J/MNRAS/297/885ivo://CDS.VizieR/J/MNRAS/297/885doi:10.26093/cds/vizier.72970885CDSGlazebrook K.Abraham R.Santiago B.Ellis R.Griffiths R.2024-06-25T20:18:01Z2005-07-27T10:11:05ZCDS support team

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

cds-question@unistra.frgalaxiesphotometryinfrared-photometryvisible-astronomykron-cousins-photometryThe excess number of blue galaxies at faint magnitudes is a subject of much controversy. Recent Hubble Space Telescope results have revealed a plethora of galaxies with peculiar morphologies tentatively identified as the evolving population. We report the results of optical spectroscopy and near-infrared photometry of a sample of faint HST galaxies from the Medium Deep Survey to ascertain the physical properties of the faint morphological populations. We find four principal results. First, the population of objects classified as 'peculiar' are intrinsically luminous in the optical (M_B_~-19). Secondly these systems tend to be strong sources of [OII] line luminosity. Thirdly the optical-infrared colours of the faint population (a) confirm the presence of a population of compact blue galaxies and (b) show the stellar populations of irregular/peculiar galaxies encompass a wide range in age. Finally a surface-brightness comparison with the local galaxy sample of Freiz et al. (1996AJ....111..174F) shows that these objects are not of anomalously low surface brightness, rather we find that all morphological classes have evolved to a higher surface brightness at higher redshifts (z>0.3).1998MNRAS.297..885Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/297/885CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/107/1 : Morphologies of distant galaxies II (Abraham+ 1996)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/297/885https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/297/885http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/297/885https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/297/885https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/297/885http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/297/885GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/297/885/table2 (K-band UK Infrared Telescope (UKIRT) photometry)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/297/885/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/297/885/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/297/885/table2?GETtext/xml+votable180.050000true105.002833314.15797220.0055555555555555566/8638 8707 9486 10912 13480 17990 19717 22485 23465 23468 23830 31998https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/297/885?format=asciiOpticalInfrareddefaultJ/MNRAS/297/885/table2K-band UK Infrared Telescope (UKIRT) photometryA? Rotational asymmetry (1)floatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[AVG96]Medium Deep Syrvey (MDS) identificationcharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainIcmag? Cousins I magnitudemagfloatnullableKmag? K magnitudemagfloatnullablee_Kmag? rms uncertainty on Kmagmagfloatnullablen_Kmag[n] n: No signalcharC? Central concentration (1)floatnullable