J/ApJ/736/90ivo://CDS.VizieR/J/ApJ/736/90doi:10.26093/cds/vizier.17360090CDSPaolillo M.Puzia T.H.Goudfrooij P.Zepf S.E.Maccarone T.J.,Kundu A.Fabbiano G.Angelini L.2013-02-12T14:33:41Z2013-01-24T14:09:44ZCDS support team

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

cds-question@unistra.frx-ray-binary-starsglobular-star-clustersgalaxieshst-photometryx-ray-sourcesWe present a wide-field study of the globular cluster (GC)/low-mass X-ray binary (LMXB) connection in the giant elliptical NGC 1399. The large field of view of the Advanced Camera for Surveys/WFC, combined with Hubble Space Telescope and Chandra high resolution, allow us to constrain the LMXB formation scenarios in elliptical galaxies. We confirm that NGC 1399 has the highest LMXB fraction in GCs of all nearby elliptical galaxies studied so far, even though the exact value depends on galactocentric distance due to the interplay of a differential GC versus galaxy light distribution and the GC color dependence. In fact, LMXBs are preferentially hosted by bright, red GCs out to >5R_eff_ of the galaxy light. The finding that GCs hosting LMXBs follow the radial distribution of their parent GC population argues against the hypothesis that the external dynamical influence of the galaxy affects the LMXB formation in GCs. On the other hand, field-LMXBs closely match the host galaxy light, thus indicating that they are originally formed in situ and not inside GCs. We measure GC structural parameters, finding that the LMXB formation likelihood is influenced independently by mass, metallicity, and GC structural parameters. In particular, the GC central density plays a major role in predicting which GCs host accreting binaries. Finally, our analysis shows that LMXBs in GCs are marginally brighter than those in the field, and in particular the only color-confirmed GC with L_X_>10^39^erg/s shows no variability, which may indicate a superposition of multiple LMXBs in these systems.2011ApJ...736...90Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/736/90CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/chandra : The Chandra Archive Log (CXC, 1999-2012)B/hst : HST Archived Exposures Catalog (STScI, 2007)J/A+A/513/A52 : Velocities of NGC 1399 globular clusters (Schuberth+, 2010)J/ApJS/192/10 : Chandra ACIS survey in 383 nearby galaxies. I. (Liu, 2011)J/ApJ/690/512 : LMXBs and globulars in early-type galaxies (Humphrey, 2009)J/A+A/477/L9 : Globular clusters around NGC 1399 (Schuberth+, 2008)J/ApJ/662/525 : LMXBs in globular clusters of 5 galaxies (Kundu+, 2007)J/MNRAS/382/1947 : CT1 photometry in NGC 1399 and NGC 4486 (Forte+, 2007)J/AJ/127/2114 : Globular clusters around NGC 1399 (Dirsch+, 2004)J/AJ/105/1762 : Globular clusters around NGC 1399 (Ostrov+ 1993)http://cxc.harvard.edu/ : Chandra X-ray observatory (CXC) home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/736/90https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/736/90http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/736/90https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/736/90https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/736/90http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/736/90GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/736/90/table3 (X-ray source catalog in NGC 1399)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/736/90/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/736/90/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/736/90/table3?GETtext/xml+votable180.050000true54.543333-35.4666110.0055555555555555566/34534 345352.76124552865182e-19 3.9057996558789745e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/736/90?format=asciiX-raydefaultJ/ApJ/736/90/table3X-ray source catalog in NGC 1399C-T1? Ground-based (C-T1) colormagphot.color;em.opt.U;em.opt.RfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqSource index numbermeta.id;meta.mainintRAJ2000[3] Hour of Right Ascension (J2000) (1)pos.eq.ra;meta.mainDEJ2000[35] Degree of Declination (J2000) (1)pos.eq.dec;meta.mainNCts[6/3920] Total net 0.5-8keV countsctphot.count;em.X-rayfloate_NCtsLower limit uncertainty in NCtsctstat.errorfloatE_NCtsUpper limit uncertainty in NCtsctstat.error;stat.maxfloatFlux[1/1567] The 0.5-8keV photon flux (10-7ph/s/cm2)count.ks**-1.s**-2phot.flux;em.X-rayfloate_FluxUncertainty in Fluxcount.ks**-1.s**-2stat.error;phot.fluxfloatHR1The (0.5-1keV)/(1-2keV) hardness ratiophot.flux;arith.ratiofloate_HR1? Uncertainty in HR1stat.errorfloatnullablef_HR1[i] Indicates an infinite HR1 uncertaintymeta.codecharHR2The (0.5-1keV)/(1-8keV) hardness ratiophot.flux;arith.ratiofloate_HR2? Uncertainty in HR2stat.errorfloatnullablef_HR2[i] Indicates an infinite HR2 uncertaintymeta.codecharVar[0/1] Variability flag, 1=variable (2)meta.code;src.varintSep[0/8.5] X-ray/optical positions separation (3)arcsecpos.angDistancefloatVmag[15.5/27.9] HST F606V band magnitudemagphot.mag;em.opt.RfloatSInd[0/1] SExtractor stellarity index (0=gal 1=star)src.class.starGalaxyfloatT1mag? Ground-based T1 band magnitudemagphot.mag;em.opt.Rfloatnullablezmag? ACS z band magnitudemagphot.mag;em.opt.Ifloatnullableg-z? ACS (g-z) color indexmagphot.color;em.opt;em.optfloatnullableXCatCross-match within 1.5" with Chandra ACIS X-ray sources (Cat. J/ApJS/192/10) and LMXBs from Cat. J/ApJ/662/525meta.ref.urlintnullable