J/MNRAS/520/5521ivo://CDS.VizieR/J/MNRAS/520/5521CDSSeo M.Ann H.B.2026-04-29T14:32:35Z2026-04-29T15:17:48ZCDS support team

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

cds-question@unistra.frdwarf-galaxiesgalaxieslocal-groupgalaxy-classification-systemsastrometryredshiftedstar-forming-regionsspectroscopyvisible-astronomyphotometryclassificationWe present the star formation histories (SFHs) of early-type dwarf galaxies, dSphs and dEs, in the local Universe within z = 0.01. The SFHs of early-type dwarf galaxies are characterized by pre-enriched, metal-poor old stellar populations, absence of moderately old stars that have ages of a few Gyr. There are some differences in the SFHs of dSphs and dEs. In particular, dSphs formed old (~> 10 Gyr old) metal-poor stars ~2 times more than dEs. The effects of reionization and feedback from supernova explosions are thought to be strong enough to remove the gas left, which prevent moderately old stellar populations in dSphs. In contrast, the ejected gases are not completely removed from dEs and fall back to ignite burst of star formation at a few Gyr after the first period of violent bursts of star formation, showing a suppression of star formation at lookback time ~=9.6 Gyr. The second peak of star formation at lookback time ~=4.5 Gyr in dEs produces moderately old stellar populations. Distinction between dSphs and dEs is useful to examine the SFHS of the early-type dwarfs since the cumulative SFHs are most closely related to their morphology. The stellar mass plays an important role in the SFHs of the early-type dwarfs as a driver of star formation, especially in galaxies with primordial origin.2023MNRAS.520.5521Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/520/5521CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/941/106 : X-SHOOTER/ALMA QSOs at 5.7<~z<~7.6. II. BH massesJ/ApJ/909/192 : HST/ACS photometry of Eridanus II (Gallart+, 2021)J/ApJ/789/147 : Star formation histories of LG dwarf galaxies (Weisz+, 2014)J/ApJ/786/74 : EW measurements of 6 Segue 1 red giants (Frebel+, 2014)J/ApJ/711/361 : Local Group dE galaxies. II. (Geha+, 2010)J/ApJ/679/194 : Low-z intergalactic medium. III. (Danforth+, 2008)J/ApJ/660/1186 : VCC galaxies classification with SDSS (Lisker+, 2007)J/A+A/645/A92 : Dwarf spheroidal galaxies in CenA group (Mueller+, 2021)J/A+A/630/A116 : Tucana dSph CMD and star formation history (Savino+, 2019)J/A+A/625/A94 : YSOs in early-type dwarf galaxies (Hamraz+, 2019)J/A+A/544/A73 : BVI photometry of Fornax dSph galaxy (de Boer+, 2012)J/A+A/384/371 : Kinematical data on early-type galaxies. VI (Simien+, 2002)J/ApJS/217/27 : Morphologies of z<0.01 SDSS-DR7 galaxies (Ann+, 2015)J/ApJS/217/32 : S4G galaxy morphologies in the CVRHS system (Buta+, 2015)J/ApJS/182/378 : HI and OVI absorbers in nearby Universe (Wakker+, 2009)J/AJ/147/13 : Disturbers of nearby giant galaxies (Karachentsev+, 2014)J/AJ/145/101 : Updated nearby galaxy catalog (Karachentsev+, 2013)J/AJ/144/4 : Properties of dwarf galaxies in the Local GroupJ/AJ/90/1681 : The Virgo Cluster Catalog (VCC) (Binggeli+, 1985)III/232 : STELIB: A library of stellar spectra at R~2000https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/520/5521https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/520/5521http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/520/5521https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/520/5521https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/520/5521http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/520/5521GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/520/5521/galaxies (Essential properties of our early-type dwarf galaxies for starlight with SDSS spectra)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/520/5521/galaxies?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/520/5521/galaxies?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/520/5521/galaxies?GETtext/xml+votable180.050000true193.50785694-1.508341110.0055555555555555565/2048 6577 6928 6935 6941 6943 6976 6978 6984 6986-6987 7008-7009 6/4439 4447 4511 4805 4807 4816 4826 4828 4840 4959 4991 5196 5429 5472 5628-5629 5635 5975 6087 6093 6161 6605 7232 7240-7241 8196-8197 8201-8202 8282 10512 10639 10648 10662 10671 10739 10742 10748 10767 10842 10912 10923 11026 11093 11176 11179 11261 11389 11435 11439 11443 11457 11776-11777 11791 11824 11938 17754 17761 25979 26072 26090-26091 26163 26210 26271 26304 26306-26307 26313 26316 26318 26330 26337 26340 26343 26348 26350-26351 26360 26362 26364 26367 26398 26432 26523 26528 26536 26538-26539 27090 27426 27507 27515 27518 27595 27603 27605 27653 27669 27671 27679 27717-27721 27723-27725 27727-27728 27730-27731 27733-27737 27739 27748 27750 27760-27761 27763 27769 27771 27856-27857 27859-27860 27863 27866 27868-27869 27880 27910 27916 27918 27935 27941-27943 27954 28041 28043 28045 28047-28050 28052-28053 28056 28061 28068 28140 28155 28178 28184 28201 28211 28215 28221 28223 28262 28288 28309 28316 28451 28463 28475 28491 28494-28495 28508 28517 28523 28528 28539 31403 31406-31407 36785 36787https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/520/5521?format=asciiOpticaldefaultJ/MNRAS/520/5521/galaxiesEssential properties of our early-type dwarf galaxies for starlight with SDSS spectrarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName of the galaxymeta.id;meta.maincharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainzHeliocentric spectroscopic redshiftsrc.redshiftdoubleTypeGalaxy type (1)src.morph.typecharSFHsSFHs from starlight codemeta.ref.urlcharFileNameData file name as (GNNNNNNNPop_cor.dat) of STARLIGHT output values logAge, L, Mini and Mcormeta.idcharSDSSDisplay the SDSS DR17 and 12 datameta.ref.urlintnullableCVCGDisplay the SDSS DR17 and 12 datameta.ref.urlintnullableSDSSdr12Display the online SDSS-DR12 data for the nearest objectmeta.ref.urlcharSimbadNameSimbad column added by the CDSmeta.idcharnullable