J/MNRAS/469/347ivo://CDS.VizieR/J/MNRAS/469/347doi:10.26093/cds/vizier.74690347CDSSpector O.Brosch N.2024-08-17T20:19:22Z2020-04-21T13:45:54ZCDS support team

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

cds-question@unistra.frgalaxiescatalogsvisible-astronomysloan-photometryinfrared-photometrybroad-band-photometryultraviolet-photometryh-i-line-emissionWe have selected a sample of 41 extremely isolated galaxies (EIGs) from the local Universe using both optical and HI Arecibo Legacy Fast ALFA survey redshifts. Narrow-band H{alpha} and wide-band imaging along with public data were used to derive star formation rates (SFRs), star formation histories and morphological classifications for the EIGs. We have found that the extreme isolation of the EIGs does not affect considerably their star formation compared to field galaxies. EIGs are typically 'blue cloud' galaxies that fit the 'main sequence of star-forming galaxies' and may show asymmetric star formation and strong compact star-forming regions. We discovered surprising environmental dependences of the HI content, M_HI_, and of the morphological type of EIGs; the most isolated galaxies (of subsample EIG-1) have lower M_HI_ on average (with 2.5{sigma} confidence) and a higher tendency to be early types (with 0.94 confidence) compared to the less isolated galaxies of subsample EIG-2. To the best of our knowledge, this is the first study that finds an effect in which an isolated sample shows a higher fraction of early types compared to a less isolated sample. Both early-type and late-type EIGs follow the same colour-to-M_*_, SFR-to-M_*_ (main sequence) and M_HI_-to-M_*_ relations. This indicates that the mechanisms and factors governing star formation, colour and the M_HI_-to-M_*_ relation are similar in early-type and late-type EIGs, and that the morphological type of EIGs is not governed by their M_HI_ content, colour or SFR.2017MNRAS.469..347Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/469/347CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/82 : Catalogue of Isolated Galaxies (Karachentseva+, 1986)J/A+A/411/381 : CO observation of isolated galaxies (Sauty+, 2003)J/AJ/129/2062 : SDSS DR1 isolated galaxies (Allam+, 2005)J/MNRAS/434/336 : Nuclear activity in isolated galaxiesJ/AJ/139/2525 : UNAM-KIAS catalog of isolated galaxiesJ/ApJ/788/L39 : AMIGA galaxies structural parameters (Fernandez+, 2014)J/A+A/436/443 : AMIGA. I. Velocities of CIG galaxiesJ/A+A/449/937 : AMIGA. II. Morphological refinement (Sulentic+, 2006)J/A+A/462/507 : AMIGA. III. IRAS data (Lisenfeld+, 2007)J/A+A/470/505 : AMIGA. IV. Neighbours around CIG galaxies (Verley+, 2007)J/A+A/485/475 : AMIGA. VI. Radio fluxes of the isolated galaxiesJ/A+A/486/73 : AMIGA. VII. FIR and radio study (Sabater+, 2008)J/A+A/532/A117 : AMIGA. VIII. Flux ratio asymmetry parameter (Espada+, 2011)J/A+A/534/A102 : AMIGA. IX. Molecular gas properties (Lisenfeld+, 2011)J/A+A/540/A47 : AMIGA. X. Isolated galaxy colors (Fernandez+, 2012)J/A+A/545/A15 : AMIGA. XI. Optical nuclear activity (Sabater+, 2012)J/A+A/560/A9 : AMIGA. Revision of the isolation degreeJ/A+A/609/A17 : AMIGA XIII. HI properties (Jones+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/469/347https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/469/347http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/469/347https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/469/347https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/469/347http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/469/347GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/469/347/sources (EIG sub-samples (from Paper I))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/469/347/sources?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/469/347/sources?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/469/347/sources?GETtext/xml+votable180.050000true117.67514.7880560.0055555555555555566/190 816 824-825 904 2097 2176 4134 4211 4259 4641 8220 8266 8332 8388 8419 12759 13339 13377 13408 19923 19947 22390 22485 26359 26367 26554 26573 27116 27121 27448 27491 27537 27735 27819 27906 27954 31448 31471 31485 317148.157980699529898e-21 6.118840631666147e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/469/347?format=asciiUVOpticalInfraredRadiodefaultJ/MNRAS/469/347/sourcesEIG sub-samples (from Paper I)SimbadNameSimbad column added by the CDSmeta.idcharNameNED Namemeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEIGEIG designation (1)meta.id;meta.maincharALFALFAALFALFA name (HIHHMMSS.s+DDMMSS)meta.idcharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainczHeliocentric radial velocitykm/sspect.dopplerVeloc;pos.heliocentricinte_czHeliocentric radial velocity errorkm/sstat.errorintJ/MNRAS/469/347/table2Apparent SDSS magnitudesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEIGEIG designationmeta.id;meta.maincharn_EIG[a-d] Note on EIG (1)meta.notecharumag? SDSS u magnitudemagphot.mag;em.opt.Ufloatnullablee_umag? SDSS u magnitude errormagstat.error;phot.magfloatnullablegmag? SDSS g magnitudemagphot.mag;em.opt.Bfloatnullablee_gmag? SDSS g magnitude errormagstat.error;phot.magfloatnullablermag? SDSS r magnitudemagphot.mag;em.opt.Rfloatnullablee_rmag? SDSS r magnitude errormagstat.error;phot.magfloatnullableimag? SDSS i magnitudemagphot.mag;em.opt.Ifloatnullablee_imag? SDSS i magnitude errormagstat.error;phot.magfloatnullablezmag? SDSS z magnitudemagphot.mag;em.opt.Ifloatnullablee_zmag? SDSS z magnitude errormagstat.error;phot.magfloatnullableJ/MNRAS/469/347/table3Apparent UBVRI magnitudesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEIGEIG designationmeta.id;meta.maincharUmag? U magnitudemagphot.mag;em.opt.Ufloatnullablee_Umag? U magnitude errormagstat.error;phot.magfloatnullableBmag? B magnitudemagphot.mag;em.opt.Bfloatnullablee_Bmag? B magnitude errormagstat.error;phot.magfloatnullableVmag? V magnitudemagphot.mag;em.opt.Vfloatnullablee_Vmag? V magnitude errormagstat.error;phot.magfloatnullableRmag? R magnitudemagphot.mag;em.opt.Rfloatnullablee_Rmag? R magnitude errormagstat.error;phot.magfloatnullableImag? I magnitudemagphot.mag;em.opt.Ifloatnullablee_Imag? I magnitude errormagstat.error;phot.magfloatnullableJ/MNRAS/469/347/table4Morphological classification of the EIGsEIGEIG designationmeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTypeType (Late, Unknown or Early)src.classcharJ/MNRAS/469/347/table5GALEX apparent magnitudesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEIGEIG designationmeta.id;meta.maincharmFUV? FUV magnitudemagphot.mag;em.UV.100-200nmfloatnullablee_mFUV? FUV magnitude errormagstat.errorfloatnullablemNUVNUV magnitudemagphot.mag;em.UV.200-300nmfloate_mNUVNUV magnitude errormagstat.errorfloatJ/MNRAS/469/347/table62MASS apparent magnitudesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEIGEIG designationmeta.id;meta.maincharJmag? 2MASS J magnitudemagphot.mag;em.IR.Jfloatnullablee_Jmag? 2MASS J magnitude errormagstat.error;phot.magfloatnullableHmag? 2MASS H magnitudemagphot.mag;em.IR.Hfloatnullablee_Hmag? 2MASS H magnitude errormagstat.error;phot.magfloatnullableKsmag? 2MASS Ks magnitudemagphot.mag;em.IR.Kfloatnullablee_Ksmag? 2MASS Ks magnitude errormagstat.error;phot.magfloatnullableJ/MNRAS/469/347/table7ALFALFA HI datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEIGEIG designationmeta.id;meta.maincharW50Velocity width of the HI line profilekm/sspect.line.widthinte_W50Velocity width of the HI line profile errorkm/sstat.errorintFHITotal HI line fluxJy.km/sphot.flux.density;spect.linefloate_FHITotal HI line flux errorJy.km/sstat.errorfloatSNREstimated signal-to-noise ratio of the detectionstat.snrfloatlogMHIHI mass contentlog(solMass)phys.massfloate_logMHIHI mass content errorlog(solMass)stat.errorfloatCode[1/2] Category of the HI detection (1)meta.codeintJ/MNRAS/469/347/table8SF measurementsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEIGEIG designationmeta.id;meta.maincharEWEquivalent width0.1nmspect.line.eqWidthfloate_EWEquivalent width error0.1nmstat.error;spect.line.eqWidthfloatFHaH{alpha} fluxmW.m**-2phot.flux;em.line.Halphadoublee_FHaH{alpha} flux errormW.m**-2stat.errordoublel_W3magLimit flag on W3mag (1)meta.code.errorcharW3magWISE W3 magnitudemagphot.flux.density;em.IR.8-15umfloate_W3mag? WISE W3 magnitude errormagstat.error;phot.magfloatnullablel_W4magLimit flag on W4mag (1)meta.code.errorcharW4magWISE W4 magnitudemagphot.flux.density;em.IR.15-30umfloate_W4mag? WISE W4 magnitude errormagstat.error;phot.magfloatnullablel_fracHaextLimit flag on fracHaextmeta.code.errorcharfracHaextFraction of the total H{alpha} flux extinguished within the EIGphot.flux;arith.ratiofloate_fracHaext? Fraction of the total H{alpha} flux extinguished within the EIGstat.errorfloatnullableSFRStar formation ratesolMass/yrphys.SFRfloate_SFRStar formation rate errorsolMass/yrstat.error;phys.SFRfloatJ/MNRAS/469/347/table11Modelled stellar massrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEIGEIG designationmeta.id;meta.maincharlogM*Modelled stellar masslog(solMass)phys.massfloate_logM*Modelled stellar mass errorlog(solMass)stat.errorfloatJ/MNRAS/469/347/table12Dynamic massrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEIGEIG designationmeta.id;meta.maincharn_EIG[a] Note on EIG (1)meta.notechara24Semimajor axis at {mu}_R_=24mag/arcsec^2^kpcphys.size.smajAxisfloate_a24Semimajor axis at {mu}_R_=24mag/arcsec^2^ errorkpcstat.errorfloatb24/a24Semiminor axis at {mu}_R_=24mag/arcsec^2^phys.angSize.sminAxisfloate_b24/a24Semiminor axis at {mu}_R_=24mag/arcsec^2^ errorstat.errorfloatiEstimated inclination of the galaxydegsrcinte_iEstimated inclination of the galaxy errordegstat.errorintvrotRotational velocitykm/sphys.veloc.rotatinte_vrotRotational velocity errorkm/sstat.errorintlogMdyn24Dynamical mass (lower limit to the galactic total mass)log(solMass)phys.massfloate_logMdyn24Dynamical mass errorlog(solMass)stat.errorfloatMratioMass ratio, Mdyn24/(M*+MHI)phys.mass;arith.ratiofloate_MratioMass ratio, Mdyn24/(M*+MHI), errorstat.errorfloat