J/MNRAS/338/508ivo://CDS.VizieR/J/MNRAS/338/508doi:10.26093/cds/vizier.73380508CDSPerez-Gonzalez P.G.Gil de Paz A.Zamorano J.Gallego J.,Alonso-Herrero A.Aragon-Salamanca A.2024-06-28T20:17:01Z2003-02-19T13:06:30ZCDS support team

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

cds-question@unistra.frgalaxiesinfrared-sourcesphotometryspectroscopyWe present an analysis of the integrated properties of the stellar populations in the Universidad Complutense de Madrid (UCM) Survey of H{alpha}-selected galaxies. In this paper, the first of a series, we describe in detail the techniques developed to model star-forming galaxies using a mixture of stellar populations, and taking into account the observational uncertainties. We assume a recent burst of star formation superimposed on a more evolved population. The effects of the nebular continuum, line emission and dust attenuation are taken into account. We also test different model assumptions, including the choice of specific evolutionary synthesis model, initial mass function, star formation scenario and the treatment of dust extinction. Quantitative tests are applied to determine how well these models fit our multiwavelength observations for the UCM sample. Our observations span the optical and near-infrared, including both photometric and spectroscopic data. Our results indicate that extinction plays a key role in this kind of study, revealing that low- and high-obscured objects may require very different extinction laws and must be treated differently. We also demonstrate that the UCM Survey galaxies are best described by a short burst of star formation occurring within a quiescent galaxy, rather than by continuous star formation. A detailed discussion on the inferred parameters, such as the age, burst strength, metallicity, star formation rate, extinction and total stellar mass for individual objects, is presented in Paper II of this series.2003MNRAS.338..508Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/338/508CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/95/387 : Universidad Complutense de Madrid list 1 (Zamorano+ 1994)J/ApJS/105/343 : Universidad Complutense de Madrid list 2 (Zamorano+ 1996)J/ApJS/122/415 : Universidad Complutense de Madrid list 3 (Alonso+, 1999)J/A+AS/120/323 : Long-slit spectroscopy of UCM galaxies (Gallego+ 1996)J/A+A/365/370 : Photometry of UCM galaxies. II. (Perez-Gonzalez+, 2001)J/MNRAS/338/525 : Recent star formation in UCM gal. II. (Perez-Gonzalez+, 2003)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/338/508https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/338/508http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/338/508https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/338/508https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/338/508http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/338/508GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/338/508/table2 (Photometric and spectroscopic parameters for 191 galaxies in the UCM Survey)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/338/508/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/338/508/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/338/508/table2?GETtext/xml+votable180.050000true0.79087521.9596940.0055555555555555565/2595 6/670 689 691 698 702 738-739 745 2051 2056 2058 2064 2066 2071 8470 8615 8617 8679 9003 9006 9019 9091 9093 9096 9098-9099 9102 9106-9107 9124-9125 9286-9287 9289 9294 9298 9305 9310 9317 10296 10298 10301 10378-10379 10386 10388 10393-10395 10400-10401 10404-10405 10408 10413 10416 13331 13376 17975 17980 18016 18024-18025 18027 18029 18069 18114-18115 18121 18124 18126 19851 19866 19874 19876-19877 19879 19883 19889 19897 19899-19900 19908-19910 19914-19915 19917-19918 19923 19928-19929 20026 20030-20031 20074 20089-20090 20094-20095 20100 20103 20118-20119 20121 20123-20124 20127 20140 20150 20153 20159 20161 20165 20167 20172 20176-20178 20182-20185 20187-20188 20201 20208 20230-20231 20242 20260 20262 28148 28150 31714https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/338/508?format=asciiOpticalInfrareddefaultJ/MNRAS/338/508/table2Photometric and spectroscopic parameters for 191 galaxies in the UCM SurveyzRedshiftsrc.redshiftfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintUCMUCM galaxy namemeta.id;meta.maincharBmagJohnson B magnitude (1)magphot.mag;em.opt.Bfloate_Bmagrms uncertainty on Bmagmagstat.errorfloatrmag? Gunn r magnitude (1)magphot.mag;em.opt.Rfloatnullablee_rmag? rms uncertainty on rmagmagstat.errorfloatnullableJmag? J magnitude (1)magphot.mag;em.IR.Jfloatnullablee_Jmag? rms uncertainty on Jmagmagstat.errorfloatnullableKsmag? Ks magnitude (1)magphot.mag;em.IR.Kfloatnullablee_Ksmag? rms uncertainty on Ksmagmagstat.errorfloatnullableEWH{alpha} equivalent width (emission)0.1nmspect.line.eqWidthfloate_EWrms uncertainty on EW0.1nmstat.errorfloat3dL3 times the disk scale (2)kpcsrc.morph.scLengthfloatHa/HbIntensity ratio H{alpha} to H{beta} (3)phot.flux;arith.ratiofloatextGalactic extinction in B (4)magphys.absorptionfloatMTypeMorphological type (5)src.morph.typecharSpTypeSpectroscopic type (6)src.spTypecharKsMAG? Absolute K_s_-band magnitude (7)magphys.magAbs;em.optfloatnullableSimbadSimbad column added by the CDSmeta.refcharNEDSimbad column added by the CDSmeta.refchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main