J/ApJ/834/186ivo://CDS.VizieR/J/ApJ/834/186doi:10.26093/cds/vizier.18340186CDSDouglass K.A.Vogeley M.S.2020-01-29T14:39:12Z2017-08-10T15:21:22ZCDS support team

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

cds-question@unistra.frgalaxiesspectroscopychemical-abundancesredshiftedWe study how the cosmic environment affects galaxy evolution in the universe by comparing the metallicities of dwarf galaxies in voids with dwarf galaxies in more dense regions. Ratios of the fluxes of emission lines, particularly those of the forbidden [OIII] and [SII] transitions, provide estimates of a region's electron temperature and number density. From these two quantities and the emission line fluxes [OII]{lambda}3727, [OIII]{lambda}4363, and [OIII]{lambda}{lambda}4959,5007, we estimate the abundance of oxygen with the direct T_e_ method. We estimate the metallicity of 42 blue, star-forming void dwarf galaxies and 89 blue, star-forming dwarf galaxies in more dense regions using spectroscopic observations from the Sloan Digital Sky Survey Data Release 7, as reprocessed in the MPA-JHU value-added catalog. We find very little difference between the two sets of galaxies, indicating little influence from the large-scale environment on their chemical evolution. Of particular interest are a number of extremely metal-poor dwarf galaxies that are less prevalent in voids than in the denser regions.2017ApJ...834..186Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/834/186CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)V/139 : The SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012)J/AJ/119/32 : Survey of galaxies within nearby voids. II (Grogin+, 2000)J/A+A/448/955 : Abundances of emission galaxies in SDSS-DR3 (Izotov+, 2006)J/A+A/462/535 : Low-metallicity HII regions and galaxies (Yin+, 2007)J/AJ/144/16 : Optical & HI properties of galaxies in voids (Kreckel+, 2012)J/ApJ/765/140 : Stacked spectra of SDSS star forming galaxies (Andrews+, 2013)J/ApJS/208/10 : {kappa}-distribution effects in HII regions (Dopita+, 2013)J/A+A/550/A115 : Oxygen abundances and properties of galaxies (Hughes+, 2013)J/A+A/559/A114 : Updated O3N2 and N2 abundance indicators (Marino+, 2013)http://www.sdss.org/ : SDSS home pagehttp://wwwmpa.mpa-garching.mpg.de/SDSS/DR7/ : MPA-JHU for the SDSS-DR7 releasehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/834/186https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/834/186http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/834/186https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/834/186https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/834/186http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/834/186GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/834/186/table1 (Dwarf galaxy properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/834/186/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/834/186/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/834/186/table1?GETtext/xml+votable180.050000true140.0177917-0.50249170.0055555555555555566/4099 4102 4103 4107 4110 4129 8201 8210 21845 21871 21876 21878 21879 21883 21937 21948 21953 21956 21960 21986 22277 22284 25973 25978 25979 25980 26005 26006 26011 26022 26028 26033 26038 26039 26040 26046 26048 26049 26054 26055 26060 26064 26080 26084 26201 26203 26204 26221 26224 26230 26233 26265 26268 26279 26291 26297 26299 26306 26310 26324 26368 26371 26372 26382 26408 26967 26969 26975 26999 27030 27037 27038 27056 27062 27064 27073 27078 27081 27083 27085 27104 27105 27227 27241 27249 27256 27287 27290 27301 27324 27329 27335 27338 27340 27342 27344 27345 27352 27361 27362 27395 27402 27405 27426 27432 27654 27655 27656 27658 27660 27662 27664 31327 31341 31342 31349 31403 31404 31418 31423 31434 31498https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/834/186?format=asciidefaultJ/ApJ/834/186/table1Dwarf galaxy propertiesSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqKIAS-VAGC galaxy index number (1)meta.id;meta.mainintf_Seq[e] e = extreme low gas-phase metallicity (12+log(O/H)<7.6) galaxy; flag added by CDS according to table 3meta.codecharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainzsp[0.02/0.03] Spectroscopic redshiftsrc.redshiftfloatrMag[-17/-16.3] Absolute r band magnitudemagphys.magAbsfloatO/H[7/8.6] The 12+log(O/H) abundance (2)phys.abundfloate_O/H[0/0.7] Uncertainty in O/Hstat.error;phys.abundfloatLocLocation code (3)meta.notecharDR12Display data from the SDSS-DR12 photometric catalog (Alam+, 2015, V/147) within 1"meta.ref.urlcharPapIIDisplay data from Paper II (Douglass & Vogeley, 2017, J/ApJ/837/42)meta.ref.urlcharSloanDisplay the online SDSS data for the nearest objectmeta.ref.urlcharNEDNED column added by the CDSmeta.ref.urlchar