J/MNRAS/508/3388ivo://CDS.VizieR/J/MNRAS/508/3388doi:10.26093/cds/vizier.75083388CDSGupta S.Jose J.More S.Das S.R.Herczeg G.J.Samal M.R.Guo Z.,Prakash P.Damian B.Takami M.Takahashi S.Ogura K.Terai T.,Pyo T.-S.2024-11-06T20:34:32Z2024-09-16T09:58:44ZCDS support team

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

cds-question@unistra.frstellar-associationsopen-star-clustersob-starsstar-forming-regionsastrometryvisible-astronomyinfrared-astronomyphotometryLow-mass star formation inside massive clusters is crucial to understand the effect of cluster environment on processes like circumstellar disc evolution, planet, and brown dwarf formation. The young massive association of Cygnus OB2, with a strong feedback from massive stars, is an ideal target to study the effect of extreme environmental conditions on its extensive low-mass population. We aim to perform deep multiwavelength studies to understand the role of stellar feedback on the IMF, brown dwarf fraction and circumstellar disc properties in the region. We introduce here, the deepest and widest optical photometry of 1.5{deg} diameter region centred at Cygnus OB2 in r_2_, i_2_, z, and Y-filters, using Subaru Hyper Suprime-Cam (HSC). This work presents the data reduction, source catalogue generation, data quality checks, and preliminary results about the pre-main sequence sources. We obtain 713529 sources in total, with detection down to ~28, 27, 25.5, and 24.5 mag in r_2_, i_2_, z, and Y-band, respectively, which is ~ 3 - 5 mag deeper than the existing Pan-STARRS and GTC/OSIRIS photometry. We confirm the presence of a distinct pre-main sequence branch by statistical field subtraction of the central 18 arcmin region. We find the median age of the region as ~5 +/- 2 Myr with an average disc fraction of ~9 per cent. At this age, combined with A_V_ ~ 6 - 8 mag, we detect sources down to a mass range of ~0.01-0.17 M_{sun}_. The deep HSC catalogue will serve as the groundwork for further studies on this prominent active young cluster.2021MNRAS.508.3388Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/508/3388CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/490/440 : Gaia view of Cygnus OB2 and Carina OB1 associationsJ/ApJ/713/871 : Sources in star-forming region Cyg-OB2 from X-rayJ/A+A/543/A101 : OB stars in Cygnus OB2 association (Comeron+, 2012)J/A+A/642/A168 : Cygnus OB2 O stars spectroscopic analysis (Berlanas+, 2020)J/A+A/464/211 : Chandra and near-IR obs. of Cyg OB2 (Albacete Colombo+, 2007)J/ApJS/184/84 : X-ray sources in Cyg OB2 region (Wright+, 2009)J/MNRAS/449/741 : The massive star population of Cygnus OB2 (Wright+, 2015)II/349 : The Pan-STARRS release 1 (PS1) Survey - DR1 (Chambers+, 2016)J/ApJS/202/19 : riz photometry in Cyg OB2 (Guarcello+, 2012)I/350 : Gaia EDR3 (Gaia Collaboration, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/508/3388https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/508/3388http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/508/3388https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/508/3388https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/508/3388http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/508/3388GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/508/3388/table4 (* table of HSC catalogue data)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/508/3388/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/508/3388/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/508/3388/table4?GETtext/xml+votable180.050000true308.6929838941.866093890.0055555555555555565/3673 6/14670-14671 14689https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/508/3388?format=asciiOpticalInfrareddefaultJ/MNRAS/508/3388/table4* table of HSC catalogue dataRAJ2000Right ascension (J2000) (RA)degpos.eq.ra;meta.mainindexedDEJ2000Declination (J2000) (Dec)degpos.eq.dec;meta.mainindexedr2mag? Apparent magnitude in subaru HSC broad-band optical filter r_2_ (r_2_)magphot.mag;em.optfloatnullablee_r2mag? Mean error on r2mag (r2_err)magstat.error;phot.magfloatnullablei2mag? Apparent magnitude in subaru HSC broad-band optical filter i_2_ (i_2_)magphot.mag;em.optfloatnullablee_i2mag? Mean error on i2mag (i_2_err)magstat.error;phot.magfloatnullablezmag? Apparent magnitude in subaru HSC broad-band near infrared filter z (z)magphot.mag;em.opt.Ifloatnullablee_zmag? Mean error on zmag (z_err)magstat.error;phot.magfloatnullableYmag? Apparent magnitude in subaru HSC broad-band near infrared filter Y (Y)magphot.mag;em.IR.Jfloatnullablee_Ymag? Mean error on Y (Y_err)magstat.error;phot.magfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint