J/MNRAS/466/2006ivo://CDS.VizieR/J/MNRAS/466/2006doi:10.26093/cds/vizier.74662006CDSKacharov N.Battaglia G.Rejkuba M.Cole A.A.Carrera R.,Fraternali F.Wilkinson M.I.Gallart C.G.Irwin M.Tolstoy E.2024-08-17T20:17:43Z2017-01-24T12:55:31ZCDS support team

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

cds-question@unistra.frgalaxiesspectroscopygalaxy-rotationgiant-starslate-type-starsmetallicityradial-velocityTransition type dwarf galaxies are thought to be systems undergoing the process of transformation from a star-forming into a passively evolving dwarf, which makes them particularly suitable to study evolutionary processes driving the existence of different dwarf morphological types. Here we present results from a spectroscopic survey of ~200 individual red giant branch stars in the Phoenix dwarf, the closest transition type with a comparable luminosity to 'classical' dwarf galaxies. We measure a systemic heliocentric velocity Vhelio=-21.2+/-1.0km/s. Our survey reveals the clear presence of prolate rotation that is aligned with the peculiar spatial distribution of the youngest stars in Phoenix. We speculate that both features might have arisen from the same event, possibly an accretion of a smaller system. The evolved stellar population of Phoenix is relatively metal-poor (<[Fe/H]>=-1.49+/-0.04dex) and shows a large metallicity spread (sigma_[Fe/H]_=0.51+/-0.04dex), with a pronounced metallicity gradient of -0.13+/-0.01dex/arcmin similar to luminous, passive dwarf galaxies. We also report a discovery of an extremely metal-poor star candidate in Phoenix and discuss the importance of correcting for spatial sampling when interpreting the chemical properties of galaxies with metallicity gradients. This study presents a major leap forward in our knowledge of the internal kinematics of the Phoenix transition type dwarf galaxy and the first wide area spectroscopic survey of its metallicity properties.2017MNRAS.466.2006Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/466/2006CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/424/1113 : VI photometry in Phoenix dwarf galaxy (Battaglia+, 2012)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/466/2006https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/466/2006http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/466/2006https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/466/2006https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/466/2006http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/466/2006GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/466/2006/phxcat (The catalogue)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/466/2006/phxcat?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/466/2006/phxcat?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/466/2006/phxcat?GETtext/xml+votable180.050000true27.81820389-44.292313060.0055555555555555566/35206 35212https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/466/2006?format=asciidefaultJ/MNRAS/466/2006/phxcatThe catalogueNamePhotometric ID (1)meta.id;photcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000) (1)degpos.eq.ra;meta.mainDEJ2000Declination (J2000) (1)degpos.eq.dec;meta.mainVmagV band magnitude (1)magphot.mag;em.opt.Vfloate_Vmagrms uncertainty on Vmag (1)magstat.error;phot.mag;em.opt.VfloatImagI band magnitude (1)magphot.mag;em.opt.Ifloate_Imagrms uncertainty on Imag (1)magstat.error;phot.mag;em.opt.IfloatHRV? Heliocentric radial velocitykm/sspect.dopplerVeloc;pos.heliocentricfloatnullablee_HRV? rms uncertainty on HRVkm/sstat.errorfloatnullable[Fe/H]? Metallicityphys.abund.Zfloatnullablee_[Fe/H]? rms uncertainty on [Fe/H]stat.error;phys.abund.FefloatnullableEW1Equivalent width of the first CaT line0.1nmspect.line.eqWidthfloate_EW1rms uncertainty on EW10.1nmstat.errorfloatEW2Equivalent width of the second CaT line0.1nmspect.line.eqWidthfloate_EW2rms uncertainty on EW20.1nmstat.errorfloatEW3Equivalent width of the third CaT line0.1nmspect.line.eqWidthfloate_EW3rms uncertainty on EW30.1nmstat.errorfloatSNRSignal to noise per pixelstat.snr;instr.pixelintMemb[yes/no ] Member of Phxmeta.code.membercharSimbadSimbad column added by the CDSmeta.ref.urlchar