J/ApJ/797/91ivo://CDS.VizieR/J/ApJ/797/91doi:10.26093/cds/vizier.17970091CDSMineo S.Rappaport S.Levine A.Pooley D.Steinhorn B.Homan J.2018-01-03T05:31:16Z2017-08-22T13:29:12ZCDS support team

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

cds-question@unistra.frgalaxiesx-ray-binary-starsWe present a comprehensive study of the total X-ray emission from the colliding galaxy pair NGC 2207/IC 2163, based on Chandra, Spitzer, and GALEX data. We detect 28 ultraluminous X-ray sources (ULXs), 7 of which were not detected previously because of X-ray variability. Twelve sources show significant long-term variability, with no correlated spectral changes. Seven sources are transient candidates. One ULX coincides with an extremely blue star cluster (B-V=-0.7). We confirm that the global relation between the number and luminosity of ULXs and the integrated star-formation rate (SFR) of the host galaxy also holds on local scales. We investigate the effects of dust extinction and age on the X-ray binary (XRB) population on subgalactic scales. The distributions of N_X_ and L_X_ are peaked at L_IR_/L_NUV_~1, which may be associated with an age of ~10 Myr for the underlying stellar population. We find that approximately one-third of the XRBs are located in close proximity to young star complexes. The luminosity function of the XRBs is consistent with that typical for high-mass XRBs and appears unaffected by variability. We disentangle and compare the X-ray diffuse spectrum with that of the bright XRBs. The hot interstellar medium dominates the diffuse X-ray emission at E<~1 keV and has a temperature kT=0.28_-0.04_^+0.05^ keV and intrinsic 0.5-2 keV luminosity of 7.9x10^40^ erg/s, a factor of ~2.3 higher than the average thermal luminosity produced per unit SFR in local star-forming galaxies. The total X-ray output of NGC 2207/IC 2163 is 1.5x10^41^ erg/s, and the corresponding total integrated SFR is 23.7 M_{sun}_/yr.2014ApJ...797...91Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/797/91CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/121/182 : Photometry of Clusters in IC2163 and NGC2207 (Elmegreen+, 2001)J/ApJ/642/158 : IRAC flux densities in IC2163 and NGC2207 (Elmegreen+, 2006)J/AJ/133/220 : X-ray sources in galaxy pairs (Gruetzbauch+, 2007)J/ApJ/741/49 : ULX candidates in nearby galaxies (Swartz+, 2011)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/797/91https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/797/91http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/797/91https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/797/91https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/797/91http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/797/91GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/797/91/table8 (NGC 2207/IC2163: X-Ray Source Properties for ObsID 14914 (2012/12/30))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/797/91/table8?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/797/91/table8?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/797/91/table8?GETtext/xml+votable180.050000true94.05535-21.36690.005555555555555556Cone search capability for table J/ApJ/797/91/table7 (NGC 2207/IC2163: X-Ray Source Properties for ObsID 11228 (2010/07/18))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/797/91/table7?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/797/91/table7?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/797/91/table7?GETtext/xml+votable180.050000true94.06612-21.36730.005555555555555556Cone search capability for table J/ApJ/797/91/table9 (NGC 2207/IC2163: X-Ray Source Properties for ObsID 14799 (2013/04/07))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/797/91/table9?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/797/91/table9?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/797/91/table9?GETtext/xml+votable180.050000true94.05536-21.36690.005555555555555556Cone search capability for table J/ApJ/797/91/table10 (NGC 2207/IC2163: X-Ray Source Properties for ObsID 14915 (2013/08/24))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/797/91/table10?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/797/91/table10?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/797/91/table10?GETtext/xml+votable180.050000true94.05543-21.36690.005555555555555556Cone search capability for table J/ApJ/797/91/table11 (NGC 2207/IC2163: X-Ray Source Properties for the Combined Image)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/797/91/table11?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/797/91/table11?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/797/91/table11?GETtext/xml+votable180.050000true94.05537-21.36690.0055555555555555566/20875https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/797/91?format=asciidefaultJ/ApJ/797/91/table8NGC 2207/IC2163: X-Ray Source Properties for ObsID 14914 (2012/12/30)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSource[1/74] Source numbermeta.idintn_Source[D+*-/,] Note on Source (1)meta.notecharRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainCount1Net counts in broad (0.5-8 keV) bandctphot.count;em.X-rayfloate_Count1Uncertainty in Count1 (2)ctstat.errorfloatSigniBroadband source detection significance from wavdetect (3)stat.fit.goodness;instr.saturationfloatCount2Net counts in soft (0.5-2 keV) bandctphot.count;em.X-rayfloate_Count2Uncertainty in Count2 (4)ctstat.errorfloatCount3Net counts in hard (2-8 keV) bandctphot.count;em.X-rayfloate_Count3Uncertainty in Count3 (4)ctstat.errorfloatHRHardness ratio (5)phot.flux;arith.ratiofloate_HRUncertainty in HR (6)stat.errorfloatLXX-ray luminosity in the 0.5-8 keV band (10^38^ erg/s)1e+31Wphys.luminosity;em.X-rayfloate_LXUncertainty in LX1e+31Wstat.errorfloatFXX-ray flux in the 0.5-8 keV band (10^-14^ erg/cm^2^/s)1e-17W.m**-2phot.flux;em.X-rayfloate_FXUncertainty in FX1e-17W.m**-2stat.errorfloatJ/ApJ/797/91/table7NGC 2207/IC2163: X-Ray Source Properties for ObsID 11228 (2010/07/18)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSource[1/74] Source numbermeta.idintn_Source[D+*-/,] Note on Source (1)meta.notecharRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainCount1Net counts in broad (0.5-8 keV) bandctphot.count;em.X-rayfloate_Count1Uncertainty in Count1 (2)ctstat.errorfloatSigniBroadband source detection significance from wavdetect (3)stat.fit.goodness;instr.saturationfloatCount2Net counts in soft (0.5-2 keV) bandctphot.count;em.X-rayfloate_Count2Uncertainty in Count2 (4)ctstat.errorfloatCount3Net counts in hard (2-8 keV) bandctphot.count;em.X-rayfloate_Count3Uncertainty in Count3 (4)ctstat.errorfloatHRHardness ratio (5)phot.flux;arith.ratiofloate_HRUncertainty in HR (6)stat.errorfloatLXX-ray luminosity in the 0.5-8 keV band (10^38^ erg/s)1e+31Wphys.luminosity;em.X-rayfloate_LXUncertainty in LX1e+31Wstat.errorfloatFXX-ray flux in the 0.5-8 keV band (10^-14^ erg/cm^2^/s)1e-17W.m**-2phot.flux;em.X-rayfloate_FXUncertainty in FX1e-17W.m**-2stat.errorfloatJ/ApJ/797/91/table9NGC 2207/IC2163: X-Ray Source Properties for ObsID 14799 (2013/04/07)HRHardness ratio (5)phot.flux;arith.ratiofloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSource[1/74] Source numbermeta.idintn_Source[D+*-/,] Note on Source (1)meta.notecharRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainCount1Net counts in broad (0.5-8 keV) bandctphot.count;em.X-rayfloate_Count1Uncertainty in Count1 (2)ctstat.errorfloatSigniBroadband source detection significance from wavdetect (3)stat.fit.goodness;instr.saturationfloatCount2Net counts in soft (0.5-2 keV) bandctphot.count;em.X-rayfloate_Count2Uncertainty in Count2 (4)ctstat.errorfloatCount3Net counts in hard (2-8 keV) bandctphot.count;em.X-rayfloate_Count3Uncertainty in Count3 (4)ctstat.errorfloate_HRUncertainty in HR (6)stat.errorfloatLXX-ray luminosity in the 0.5-8 keV band (10^38^ erg/s)1e+31Wphys.luminosity;em.X-rayfloate_LXUncertainty in LX1e+31Wstat.errorfloatFXX-ray flux in the 0.5-8 keV band (10^-14^ erg/cm^2^/s)1e-17W.m**-2phot.flux;em.X-rayfloate_FXUncertainty in FX1e-17W.m**-2stat.errorfloatJ/ApJ/797/91/table10NGC 2207/IC2163: X-Ray Source Properties for ObsID 14915 (2013/08/24)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSource[1/74] Source numbermeta.idintn_Source[D+*-/,] Note on Source (1)meta.notecharRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainCount1Net counts in broad (0.5-8 keV) bandctphot.count;em.X-rayfloate_Count1Uncertainty in Count1 (2)ctstat.errorfloatSigniBroadband source detection significance from wavdetect (3)stat.fit.goodness;instr.saturationfloatCount2Net counts in soft (0.5-2 keV) bandctphot.count;em.X-rayfloate_Count2Uncertainty in Count2 (4)ctstat.errorfloatCount3Net counts in hard (2-8 keV) bandctphot.count;em.X-rayfloate_Count3Uncertainty in Count3 (4)ctstat.errorfloatHRHardness ratio (5)phot.flux;arith.ratiofloate_HRUncertainty in HR (6)stat.errorfloatLXX-ray luminosity in the 0.5-8 keV band (10^38^ erg/s)1e+31Wphys.luminosity;em.X-rayfloate_LXUncertainty in LX1e+31Wstat.errorfloatFXX-ray flux in the 0.5-8 keV band (10^-14^ erg/cm^2^/s)1e-17W.m**-2phot.flux;em.X-rayfloate_FXUncertainty in FX1e-17W.m**-2stat.errorfloatJ/ApJ/797/91/table11NGC 2207/IC2163: X-Ray Source Properties for the Combined ImagerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSource[1/74] Source numbermeta.idintn_Source[D+*-/,] Note on Source (1)meta.notecharRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainCount1Net counts in broad (0.5-8 keV) bandctphot.count;em.X-rayfloate_Count1Uncertainty in Count1 (2)ctstat.errorfloatSigniBroadband source detection significance from wavdetect (3)stat.fit.goodness;instr.saturationfloatCount2Net counts in soft (0.5-2 keV) bandctphot.count;em.X-rayfloate_Count2Uncertainty in Count2 (4)ctstat.errorfloatCount3Net counts in hard (2-8 keV) bandctphot.count;em.X-rayfloate_Count3Uncertainty in Count3 (4)ctstat.errorfloatHRHardness ratio (5)phot.flux;arith.ratiofloate_HRUncertainty in HR (6)stat.errorfloatLXX-ray luminosity in the 0.5-8 keV band (10^38^ erg/s)1e+31Wphys.luminosity;em.X-rayfloate_LXUncertainty in LX1e+31Wstat.errorfloatFXX-ray flux in the 0.5-8 keV band (10^-14^ erg/cm^2^/s)1e-17W.m**-2phot.flux;em.X-rayfloate_FXUncertainty in FX1e-17W.m**-2stat.errorfloatSimbadSimbad column added by the CDSmeta.ref.urlchar