J/A+A/429/837ivo://CDS.VizieR/J/A+A/429/837doi:10.26093/cds/vizier.34290837CDSCioni M.-R.L.Habing H.J.2005-03-06T08:04:54Z2005-03-06T09:03:38ZCDS support team

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

cds-question@unistra.frgalaxiesphotometryinfrared-photometrylate-type-starsObservations in the IJKs wave bands covering the central 20'x20' of the Local Group galaxy NGC 6822 have been made with the William Herschel Telescope in La Palma. They have allowed us to characterize, for the first time in the near-infrared across the whole galaxy, its late-type stellar population (i.e. red giant and asymptotic giant branch stars) and to derive from the ratio between carbon-rich and oxygen-rich asymptotic giant branch stars an indication about spatial variations in metallicity. These amount to about 1.56dex, twice of what has been previously found within each Magellanic Cloud using the same technique. We have calibrated our photometry on the DENIS (I-band) and 2MASS (J and Ks bands) data and obtained a distance modulus of (m-M)_0_=23.34(0.12) from the position of the tip of the RGB. The large scale distribution of late-type stars suggests that either the galaxy is viewed under a high inclination angle or it has a non-negligible thickness.2005A&A...429..837Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/429/837CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/denis : The DENIS database (DENIS Consortium, 2003)II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)II/228 : DENIS Catalogue toward Magellanic Clouds (DCMC) (Cioni+ 2000)J/AJ/123/832 : C star population in NGC 6822 (Letarte+, 2002)J/AJ/121/2020 : CTIO and WFPC2 photometry in NGC 6822 (Bianchi+, 2001)J/AJ/109/173 : BVR photometry of NGC 6822 (Marconi+ 1995)J/AJ/110/2715 : UBV photometry in NGC 6822, M31 and M33 (Massey+ 1995)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/429/837https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/429/837http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/429/837https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/429/837https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/429/837http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/429/837GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/429/837/cat (Catalog of IJKs sources detected in NGC 6822 (tables 1 and 2 of paper). Sources from table2 have no I magnitude.)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/429/837/cat?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/429/837/cat?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/429/837/cat?GETtext/xml+votable180.050000true296.10421806-14.921373060.0055555555555555566/29716 29718https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/429/837?format=asciiOpticalInfrareddefaultJ/A+A/429/837/catCatalog of IJKs sources detected in NGC 6822 (tables 1 and 2 of paper). Sources from table2 have no I magnitude.recnoRecord number assigned by the VizieR team. Should Not be used for identification.intRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainImag? I magnitudemagfloatnullablee_Imag? Error in I magnitudemagfloatnullablef_Imag? SExtractor flag in I magnitude (1)intnullableJmagJ magnitudemagfloate_JmagError in J magnitudemagfloatf_Jmag[0/2] SExtractor flag in J magnitude (1)intKsmagKs magnitudemagfloate_KsmagError in Ks magnitudemagfloatf_KsmagSExtractor flag in Ks magnitude (1)int