J/AJ/146/145ivo://CDS.VizieR/J/AJ/146/145doi:10.26093/cds/vizier.51460145CDSMcQuinn K.B.W.Skillman E.D.Berg D.Cannon J.M.Salzer J.J.,Adams E.A.K.Dolphin A.Giovanelli R.Haynes M.P.Rhode K.L.2014-07-29T13:58:19Z2014-07-23T08:53:56ZCDS support team

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

cds-question@unistra.frgalaxiesinfrared-photometryvisible-astronomyphotometryLeo P is a low-luminosity dwarf galaxy discovered through the blind HI Arecibo Legacy Fast ALFA survey. The HI and follow-up optical observations have shown that Leo P is a gas-rich dwarf galaxy with both active star formation and an underlying older population, as well as an extremely low oxygen abundance. Here, we measure the distance to Leo P by applying the tip of the red giant branch (TRGB) distance method to photometry of the resolved stellar population from new Large Binocular Telescope V and I band imaging. We measure a distance modulus of 26.19^+0.17^_-0.50_mag corresponding to a distance of 1.72^+0.14^_0.40_Mpc. Although our photometry reaches 3mag below the TRGB, the sparseness of the red giant branch yields higher uncertainties on the lower limit of the distance. Leo P is outside the Local Group with a distance and velocity consistent with the local Hubble flow. While located in a very low-density environment, Leo P lies within ~0.5Mpc of a loose association of dwarf galaxies which include NGC 3109, Antlia, Sextans A, and Sextans B, and 1.1Mpc away from its next nearest neighbor, Leo A. Leo P is one of the lowest metallicity star-forming galaxies known in the nearby universe, comparable in metallicity to I Zw 18 and DDO 68, but with stellar characteristics similar to dwarf spheriodals (dSphs) in the Local Volume such as Carina, Sextans, and Leo II. Given its physical properties and isolation, Leo P may provide an evolutionary link between gas-rich dwarf irregular galaxies and dSphs that have fallen into a Local Group environment and been stripped of their gas.2013AJ....146..145Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/146/145CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/145/149 : ALFALFA discovery of Leo P. II. BVR photometry (Rhode+, 2013)J/AJ/142/170 : ALFALFA survey: the {alpha}.40 HI source catalog (Haynes+, 2011)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/146/145https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/146/145http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/146/145https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/146/145https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/146/145http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/146/145GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/146/145/table2 (LBT (Large Binocular Telescope) catalog of resolved stars in Leo P)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/146/145/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/146/145/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/146/145/table2?GETtext/xml+votable180.050000true155.430291718.08704440.0055555555555555566/44331.9821045660507152e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/146/145?format=asciiOpticalInfrareddefaultJ/AJ/146/145/table2LBT (Large Binocular Telescope) catalog of resolved stars in Leo PrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStar[1/438] Running index number identifier \dicS{[MSB2013] NNN} in Simbadmeta.id;meta.mainintprimaryRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainVmagIntrinsic V band magnitudemagphot.mag;em.opt.Vfloate_VmagThe 1{sigma} error in Vmagmagstat.error;phot.mag;em.opt.VfloatImagIntrinsic I band magnitudemagphot.mag;em.opt.Ifloate_ImagThe 1{sigma} error in Imagmagstat.error;phot.mag;em.opt.Ifloat