J/A+A/602/A115ivo://CDS.VizieR/J/A+A/602/A115doi:10.26093/cds/vizier.36020115CDSDamiani F.Pillitteri I.Prisinzano L.2019-12-03T10:12:08Z2017-06-26T07:08:15ZCDS support team

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

cds-question@unistra.frh-ii-regionsinfrared-sourcesinterstellar-mediumnebulaephotometrypre-main-sequence-starsx-ray-sourcesWe present the first extensive X-ray study of the North-America and Pelican star-forming region (NGC7000/IC5070), with the aim of finding and characterizing the young population of this cloud. X-ray data from Chandra (four pointings) and XMM-Newton (seven pointings) were reduced and source detection algorithm applied to each image. We complement the X-ray data with optical and near-IR data from the IPHAS, UKIDSS, and 2MASS catalogs, and with other published optical and Spitzer IR data. More than 700 X-ray sources are detected, the majority of which have an optical or NIR counterpart. This allowed us to identify young stars in different stages of formation. Less than 30% of X-ray sources are identified with a previously known young star. We argue that most X-ray sources with an optical or NIR counterpart, except perhaps for a few tens at near-zero reddening, are likely candidate members of the star-forming region, on the basis of both their optical and NIR magnitudes and colors, and of X-ray properties such as spectrum hardness or flux variations. They are characterized by a wide range of extinction, and sometimes near-IR excesses, both of which prevent derivation of accurate stellar parameters. The optical color-magnitude diagram suggests ages between 1-10Myrs. The X-ray members have a very complex spatial distribution with some degree of subclustering, qualitatively similar to that of previously known members. The detailed distribution of X-ray sources relative to the objects with IR excesses identified with Spitzer is sometimes suggestive of sequential star formation, especially near the 'Gulf of Mexico' region, probably triggered by the O5 star which illuminates the whole region. We confirm that around the O5 star no enhancement in the young star density is found, in agreement with previous results. Thanks to the precision and depth of the IPHAS and UKIDSS data used, we also determine the local optical-IR reddening law, and compute an updated reddening map of the entire region.2017A&A...602A.115Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/602/A115CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIX/50 : XMM-Newton Serendipitous Source Cat. 3XMM-DR6 (XMM-SSC, 2016)J/ApJS/193/25 : The NAN complex. II. MIPS observations (Rebull+, 2011)J/ApJS/224/40 : Catalog of Chandra ACIS point like sources (Wang+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/602/A115https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/602/A115http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/602/A115https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/602/A115https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/602/A115http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/602/A115GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/602/A115/sample (X-ray source properties (table 3) and identifications (table 4))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/602/A115/sample?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/602/A115/sample?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/602/A115/sample?GETtext/xml+votable180.050000true312.5167744.380370.005555555555555556Cone search capability for table J/A+A/602/A115/table5 (NIR-excess and Halpha-emission stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/602/A115/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/602/A115/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/602/A115/table5?GETtext/xml+votable180.050000true311.4029445.08670.0055555555555555565/3671 3840 3842 6/14679 14709 15364 15366-15367 15372 15374 153921.1166583743361574e-19 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/602/A115?format=asciiX-rayInfrareddefaultJ/A+A/602/A115/sampleX-ray source properties (table 3) and identifications (table 4)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintX-rayId[1/721] Unique X-ray source IDmeta.id;meta.mainintCXOIdIAU designation of Chandra X-ray detections (JHHMMSS.s+DDMMSS)meta.idcharXMMIdIAU designation of XMM X-ray detections (JHHMMSS.s+DDMMSS)meta.idcharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.maine_posPosition error of X-ray sourcearcsecstat.errorfloatCRateX-ray count-ratect/ksphot.count;em.X-raydoublee_CRateError on CRatect/ksstat.errorfloatACIS-HR1? Hardness ratio 1 for Chandra ACIS sourcesphot.flux;arith.ratiofloatnullableACIS-HR2? Hardness ratio 2 for Chandra ACIS sourcesphot.flux;arith.ratiofloatnullableXMM-HR1? Hardness ratio 1 for XMM EPIC sourcesphot.flux;arith.ratiofloatnullableXMM-HR2? Hardness ratio 2 for XMM EPIC sourcesphot.flux;arith.ratiofloatnullablelogLX? log of X-ray luminositylog(1e-07W)phys.luminosity;em.X-rayfloatnullableimag? Magnitude in i band from IPHASmagphot.mag;em.opt.Ifloatnullabler-i? Color index r-i from IPHASmagphot.color;em.opt.R;em.opt.Ifloatnullabler-Ha? Color index r-Halpha from IPHASmagphot.color;em.opt.R;em.line.HalphafloatnullableJmag? Magnitude in J band from UKIDSS/2MASSmagphot.mag;em.IR.JfloatnullableHmag? Magnitude in H band from UKIDSS/2MASSmagphot.mag;em.IR.HfloatnullableKmag? Magnitude in K band from UKIDSS/2MASSmagphot.mag;em.IR.KfloatnullableIR-excess[Y] Star with NIR excessmeta.codecharHa-emiss[Y] Star with Halpha emissionmeta.codechar[RGS2011]? Sequential number in Rebull et al. (2011, Cat. J/ApJS/193/25)meta.idintnullableJ/A+A/602/A115/table5NIR-excess and Halpha-emission starsHa-emiss[Y] Star with Halpha emissionmeta.codecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[722/994] Unique X-ray undetected member IDmeta.id;meta.mainintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainimag? Magnitude in i band from IPHASmagphot.mag;em.opt.Ifloatnullabler-i? Color index r-i from IPHASmagphot.color;em.opt.R;em.opt.Ifloatnullabler-Ha? Color index r-Halpha from IPHASmagphot.color;em.opt.R;em.line.HalphafloatnullableJmag? Magnitude in J band from UKIDSS/2MASSmagphot.mag;em.IR.JfloatnullableHmag? Magnitude in H band from UKIDSS/2MASSmagphot.mag;em.IR.HfloatnullableKmag? Magnitude in K band from UKIDSS/2MASSmagphot.mag;em.IR.KfloatnullableIR-excess[Y] Star with NIR excessmeta.codechar[RGS2011]? Sequential number in Rebull et al. (2011, Cat. J/ApJS/193/25)meta.idintnullableSimbadSimbad column added by the CDSmeta.ref.urlchar