J/AJ/161/138ivo://CDS.VizieR/J/AJ/161/138doi:10.26093/cds/vizier.51610138CDSHuston M.J.Luhman K.L.2022-03-10T12:37:05Z2021-05-14T06:36:28ZCDS support team

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

cds-question@unistra.frstar-forming-regionsbrown-dwarfshst-photometryWe have used archival infrared images obtained with the Wide Field Camera 3 on board the Hubble Space Telescope to constrain the initial mass function of low-mass stars and brown dwarfs in the W3 star-forming region. The images cover 438arcmin^2^, which encompasses the entire complex, and were taken in the filters F110W, F139M, and F160W. We have estimated extinctions for individual sources in these data from their colors and have dereddened their photometry accordingly. By comparing an area of the images that contains the richest concentration of previously identified W3 members to an area that has few members and is dominated by background stars, we have estimated the luminosity function for members of W3 with masses of 0.03-0.4M{sun}. That luminosity function closely resembles data in typical nearby star-forming regions that have much smaller stellar populations than W3 ( ~500 versus several thousand objects). Thus, we do not find evidence of significant variations in the initial mass function of low-mass stars and brown dwarfs with star-forming conditions, which is consistent with recent studies of other distant massive star-forming regions.2021AJ....161..138Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/161/138CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)VI/125 : Theoretical spectra of red giants and supergiants (Lancon+, 2007)J/ApJS/209/32 : Probable young stars in the MYStIX project (Broos+, 2013)J/A+A/561/A12 : W3 Main JHKs photometry (Bik+, 2014)J/ApJ/813/42 : O and B type stars in W3: first results (Kiminki+, 2015)J/AJ/153/46 : Spectroscopy of candidate members in Taurus (Luhman+, 2017)J/AJ/158/54 : New Taurus memb. from stellar to planetary masse (Esplin+,2019)J/ApJ/881/79 : Flamingos-2 near-infrared photometry in NGC 2244 (Muzic+, 2019)J/MNRAS/487/2771 : Gaia-DR2 distance to the W3 Complex (Navarete+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/161/138https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/161/138http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/161/138https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/161/138https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/161/138http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/161/138GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/161/138/table1 (Sources in WFC3 images of W3)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/161/138/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/161/138/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/161/138/table1?GETtext/xml+votable180.050000true36.1063688962.050073060.0055555555555555566/36491.0590977079788917e-19 1.3189343879298211e-18https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/161/138?format=asciidefaultJ/AJ/161/138/table1Sources in WFC3 images of W3DEJ2000[61.8/62.4] Declination (J2000)degpos.eq.dec;meta.mainindexed110mag[16.75/25.52]? F110W magnitude from HST WFC3magphot.mag;em.IR.Hfloatnullablee_110mag[0.02/0.2]? Error in 110magmagstat.errorfloatnullable139mag[15.06/23.57]? F139M magnitude from HST WFC3magphot.mag;em.IR.Hfloatnullablee_139mag[0.02/0.2]? Error in 139magmagstat.errorfloatnullable160mag[15.35/23.45]? F160W magnitude from HST WFC3magphot.mag;em.UV.100-200nmfloatnullablee_160mag[0.02/0.2]? Error in 160magmagstat.errorfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000[36.1/37.1] Right Ascension (J2000)degpos.eq.ra;meta.mainindexed