J/ApJ/800/51ivo://CDS.VizieR/J/ApJ/800/51doi:10.26093/cds/vizier.18000051CDSBoyer M.L.McQuinn K.B.W.Barmby P.Bonanos A.Z.Gehrz R.D.,Gordon K.D.Groenewegen M.A.T.Lagadec E.Lennon D.Marengo M.,McDonald I.Meixner M.Skillman E.Sloan G.C.Sonneborn G.,van Loon J.TH.Zijlstra A.2018-05-29T17:46:22Z2015-07-03T12:46:07ZCDS support team

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

cds-question@unistra.frgalaxiesinfrared-photometrygiant-starsThe DUSTiNGS survey (DUST in Nearby Galaxies with Spitzer) is a 3.6 and 4.5{mu}m imaging survey of 50 nearby dwarf galaxies designed to identify dust-producing asymptotic giant branch (AGB) stars and massive stars. Using two epochs, spaced approximately six months apart, we identify a total of 526 dusty variable AGB stars (sometimes called "extreme" or x-AGB stars; [3.6]-[4.5]>0.1mag). Of these, 111 are in galaxies with [Fe/H]<-1.5 and 12 are in galaxies with [Fe/H]<-2.0, making them the most metal-poor dust-producing AGB stars known. We compare these identifications to those in the literature and find that most are newly discovered large-amplitude variables, with the exception of {approx}30 stars in NGC185 and NGC147, 1 star in IC1613, and 1 star in Phoenix. The chemical abundances of the x-AGB variables are unknown, but the low metallicities suggest that they are more likely to be carbon-rich than oxygen-rich and comparisons with existing optical and near-IR photometry confirm that 70 of the x-AGB variables are confirmed or likely carbon stars. We see an increase in the pulsation amplitude with increased dust production, supporting previous studies suggesting that dust production and pulsation are linked. We find no strong evidence linking dust production with metallicity, indicating that dust can form in very metal-poor environments.2015ApJ...800...51Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/800/51CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/216/10 : DUSTiNGS. I. The Good Source Catalog (Boyer+, 2015)J/AJ/149/78 : SAGE-SMC survey candidate IR variables (Polsdofer+, 2015)J/MNRAS/446/1584 : IRAC point sources for M32 (Jones+, 2015)J/A+A/566/A44 : gr photometry of Sextans A and Sextans B (Bellazzini+, 2014)J/MNRAS/439/2618 : VISTA variables in Sagittarius dSph (McDonald+, 2014)J/MNRAS/427/2647 : Sgr dSph stars spectral classification (McDonald+, 2012)J/ApJ/753/71 : Mass-loss return from LMC evolved stars. VI. (Riebel+, 2012)J/AJ/144/4 : Dwarf galaxy param. in the Local Group (McConnachie+, 2012)J/AJ/142/103 : Cool evolved stars in SAGE-SMC (Boyer+, 2011)J/A+A/532/A78 : Long-period variables in NGC 147 and NGC 185 (Lorenz+, 2011)J/ApJS/193/23 : Fundamental stellar param. in 47 Tucanae (McDonald+, 2011)J/MNRAS/411/1597 : LMC point source classification in SAGE-Spec (Woods+, 2011)J/AcA/59/239 : VI LCs of LMC long-period variables (Soszynski+, 2009)J/A+A/503/913 : Synthetic spectrophotom. for C-rich giants (Aringer+, 2009)J/ApJ/697/1993 : Spitzer study of AGB stars. III. (Boyer+, 2009)J/AJ/137/4810 : LMC-SAGE AGB star candidates (Srinivasan+, 2009)J/MNRAS/394/795 : AGB stars in Fornax dSph galaxy (Whitelock+, 2009)J/AJ/137/3139 : LMC SAGE. New variable evolved stars and YSOs (Vijh+, 2009)J/AJ/136/1242 : LMC long-period variables from MACHO (Fraser+, 2008)J/MNRAS/385/1045 : JHKsIc of AGB in Phoenix dwarf gal. (Menzies+, 2008)J/AJ/135/1395 : omega Cen Spitzer photometry (Boyer+, 2008)J/ApJ/664/850 : Spitzer observations of stars in M33 (McQuinn+, 2007)J/MNRAS/376/313 : Carbon star in Magellanic Cloud (Groenewegen+, 2007)J/AJ/132/2268 : SAGE calibration stars (Meixner+, 2006)J/MNRAS/369/751 : Near-infrared photometry of carbon stars (Whitelock+, 2006)J/A+A/445/69 : JHK' photometry of C stars in NGC 147 (Sohn+, 2006)J/A+A/424/125 : Carbon stars in IC10 (Demers+, 2004)J/A+A/418/33 : RI photometry of C stars in NGC 147 (Battinelli+, 2004)J/A+A/417/479 : RI photometry of NGC 185 carbon stars (Battinelli+, 2004)J/A+A/416/111 : C stars in Wolf-Lundmark-Melotte galaxy (Battinelli+, 2004)J/A+A/403/93 : AGB stars photometry in NGC 185 and NGC 147 (Nowotny+, 2003)J/A+A/367/759 : Variable stars in IC 1613 (Mantegazza+, 2001)J/A+A/363/29 : Variable stars in IC 1613 (Antonello+, 2000)J/AJ/120/1801 : C stars in Pegasus, DDO 210 and Tucana (Battinelli+, 2000)J/AJ/119/2780 : C stars in IC 1613 (Albert+, 2000)J/A+AS/97/729 : JHKL'M obs. of O-Rich late-type star (Le Bertre 1993)http://irsa.ipac.caltech.edu/data/SPITZER/DUSTiNGS/ : DUSTiNGS IRSA home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/800/51https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/800/51http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/800/51https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/800/51https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/800/51http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/800/51GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/800/51/table3 (Variable star candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/800/51/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/800/51/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/800/51/table3?GETtext/xml+votable180.050000true11.54062538.009250.005555555555555556Cone search capability for table J/ApJ/800/51/table1 (Variable AGB and x-AGB star candidates summary)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/800/51/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/800/51/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/800/51/table1?GETtext/xml+votable180.050000true11.415833338.04111110.0055555555555555566/619 2110 2216 2229 2234 2272 2565 2572 2573 2604 2611 2668 2669 2676 2746 2755 2774 2777 2780 2852 3042 3043 4410 4419 5287 5939 7416 8745 10769 12687 13655 17165 17229 18041 18926 19833 19990 20262 20436 20437 20440 20441 26487 26858 27000 27002 27351 28136 29699 35206 35212 38841 45423 48942 489433.9193497546148093e-20 6.185923063528282e-20https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/800/51?format=asciiInfrareddefaultJ/ApJ/800/51/table3Variable star candidatesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGalGalaxy identifier \linkRole{galaxy summary}meta.id;meta.maincharSeq[8412/227035] Variable star candidate GSC identifier (1)meta.idintRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.main<m3.6>[13.4/19.9] Mean Spitzer/IRAC 3.6 micron band magnitudemagphot.mag;em.IR.3-4umfloate_<m3.6>[0.02/0.2] The 1{sigma} error in <m3.6>magstat.errorfloat<m4.5>[13/19.5] Mean Spitzer/IRAC 4.5 micron band magnitudemagphot.mag;em.IR.4-8umfloate_<m4.5>[0.02/0.3] The 1{sigma} error in <m4.5>magstat.errorfloatA3.6[0.1/2] Spitzer 3.6um band amplitude (2)magsrc.var.amplitudefloate_A3.6[0.04/0.4] The 1{sigma} error in A3.6magstat.errorfloatA4.5[0/1.9] Spitzer 4.5um band amplitude (2)magsrc.var.amplitudefloate_A4.5[0.04/0.7] The 1{sigma} error in A4.5magstat.errorfloatsig[2/3] Variability detection {sigma} valueinstr.sensitivityintType[XAU] Star type (3)meta.codecharlogDdot[-9.5/-6.1]? Log of dust production rate (7)log(solMass.yr**-1)phys.mass.lossfloatnullableNep[2/3] Number of epochs (4)meta.numberintFlag[BEp] Variable flag (5)meta.code.errorcharNotesAdditional notes (6)meta.notecharJ/ApJ/800/51/table1Variable AGB and x-AGB star candidates summarySimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGalGalaxy identifiermeta.id;meta.maincharprimaryf_Gal[ad] Galaxy added or lacks completeness (1)meta.codechar[Fe/H][-2.3/-1.1]? Metallicity (2)log(Sun)phys.abund.Zfloatnullablee_[Fe/H][0.04/0.3]? [Fe/H] uncertaintylog(Sun)stat.error;phys.abund.FefloatnullableNagb2[0/13]? Number of variable AGB stars detected at the 2{sigma} level (3)meta.numberintnullableNagb3[0/9]? Number of variable AGB stars detected at the 3{sigma} level (3)meta.numberintnullableNx2[0/18]? Number of variable x-AGB stars detected at the 2{sigma} level (3)meta.numberintnullableNx3[0/217]? Number of variable x-AGB stars detected at the 3{sigma} level (3)meta.numberintnullableNvNumber of variable candidates for this galaxy (table3)meta.numberintnullable_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main