J/ApJ/741/86ivo://CDS.VizieR/J/ApJ/741/86doi:10.26093/cds/vizier.17410086CDSRangelov B.Prestwich A.H.Chandar R.2017-10-11T05:13:03Z2013-04-17T14:18:16ZCDS support team

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

cds-question@unistra.frglobular-star-clustersx-ray-binary-starshst-photometryWe present 23 candidate X-ray binaries with luminosities down to 1.8x10^36^erg/s, in the nearby starburst galaxy NGC 4449, from observations totaling 105ks taken with the ACIS-S instrument on the Chandra Space Telescope. We determine count rates, luminosities, and colors for each source, and perform spectral fits for sources with sufficient counts. We also compile a new catalog of 129 compact star clusters in NGC 4449 from high-resolution, multi-band optical images taken with the Hubble Space Telescope, doubling the number of clusters known in this galaxy. The UBVI, H{alpha} luminosities of each cluster are compared with predictions from stellar evolution models to estimate their ages and masses. We find strong evidence for a population of very young massive, black hole binaries, which comprise nearly 50% of the detected X-ray binaries in NGC 4449. Approximately a third of these remain within their parent star clusters, which formed {tau}<=6-8Myr ago, while others have likely been ejected from their parent clusters. We also find evidence for a population of somewhat older X-ray binaries, including both supergiant and Be-binaries, which appear to be associated with somewhat older {tau}~100-400Myr star clusters, and one X-ray binary in an ancient ({tau}~10Gyr) globular cluster. Our results suggest that detailed information on star clusters can significantly improve constraints on X-ray binary populations in star-forming galaxies.2011ApJ...741...86Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/741/86CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/chandra : The Chandra Archive Log (CXC, 1999-2012)B/hst : HST Archived Exposures Catalog (STScI, 2007)J/AJ/141/113 : HII regions of M51 and NGC 4449 (Gutierrez+, 2011)J/ApJS/192/10 : Chandra ACIS survey in 383 nearby galaxies. I. (Liu, 2011)J/AJ/137/3869 : Radio SNRs in 4 irregular galaxies (Chomiuk+, 2009)J/AZh/85/794 : UBVRH{alpha} photometry on 5 galaxies (Gusev+, 2008)J/ApJ/664/458 : Spectral fit of ULX sources (Devi+, 2007)J/ApJ/649/730 : ULX population in nearby galaxies from XMM (Winter+, 2006)J/ApJS/157/59 : Ultraluminous X-ray sources in nearby galaxies (Liu+, 2005)J/ApJ/602/231 : Chandra X-ray point sources in nearby gal. (Colbert+, 2004)J/AJ/124/3157 : Velocities in NGC 4449 (Valdez-Gutierrez+, 2002)J/A+AS/139/491 : BVI photometry of nearby galaxies (Makarova+, 1999)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/741/86https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/741/86http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/741/86https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/741/86https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/741/86http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/741/86GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/741/86/table2 (X-ray source catalog (23 X-ray binary candidates and one supernova remnant candidate))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/741/86/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/741/86/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/741/86/table2?GETtext/xml+votable180.050000true187.0030844.075690.005555555555555556Cone search capability for table J/ApJ/741/86/table5 (Star cluster catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/741/86/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/741/86/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/741/86/table5?GETtext/xml+votable180.050000true187.0539644.08311810.0055555555555555566/10911https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/741/86?format=asciiOpticaldefaultJ/ApJ/741/86/table2X-ray source catalog (23 X-ray binary candidates and one supernova remnant candidate)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[X0-9 ] X-ray source identification (<[RPC2011] XNN> in Simbad)meta.id;meta.maincharf_ID[b] b = Supernova remnantmeta.codecharRAJ2000Right ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainH1"Soft" color (1)phot.flux;arith.ratiofloatH2"Hard" color (1)phot.flux;arith.ratiofloatLXX-ray (0.3-8keV) luminosity in erg/s (2)1e-07Wphys.luminosity;em.X-raydoubleSimbadSimbad column added by the CDSmeta.refcharJ/ApJ/741/86/table5Star cluster catalogrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/129] Index number (<[RPC2011] NNN> in Simbad)meta.id;meta.mainintRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainU-BThe HST (U-B) color indexmagphot.color;em.opt.U;em.opt.BfloatnullableV-IThe HST (V-I) color indexmagphot.color;em.opt.V;em.opt.IfloatlogA[6/10.27] Log of the cluster age (1)log(yr)time.agefloat