J/AJ/143/3ivo://CDS.VizieR/J/AJ/143/3doi:10.26093/cds/vizier.51430003CDSDahm S.E.Herbig G.H.Bowler B.P.2018-01-05T08:57:02Z2013-04-05T13:51:48ZCDS support team

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

cds-question@unistra.frinfrared-photometryvisible-astronomybroad-band-photometryemission-line-starsline-intensitiesh-alpha-photometrystellar-associationsIC 1274 is a faintly luminous nebula lying on the near surface of the Lynds 227 (L227) molecular cloud. Its cavity-like morphology is reminiscent of a blistered star-forming region. Four luminous, early-type (B0-B5) stars are located within a spherical volume ~5' in diameter that appears to be clear of heavy obscuration. Approximately centered in the cleared region is the B0 V star HD 166033, which is thought to be largely responsible for the cavity's excavation. Over 80 H{alpha} emission sources brighter than V~21 have been identified in the region. More than half of these are concentrated in IC 1274 and are presumably members of a faint T Tauri star population. Chandra Advanced CCD Imaging Spectrometer imaging of a nearby suspected pulsar and time-variable {gamma}-ray source (GeV J1809-2327) detected 21 X-ray sources in the cluster vicinity, some of which are coincident with the early-type stars and H{alpha} emitters in IC 1274. Deep (V~22) optical BVRI photometry has been obtained for the cluster region. A distance of 1.82+/-0.3kpc and a mean extinction of AV~1.21+/-0.2mag follow from photometry of the early-type stars. Using pre-main-sequence evolutionary models, we derive a median age for the H{alpha} emitters and X-ray sources of ~1Myr; however, a significant dispersion is present. The displaced material was driven against what remains of the molecular cloud to the east, enabling the formation of the substantial number of T Tauri stars found there. A dispersed population of H{alpha} emitters is also found along the periphery of L227, IC 1275, and IC 4684.2012AJ....143....3Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/143/3CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/281 : 2MASS 6X Point Source Working Database / Catalog (Cutri+ 2006)J/ApJ/497/736 : The young cluster IC 348. (Herbig, 1998)J/AJ/123/304 : BV(RI)CJHK H{alpha} photometry in IC 5146 (Herbig+, 2002)J/AJ/128/1233 : LkH{alpha}101 and the young cluster in NGC 1579 (Herbig+, 2004)J/AJ/129/829 : H{alpha} emission stars in NGC 2264 (Dahm+, 2005)J/AJ/130/1805 : H{alpha} emission stars in NGC 2362 (Dahm+, 2005)J/AJ/131/1530 : H{alpha} emission stars in LDN988 (Herbig+, 2006)J/AJ/143/03 : H{alpha} emission stars in IC 1274 (Dahm+, 2012)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/143/3https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/143/3http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/143/3https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/143/3https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/143/3http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/143/3GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/143/3/table3 (H{alpha} emission stars in the IC 1274 region)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/143/3/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/143/3/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/143/3/table3?GETtext/xml+votable180.050000true272.2299167-23.78483330.0055555555555555566/28892 288947.952274030004205e-20 1.0188844282367877e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/143/3?format=asciiOpticalInfrareddefaultJ/AJ/143/3/table3H{alpha} emission stars in the IC 1274 regionSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMSimbad column added by the CDSmeta.ref.urlcharIHa[686/762]? IH{alpha} number (1)meta.id;meta.mainintnullableprimaryRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainVmag[11.81/21.06]? The V band magnitude (2)magphot.mag;em.opt.Vfloatnullablef_VmagLiterature V magnitude (3)meta.codecharV-R[0.52/1.79]? The (V-R) color (2)magphot.color;em.opt.V;em.opt.RfloatnullableV-I[1.47/3.66]? The (V-I) color (2)magphot.color;em.opt.V;em.opt.IfloatnullableJ-H[0.17/1.75]? The (J-H) color (4)magphot.color;em.IR.J;em.IR.HfloatnullableH-Ks[0.12/1.08]? The (H-Ks) color (4)magphot.color;em.IR.H;em.IR.KfloatnullableKsmag[8.152/13.56]? The Ks band magnitude (4)magphot.mag;em.IR.KfloatnullableW(Ha)1[-86/-2]? H{alpha} equivalent width (1990 survey) (5)0.1nmspect.line.eqWidth;em.line.Halphaintnullableu_W(Ha)1[:/EM/ND/ ] Uncertainty flag on W(Ha)1 (6)meta.code.errorcharW(Ha)2[-189/-2]? H{alpha} equivalent width (2003 survey) (5)0.1nmspect.line.eqWidth;em.line.Halphaintnullableu_W(Ha)2[:/EM/ND/ ] Uncertainty flag on W(Ha)2 (6)meta.code.errorcharW(Ha)3[-328/-2]? H{alpha} equivalent width (2009 survey) (5)0.1nmspect.line.eqWidth;em.line.Halphaintnullableu_W(Ha)3[:/EM/EM?/ND/ ] Uncertainty flag on W(Ha)3 (6)meta.code.errorcharNoteCommentsmeta.notecharJ/AJ/143/3/table5Derived properties of the H{alpha} emission stars in the IC 1274 regionrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIHa[695/757] IHa number (IfAHA NNN in Simbad) (1)meta.id;meta.mainintSpTSpectral type (1)src.spTypecharL[0.31/9.65] Luminosity (1)solLumphys.luminosityfloatR[1.2/5.59] Radius (1)solRadphys.size.radiusfloatTeff[2985/4986] Effective temperature (1)Kphys.temperature.effectiveintM[0.19/1.55] Mass (1)solMassphys.massfloatAge[4.58/6.84] log (Age) (1)log(yr)arith.zpfloat