J/ApJS/182/509ivo://CDS.VizieR/J/ApJS/182/509doi:10.26093/cds/vizier.21820509CDSDalessandro E.Beccari G.Lanzoni B.Ferraro F.R.Schiavon R.,Rood R.T.2010-03-26T03:08:35Z2010-03-26T04:00:04ZCDS support team

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

cds-question@unistra.frglobular-star-clustersphotometryWe present a multiwavelength photometric analysis of the globular cluster M2. The data set has been obtained by combining high-resolution (Hubble Space Telescope/WFPC2 and ACS) and wide-field (Galaxy Evolution Explorer) space observations and ground-based (MEGACAM-CFHT, EMMI-NTT) images. The photometric sample covers the entire cluster extension from the very central regions up to the tidal radius and beyond. It allows an accurate determination of the cluster center of gravity and other structural parameters derived from the star count density profile. Moreover, we study the Blue Straggler Star (BSS) population and its radial distribution. A total of 123 BSSs have been selected, and their radial distribution has been found to be bimodal (highly peaked in the center, decreasing at intermediate radii, and rising outward), as already found in a number of other clusters. We also searched for gradients in the red giant branch (RGB) and the asymptotic giant branch (AGB) populations.2009ApJS..182..509Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/182/509CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/324/915 : Blue stragglers in M3 (Ferraro+ 1997)J/AJ/117/2868 : BV photometry in M2 (NGC 7089) (Lee+, 1999)J/ApJ/663/267 : M5 blue straggler population M5 (Lanzoni+, 2007)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/182/509https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/182/509http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/182/509https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/182/509https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/182/509http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/182/509GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/182/509/table1 (The Blue Straggler Star (BSS) population of M2)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/182/509/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/182/509/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/182/509/table1?GETtext/xml+votable180.050000true323.371441111-0.8178863890.0055555555555555566/19091https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/182/509?format=asciiOpticaldefaultJ/ApJS/182/509/table1The Blue Straggler Star (BSS) population of M2recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBSSSource name (1)meta.id;meta.mainintRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainm255? HST/WFPC2 m_255_ band magnitudemagphot.mag;em.UV.200-300nmfloatnullableUmag? U band magnitudemagphot.mag;em.opt.UfloatnullableBmag? B band magnitudemagphot.mag;em.opt.BfloatnullableVmag? V band magnitudemagphot.mag;em.opt.VfloatnullableImag? I band magnitudemagphot.mag;em.opt.Ifloatnullablermag? r band magnitudemagphot.mag;em.opt.Rfloatnullable