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dc.contributor.authorGuarcello, M.G.
dc.contributor.authorWright, N.J.
dc.contributor.authorDrake, J.J.
dc.contributor.authorAldcroft, T.
dc.contributor.authorKashyap, V.L.
dc.contributor.authorGarcía-Alvarez, D.
dc.contributor.authorDrew, J.E.
dc.date.accessioned2013-06-05T07:15:55Z
dc.date.available2013-06-05T07:15:55Z
dc.date.issued2012-10-01
dc.identifier.citationGuarcello , M G , Wright , N J , Drake , J J , Aldcroft , T , Kashyap , V L , García-Alvarez , D & Drew , J E 2012 , ' Optical photometric GTC/OSIRIS observations of the young massive association Cygnus OB2 ' , Astrophysical Journal, Supplement Series , vol. 202 , no. 2 , 19 . https://doi.org/10.1088/0067-0049/202/2/19
dc.identifier.issn0067-0049
dc.identifier.otherPURE: 1896184
dc.identifier.otherPURE UUID: f2720629-0fd5-42ad-9e49-9191e00014c7
dc.identifier.otherScopus: 84866898300
dc.identifier.urihttp://hdl.handle.net/2299/10699
dc.description.abstractIn order to fully understand the gravitational collapse of molecular clouds, the star formation process, and the evolution of circumstellar disks, these phenomena must be studied in different Galactic environments with a range of stellar contents and positions in the Galaxy. The young massive association Cygnus OB2, in the Cygnus-X region, is a unique target to study how star formation and the evolution of circumstellar disks proceed in the presence of a large number of massive stars. We present a catalog obtained with recent optical observations in the r, i, z filters with OSIRIS, mounted on the 10.4 m Gran Telescopio CANARIAS telescope, which is the deepest optical catalog of Cyg OB2 to date. The catalog consists of 64,157 sources down to M = 0.15 M at the adopted distance and age of Cyg OB2. A total of 38,300 sources have good photometry in all three bands. We combined the optical catalog with existing X-ray data of this region, in order to define the cluster locus in the optical diagrams. The cluster locus in the r - i versus i - z diagram is compatible with an extinction of the optically selected cluster members in the 2.64 <A <5.57 range. We derive an extinction map of the region, finding a median value of A = 4.33 in the center of the association, decreasing toward the northwest. In the color-magnitude diagrams, the shape of the distribution of main-sequence stars is compatible with the presence of an obscuring cloud in the foreground ∼850 ± 25 pc from the Sun.en
dc.language.isoeng
dc.relation.ispartofAstrophysical Journal, Supplement Series
dc.rightsOpen
dc.titleOptical photometric GTC/OSIRIS observations of the young massive association Cygnus OB2en
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionScience & Technology Research Institute
dc.contributor.institutionCentre for Astrophysics Research
dc.description.statusPeer reviewed
dc.identifier.urlhttp://www.scopus.com/inward/record.url?scp=84866898300&partnerID=8YFLogxK
dc.relation.schoolSchool of Physics, Astronomy and Mathematics
dc.description.versiontypeSubmitted Version
dcterms.dateAccepted2012-10-01
rioxxterms.versionSMUR
rioxxterms.versionofrecordhttps://doi.org/10.1088/0067-0049/202/2/19
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstypeOpen


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