshiftedWe present results of a study of the galaxy population of Cl 0939+472 (z=0.41) and Cl 0016+161 (z=0.54). We have used narrow-band filters (FWHM=~90-200A) and broad band B, R, I filters covering the range from 3800A to 9200A obtain low resolution spectra for all galaxies brighter than R=22.5mag in a 5'x5' (Cl 0939+472) and a 3.5'x5' (Cl 0016+161) field. Template spectra for classical Hubble type and E+A galaxies were fitted to the low-resolution spectral energy distribution in order to determine the galaxies' redshift and the morphological type. We detected 160 cluster members in Cl 0939+472 and 100 in Cl 0016+161, with a success rate of about 80% in the determination of redshifts and corresponding classification of morphological types from spectral energy distributions. These results constitute a statistical improvement of at least a factor of 4 over the most complete study to date of these clusters. In particular, we provide a large sample of elliptical galaxies with secure membership, well suited for a study of evolutionary effects. The same E+A templates developed for the analysis of Cl 0939+472 were successful in recognizing almost all of the spectroscopically already known E+A galaxies in Cl 0016+161 and in identifying 10 new ones. Our results show that in this cluster, too, the fraction of E+A galaxies represents about 20% of the total galaxy population. This outlines the importance of taking into account galaxies with signs of recent star formation for a correct evaluation of the Butcher-Oemler effect in distant galaxy clusters.1996A&AS..118...65Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+AS/118/65CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+AS/118/65https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+AS/118/65http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+AS/118/65https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+AS/118/65https://vizier.iucaa.in/viz-bin/votable?-source=J/A+AS/118/65http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+AS/118/65GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+AS/118/65/table5 (Data of 200 objects with R>22.5mag in Cl 0016+161 field)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+AS/118/65/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/A+AS/118/65/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+AS/118/65/table5?GETtext/xml+votable180.050000true4.666244416.38695940.005555555555555556Cone search capability for table J/A+AS/118/65/table4 (Data of 323 objects with R>22.5mag in Cl 0939+47 field)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+AS/118/65/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/A+AS/118/65/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+AS/118/65/table4?GETtext/xml+votable180.050000true145.757037547.01243390.0055555555555555566/5860 19848https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+AS/118/65?format=asciiOpticaldefaultJ/A+AS/118/65/table5Data of 200 objects with R>22.5mag in Cl 0016+161 fieldNoSequence numbermeta.idintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintXposX coordinatearcsecpos.cartesian.x;instr.detfloatYposY coordinatearcsecpos.cartesian.y;instr.detfloatRmagR magnitudemagphot.mag;em.opt.RfloatB-R? B-R colormagphot.color;em.opt.B;em.opt.Rfloatnullablen_B-R[?] Note no B-R (1)meta.notecharB-I? B-I colormagphot.color;em.opt.B;em.opt.Ifloatnullablen_B-I[?] Note no B-I (1)meta.notecharD40004000A-break indexspect.indexfloatzD92? Redshitf from Dressler & Gunn, 1992src.redshiftfloatnullablez? Redshiftsrc.redshiftfloatnullablen_z[?] Note on z, s = star (1)meta.notechare_z? rms uncertainty on zstat.errorfloatnullablen_e_z[?] Note on e_z (1)meta.notecharMTypeMorphological typesrc.morph.typechar_RAComputed Right Ascension for Equinox: J2000degpos.eq.ra;meta.main_DEComputed Declination for Equinox: J2000degpos.eq.dec;meta.mainJ/A+AS/118/65/table4Data of 323 objects with R>22.5mag in Cl 0939+47 fieldNoSequence numbermeta.id;meta.mainintD40004000A-break indexspect.indexfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintXposX coordinatearcsecpos.cartesian.x;instr.detfloatYposY coordinatearcsecpos.cartesian.y;instr.detfloatRmagR magnitudemagphot.mag;em.opt.RfloatB-R? B-R colormagphot.color;em.opt.B;em.opt.Rfloatnullablen_B-R[?] Note no B-R (1)meta.notecharB-I? B-I colormagphot.color;em.opt.B;em.opt.Ifloatnullablen_B-I[?] Note no B-I (1)meta.notecharzD92? Redshitf from Dressler & Gunn, 1992src.redshiftfloatnullablez? Redshiftsrc.redshiftfloatnullablen_z[?] Note on z, s = star (1)meta.notechare_z? rms uncertainty on zstat.errorfloatnullablen_e_z[?] Note on e_z (1)meta.notecharMTypeMorphological typesrc.morph.typechar_RAComputed Right Ascension for Equinox: J2000degpos.eq.ra;meta.main_DEComputed Declination for Equinox: J2000degpos.eq.dec;meta.main