J/A+A/676/A47ivo://CDS.VizieR/J/A+A/676/A47doi:10.26093/cds/vizier.36760047CDSJadhav V.V.Subramaniam A.Sagar R.2024-11-06T20:05:25Z2023-08-07T08:29:07ZCDS support team

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

cds-question@unistra.fropen-star-clustersultraviolet-photometryvisible-astronomyNGC 6791 is one of the richest old open clusters in the Milky Way. Its position above the Galactic plane and the number density makes it an interesting middle ground between Galactic open and globular clusters. We aim to detect the UV bright population of NGC 6791 using AstroSat/UVIT images in near-UV and far-UV filters and characterise the known post mass transfer systems such as blue straggler stars (BSSs). We identified 20 members with large UV flux (out of 91 cluster members among 1180 detections), suggestive of binarity, interactions or stellar activity using multi-wavelength spectral energy distribution analysis. We characterised 62 isolated cluster members, including five hot subdwarfs (sdA/sdB). Additionally, we detected ten sdA/sdB/extremely low mass white dwarf (ELM) type candidates hidden alongside other cluster members. Additionally, we report the discovery of four candidate blue lurkers, which are main sequence stars with mass accretion history. We report that this cluster has a variety of stellar (pre-)remnants, such as sdBs, sdAs, and ELM white dwarfs, that are by-products of binary evolution. The above are likely to be post mass transfer binaries found throughout the evolutionary phases from the main sequence to the post horizontal branch. Therefore, this dynamically old open cluster is unique, making it an ideal testbed for dynamical studies.2023A&A...676A..47Jhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/676/A47CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/355 : Gaia DR3 (Gaia Collaboration, 2022)J/A+A/640/A1 : Portrait Galactic disc (Cantat-Gaudin+, 2020)J/MNRAS/503/236 : UVIT catalog & membership of 6 open clusters (Jadhav+, 2021)J/AcA/72/77 : Variable star population in NGC 6791 (Sanjayan+, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/676/A47https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/676/A47http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/676/A47https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/676/A47https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/676/A47http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/676/A47GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/676/A47/table2 (Photometry and SED parameters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/676/A47/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/676/A47/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/676/A47/table2?GETtext/xml+votable180.050000true290.1825561137.706893060.0055555555555555566/14573 14575 14584 145861.9867573869263685e-19 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/676/A47?format=asciiUVOpticaldefaultJ/A+A/676/A47/table2Photometry and SED parameters_RA.icrsRight ascension (ICRS) at Epoch=J2016. (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.raindexed_DE.icrsDeclination (ICRS) at Epoch=J2016. (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.decindexedSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName (Star0-star90)meta.id;meta.maincharRA_ICRSRight ascension (ICRS) at Ep=2016degpos.eq.ra;meta.mainDE_ICRSDeclination (ICRS) at Ep=2016degpos.eq.dec;meta.mainGaiaDR3Gaia EDR3 source_idmeta.idGmag? Gaia DR3 mean G magnitudemagphot.mag;em.optfloatnullableBP-RP? Gaia DR3 BP minus RP colourmagphot.color;em.opt.B;em.opt.RfloatnullableF172M? UVIT/F172M magnitude (AB)magphot.mag;em.UVfloatnullablee_F172M? Error in F172M magnitudemagstat.errorfloatnullablee_TeA? Error in TeAKstat.errorfloatnullableN245M? UVIT/N245M magnitude (AB)magphot.mag;em.UVfloatnullablee_N245M? Error in N245M magnitudemagstat.errorfloatnullableN263M? UVIT/N263M magnitude (AB)magphot.mag;em.UVfloatnullablee_N263M? Error in N263M magnitudemagstat.errorfloatnullableN279N? UVIT/N279N magnitude (AB)magphot.mag;em.UVfloatnullablee_N279N? Error in N279N magnitudemagstat.errorfloatnullableTeA? Temperature of A componentKphys.temperaturefloatnullableLumA? Luminosity of A componentsolLumphys.luminosityfloatnullablee_LumA? Error in LumAsolLumstat.errorfloatnullableRadA? Radius of A componentsolRadphys.size.radiusfloatnullablee_RadA? Error in RAsolRadstat.errorfloatnullablemodelAModels used for SED fitting of A componentmeta.id;stat.fitcharTeB? Temperature of B componentKphys.temperaturefloatnullablee_TeB? Error in TeBKstat.errorfloatnullableLumB? Luminosity of B componentsolLumphys.luminosityfloatnullablee_LumB? Error in LumBsolLumstat.errorfloatnullableRadB? Radius of B componentsolRadphys.size.radiusfloatnullablee_RadB? Error in RBsolRadstat.errorfloatnullablemodelBModel used for SED fitting of B componentmeta.id;stat.fitcharCommentComments based on SED fitting (1)meta.notechar