J/ApJ/884/84ivo://CDS.VizieR/J/ApJ/884/84doi:10.26093/cds/vizier/ba-vm-2mCDSDewangan L.K.2026-07-02T11:58:03Z2023-10-27T12:44:33ZCDS support team

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

cds-question@unistra.fryoung-stellar-objectsinfrared-photometrystar-forming-regionsWe observationally investigate star formation process occurring in AFGL 5157 (area ~13.5pcx13.5pc) using a multi-wavelength approach. Embedded filaments are seen in the Herschel column density map, and one of them is identified as an elongated filamentary feature (FF) (length ~8.3pc; mass ~1170M_{sun}_). Five Herschel clumps (M_clump_~45-300M_{sun}_) are traced in the central part of the FF, where an extended temperature structure (T_d_~13.5-26.5K) is observed. In the direction of the central part of the FF, the warmer region at T_d_~20-26.5K spatially coincides with a mid-infrared shell surrounding a previously known evolved infrared cluster. Diffuse H{alpha} emission is traced inside the infrared shell, suggesting the presence of massive stars in the evolved cluster. Based on the surface density analysis of young stellar objects (YSOs), embedded clusters of YSOs are traced toward the central part of the FF, and are distributed around the infrared shell. Previously detected H_2_O masers, H_2_ knots, massive protostar candidates, and an H II region are also seen toward the embedded clusters. Using the ^12^CO and ^13^CO line data, the central part of the FF is observed at the overlapping zones of two filamentary molecular clouds (length ~12.5pc) around -20 and -17km/s, which are also connected in velocity. Our observational results suggest that the formation of massive stars appears to be triggered by a collision of two filamentary molecular clouds, which might have also influenced the birth of YSOs in AFGL 5157.2019ApJ...884...84Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/884/84CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)II/293 : GLIMPSE Source Catalog (I + II + 3D) (IPAC 2008)II/319 : UKIDSS-DR9 LAS, GCS and DXS Surveys (Lawrence+ 2012)J/ApJ/428/693 : Rosette Nebula and Maddalena Cloud structures (Williams+ 1994)J/AJ/117/446 : AFGL 5157 near-IR imaging (Chen+, 1999)J/ApJS/161/361 : Millimeter continuum survey for protoclusters (Klein+, 2005)J/AJ/131/1574 : Infrared photometry of IC348 members (Lada+, 2006)J/ApJ/649/759 : Bubbles in the galactic disk (Churchwell+, 2006)J/ApJS/175/277 : Submillimeter-Continuum SCUBA detections (Di Francesco+, 2008)J/ApJS/181/321 : Properties of Spitzer c2d dark clouds (Evans+, 2009)J/ApJS/184/18 : Spitzer survey of young stellar clusters (Gutermuth+, 2009)J/MNRAS/404/661 : Young stellar outflows near-IR imaging (Varricatt+ 2010)J/ApJ/844/38 : MHOs toward 22 regions with H2 fluxes (Wolf-Chase+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/884/84https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/884/84http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/884/84https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/884/84https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/884/84http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/884/84GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/884/84/table3 (Near-infrared and Spitzer IRAC/GLIMPSE photometric magnitudes of selected YSOs)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/884/84/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/884/84/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/884/84/table3?GETtext/xml+votable180.050000true84.4377631.870990.0055555555555555566/244992.0616683193919197e-20 6.185923063528282e-20https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/884/84?format=asciiInfrareddefaultJ/ApJ/884/84/table3Near-infrared and Spitzer IRAC/GLIMPSE photometric magnitudes of selected YSOsSeq[1/167] Running sequence number (<[D2019b] YSO NNN> in Simbad)meta.id;meta.mainint_RA.icrsRight ascension (ICRS) (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) (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.recordintGLON[176.26/176.7] Galactic longitudedegpos.galactic.lonGLAT[0.02/0.5] Galactic latitudedegpos.galactic.latJmag[10.88/20.41]? J-band magnitudemagphot.mag;em.IR.JfloatnullableHmag[8.7/18.7]? H-band magnitudemagphot.mag;em.IR.HfloatnullableKmag[7.27/17.6]? K band magnitudemagphot.mag;em.IR.Kfloatnullable3.6mag[8.86/17]? Spitzer/IRAC 3.6um band magnitudemagphot.mag;em.IR.3-4umfloatnullable4.5mag[8.36/15.3]? Spitzer/IRAC 4.5um band magnitudemagphot.mag;em.IR.4-8umfloatnullable5.8mag[9/14.8]? Spitzer/IRAC 5.8um band magnitudemagphot.flux.density;em.IR.4-8umfloatnullable8.0mag[8.3/14.1]? Spitzer/IRAC 8um band magnitudemagphot.flux.density;em.IR.8-15umfloatnullableClassYSO class ("II", 156 occurrences or "I", 11 occurrences)src.classchar2MDisplay the 2MASS data (II/246) within 2.1"meta.ref.urlintnullable