J/ApJ/883/6ivo://CDS.VizieR/J/ApJ/883/6doi:10.26093/cds/vizier.18830006CDSUchiyama M.Ichikawa K.2021-07-05T08:33:01Z2021-03-11T07:16:44ZCDS support team

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

cds-question@unistra.fryoung-stellar-objectsinfrared-photometryWe systematically investigate the mid-infrared (MIR; {lambda}>3{mu}m) time variability of uniformly selected ~800 massive young stellar objects (MYSOs) from the Red Midcourse Space Experiment Source survey. Out of the 806 sources, we obtain reliable 9yr long MIR magnitude variability data of 331 sources at the 3.4{mu}m (W1) and 4.6{mu}m (W2) bands by cross-matching the MYSO positions with ALLWISE and NEOWISE catalogs. After applying the variability selections using ALLWISE data, we identify five MIR-variable candidates. The light curves show various classes, with the periodic, plateau-like, and dipper features. Out of the obtained two color-magnitude diagram of W1 and W1-W2, one shows "bluer when brighter and redder when fainter" trends in variability, suggesting change in extinction or accretion rate. Finally, our results show that G335.9960-00.8532 has a periodic light curve, with an ~690d cycle. Spectral energy density model fitting results indicate that G335.9960-00.8532 is a relatively evolved MYSO; thus, we may be witnessing the very early stages of a hyper- or ultra-compact HII region, a key source for understanding MYSO evolution.2019ApJ...883....6Uhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/883/6CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/114 : MSX6C Infrared Point Source Catalog (Egan+ 2003)II/328 : AllWISE Data Release (Cutri+ 2013)J/A+A/461/183 : Variability of classical T Tauri (Grankin+, 2007)J/A+A/461/11 : Radio observations of MYSO candidates (Urquhart+, 2007)J/A+A/474/891 : 13CO obs. of YSOs in South Gal. plane (Urquhart+, 2007)J/A+A/487/253 : The RMS survey: ^13^CO observations of YSOs (Urquhart+ 2008)J/A+A/498/147 : High mass protostellar objects parameters (Grave+, 2009)J/A+A/501/539 : RMS survey. 6cm observations of YSOs (Urquhart+, 2009)J/ApJ/717/L133 : Formaldehyde maser flares in IRAS 18566+0408 (Araya+, 2010)J/ApJ/733/50 : MIR phot. monitoring of the ONC (Morales-Calderon+, 2011)J/MNRAS/424/1925 : Spectrocopic Binarity of O and B type stars (Chini+, 2012)J/ApJ/754/45 : IR properties of Swift/BAT X-ray AGNs (Ichikawa+, 2012)J/ApJS/208/11 : Red MSX Source Survey: massive protostars (Lumsden+, 2013)J/A+A/561/A2 : 36 accreting YSOs emission lines (Alcala+, 2014)J/AJ/147/82 : Monitoring of disk-bearing stars in NGC 2264 (Cody+, 2014)J/AJ/148/122 : YSOVAR: infrared photometry in Lynds 1688 (Gunther+, 2014)J/ApJ/792/30 : NEOWISE magnitudes for near-Earth objects (Mainzer+, 2014)J/A+A/591/A149 : Hi-GAL. inner Milky Way: +68>=l>=70 (Molinari+, 2016)J/ApJ/835/74 : IR phot. of AGNs in Swift/BAT 70 month (Ichikawa+, 2017)J/A+A/619/A41 : Photometric variability of massive YSOs (Teixeira+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/883/6https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/883/6http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/883/6https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/883/6https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/883/6http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/883/6GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/883/6/table1 (Properties of selected variable sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/883/6/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/883/6/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/883/6/table1?GETtext/xml+votable180.050000true306.01237.610.0055555555555555566/14622 37848 41804 42212 423928.157980699529898e-21 6.513807192489934e-20https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/883/6?format=asciiInfrareddefaultJ/ApJ/883/6/table1Properties of selected variable sourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMSX6CObject name (GLLL.llll+BB.bbbb)meta.id;meta.maincharprimaryRAJ2000[136.1/306.1] Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-56.3/37.7] Declination (J2000)degpos.eq.dec;meta.mainW1mag[7.94/8.63] WISE W1 (3.4um) band magnitude (1)magphot.mag;em.IR.3-4umfloatW2mag[6.36/6.85]? WISE W2 (4.6um) band magnitude (1)magphot.mag;em.IR.4-8umfloatnullableW3mag[2.34/3.84] WISE W3 (12um) band magnitude (1)magphot.flux.density;em.IR.8-15umfloatW4mag[-0.84/1.66] WISE W4 (22um) band magnitude (1)magphot.flux.density;em.IR.15-30umfloatW1mag2[7.7/9.47]? WISE W1 (3.4um) band magnitude (2)magphot.mag;em.IR.3-4umfloatnullableW2mag2[6.5/6.5]? WISE W2 (4.6um) band magnitude (2)magphot.mag;em.IR.4-8umfloatnullabledelW1[-0.35/1.17]? W1mag difference between Epoch 1 and Epoch 2magphot.mag;arith.difffloatnullabledelW2[-0.35/-0.35]? W2mag difference between Epoch 1 and Epoch 2magphot.mag;arith.difffloatnullableVarVariability type flag (3)meta.code;src.varcharColColor variability type as discussed in Section 3.1.2 (BB = bluer when brighter)meta.code;src.varcharLbol[545/45800] Bolometric luminosity from Lumsden+ 2013, J/ApJS/208/11solLumphys.luminositydoubleNpNumber of photometry measurements (link to fig2.dat)meta.numberintnullableLCInteractive Plotmeta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/ApJ/883/6/fig2Infrared light curves of variable sources in W1 and W2 bandsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMSX6CIdentifiermeta.id;meta.maincharMJD[55250.6/58461.8] Modified Julian Datedtime.epochdoubleW1mag[7.53/9.66]? WISE 3.4 micron band magnitudemagphot.mag;em.IR.3-4umfloatnullablee_W1mag[0.01/0.04] Uncertainty in W1magmagstat.error;phot.magfloatW2mag[6.27/7.28]? WISE 4.6 micron band magnitudemagphot.mag;em.IR.4-8umfloatnullablee_W2mag[0.006/0.11]? Uncertainty in W2magmagstat.error;phot.magfloatnullableJ/ApJ/883/6/fig2bAveraged Infrared light curves of variable sources in W1 and W2 bandsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMSX6CIdentifiermeta.id;meta.maincharMJD[55251.2/58460.9] Modified Julian Datedtime.epochdoubleW1mag[7.67/9.61] Averaged WISE 3.4um band magnitudemagphot.mag;em.IR.3-4umfloate_W1mag[0.009/0.2]? Uncertainty in W1magmagstat.error;phot.magfloatnullableo_W1mag[1/19]? Number of W1 magnitude used in W1mag (1)meta.numberfloatnullableW2mag[6.3/7.24]? Averaged WISE 4.6um band magnitudemagphot.mag;em.IR.4-8umfloatnullablee_W2mag[0.01/0.08]? Uncertainty in W2magmagstat.error;phot.magfloatnullableo_W2mag[0/19]? Number of W2 magnitude used in W2mag (1)meta.numberfloatnullable