J/AJ/126/1665ivo://CDS.VizieR/J/AJ/126/1665doi:10.26093/cds/vizier.51261665CDSLiu W.M.Meyer M.R.Cotera A.S.Young E.T.2023-04-06T16:50:57Z2005-09-01T21:02:19ZCDS support team

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

cds-question@unistra.fropen-star-clustersphotometrymultiple-starsWe present an analysis of NICMOS observations of the embedded cluster associated with NGC 2024. An analysis of the cluster color-magnitude diagram (CMD) using the models of D'Antona & Mazzitelli and Baraffe et al. (published in 1997MmSAI..68..807D and 1998, Cat. <J/A+A/337/403>, respectively) indicates that the ratio of intermediate-mass (1.0-10.0M_{sun}_) to low-mass (0.1-1.0M_{sun}_) stars is consistent with the stellar initial mass function (IMF) for the field. In addition to the CMD analysis, we present results on the multiplicity of stars in the region. Three companions (in a sample of 95 potential primaries) were found, with angular separations between 0.4" and 1.0", translating to a projected linear separation of 184-460AU for an estimated distance of 460pc. The completeness of binary detections is assessed using recovery fractions calculated by a series of tests using artificially generated companions to potential primaries in the data frames. We find that the binary fraction in NGC 2024 is consistent with that of Duquennoy & Mayor (published in 1991A&A...248..485D) for solar neighborhood stars over the range of separations and companion masses appropriate for our survey.2003AJ....126.1665Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/126/1665CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/126/1665https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/126/1665http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/126/1665https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/126/1665https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/126/1665http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/126/1665GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/126/1665/table1 (Objects Dectected in J and H Bands)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/126/1665/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/126/1665/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/126/1665/table1?GETtext/xml+votable180.050000true85.4220833-1.897750.0055555555555555566/22855https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/126/1665?format=asciiOpticaldefaultJ/AJ/126/1665/table1Objects Dectected in J and H BandsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[LMC2003]Sequential designation, N-NNa (1)charXpixThe X pixel coordinatepixfloatYpixThe Y pixel coordinatepixfloatRAJ2000Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000)pos.eq.dec;meta.mainJmag? The J-band magnitudemagfloatnullablee_Jmag? Error in JmagmagfloatnullableHmag? The H-band magnitudemagfloatnullablee_Hmag? Error in JmagmagfloatnullableBSC? Beck, Simon, & Close (2003ApJ...583..358B) identification, Cl* NGC 2024 BSC NN in SimbadintnullableBSC2? BSC number of the companionintnullableNoteAdditional noteschar