J/MNRAS/392/1034ivo://CDS.VizieR/J/MNRAS/392/1034doi:10.26093/cds/vizier.73921034CDSOliveira J.M.Jeffries R.D.van Loon J.T.2024-07-07T20:17:32Z2009-09-29T21:50:10ZCDS support team

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

cds-question@unistra.fropen-star-clusterspre-main-sequence-starshst-photometryinfrared-photometrystellar-massesNGC 6611 is the massive young cluster (2-3Myr) that ionizes the Eagle Nebula. We present very deep photometric observations of the central region of NGC 6611 obtained with the Hubble Space Telescope and the following filters: ACS/WFC F775W and F850LP and NIC2 F110W and F160W, loosely equivalent to ground-based IZJH filters. This survey reaches down to I~26mag. We construct the initial mass function (IMF) from ~1.5M_{sun}_ well into the brown dwarf regime (down to ~0.02M_{sun}_). We have detected 30-35 brown dwarf candidates in this sample. The low-mass IMF is combined with a higher-mass IMF constructed from the ground-based catalogue from Oliveira et al. We compare the final IMF with those of well-studied star-forming regions: we find that the IMF of NGC 6611 more closely resembles that of the low-mass star-forming region in Taurus than that of the more massive Orion Nebula Cluster. We conclude that there seems to be no severe environmental effect in the IMF due to the proximity of the massive stars in NGC 6611.2009MNRAS.392.1034Ohttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/392/1034CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/106/1906 : NGC 6611: A Cluster Caught in the Act (Hillenbrand+ 1993)J/A+AS/121/223 : Multiphotometry of NGC 6611 (de Winter+ 1997)J/A+AS/134/525 : NGC 6611 compiled catalog (Belikov+ 1999)J/A+AS/144/195 : UBVRI polarimetric observations in NGC 6611 (Orsatti+, 2000)J/A+A/395/823 : CCD {Delta}a-photometry of 5 open clusters (Paunzen+, 2002)J/A+A/437/467 : VLT-FLAMES survey of massive stars (Evans+, 2005)J/A+A/457/265 : VLT-FLAMES Survey of Massive Stars (Dufton+, 2006)J/AJ/132/1783 : UBVRI polarimetry of 25 stars in NGC 6611 (Orsatti+, 2006)J/A+A/462/245 : BVI photometry in NGC 6611 (Guarcello+, 2007)J/A+A/496/453 : Photometry of candidate members of NGC6611 (Guarcello+, 2009)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/392/1034https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/392/1034http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/392/1034https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/392/1034https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/392/1034http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/392/1034GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/392/1034/table1 (NGC 6611 cluster candidates selected from the HST photometric catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/392/1034/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/392/1034/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/392/1034/table1?GETtext/xml+votable180.050000true274.6920417-13.80700830.005555555555555556Cone search capability for table J/MNRAS/392/1034/table2 (*NGC 6611 cluster candidates selected from the photometric catalogue of Oliveira et al. (2005MNRAS.358L..21O))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/392/1034/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/392/1034/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/392/1034/table2?GETtext/xml+votable180.050000true274.6670417-13.783550.0055555555555555566/29463https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/392/1034?format=asciiInfrareddefaultJ/MNRAS/392/1034/table1NGC 6611 cluster candidates selected from the HST photometric catalogrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000) (G1)pos.eq.ra;meta.mainDEJ2000Declination (J2000) (G1)pos.eq.dec;meta.mainImagI magnitudemagphot.mag;em.opt.Ifloate_Imagrms uncertainty on Imagmagstat.error;phot.mag;em.opt.IfloatZmagZ magnitudemagphot.mag;em.opt.Ifloate_Zmagrms uncertainty on Zmagmagstat.error;phot.mag;em.opt.IfloatJmagJ magnitudemagphot.mag;em.IR.Jfloate_Jmagrms uncertainty on Jmagmagstat.error;phot.mag;em.IR.JfloatHmagH magnitudemagphot.mag;em.IR.Hfloate_Hmagrms uncertainty on Hmagmagstat.error;phot.mag;em.IR.HfloatE(B-V)? Extinction determined using the 2Myr isochronemagphot.color.excessfloatnullablee_E(B-V)? rms uncertainty on E(B-V)magstat.errorfloatnullableE(B-V)3? Extinction determined using the 3Myr isochronemagphot.color.excessfloatnullablee_E(B-V)3? rms uncertainty on E(B-V)3magstat.errorfloatnullableMemberStatus (member or non member)meta.code.membercharM2Myr? Mass of PMS object assuming an age of 2MyrsolMassphys.massfloatnullableM3Myr? Mass of PMS object assuming an age of 3MyrsolMassphys.massfloatnullableJ/MNRAS/392/1034/table2*NGC 6611 cluster candidates selected from the photometric catalogue of Oliveira et al. (2005MNRAS.358L..21O)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ20002MASS Right ascension (J2000) (G1)pos.eq.ra;meta.mainDEJ20002MASS Declination (J2000) (G1)pos.eq.dec;meta.mainImagI magnitudemagphot.mag;em.opt.Ifloate_Imagrms uncertainty on Imagmagstat.error;phot.mag;em.opt.IfloatI-ZI-Z colour indexmagphot.color;em.opt.I;em.opt.Ifloate_I-Zrms uncertainty on I-Zmagstat.errorfloatJmagJ magnitudemagphot.mag;em.IR.Jfloate_Jmagrms uncertainty on Jmagmagstat.error;phot.mag;em.IR.JfloatHmagH magnitudemagphot.mag;em.IR.Hfloate_Hmagrms uncertainty on Hmagmagstat.error;phot.mag;em.IR.HfloatKmagK magnitudemagphot.mag;em.IR.Kfloate_Kmagrms uncertainty on Kmagmagstat.error;phot.mag;em.IR.KfloatL'mag? L' magnitude (centered at 3.77{mu}m)magphot.mag;em.IR.3-4umfloatnullablee_L'mag? rms uncertainty on L'magmagstat.error;phot.mag;em.IR.3-4umfloatnullableM2Myr? Mass of PMS object assuming an age of 2MyrsolMassphys.massfloatnullableM3Myr? Mass of PMS object assuming an age of 3MyrsolMassphys.massfloatnullable