J/AJ/131/2959ivo://CDS.VizieR/J/AJ/131/2959doi:10.26093/cds/vizier.51312959CDSMcGehee P.M.2008-11-18T05:06:01Z2008-11-18T06:02:05ZCDS support team

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

cds-question@unistra.frstellar-associationspre-main-sequence-starslate-type-starsvisible-astronomysloan-photometryThe stellar group surrounding the Be (B1Vpe) star 25 Ori was discovered to be a pre-main-sequence (PMS) population by the CIDA Variability Survey of Orion (Cat. J/AJ/129/907) and subsequent spectroscopy. We analyze Sloan Digital Sky Survey multiepoch photometry to map the southern extent of the 25 Ori group and characterize its PMS population. We compare this group to the neighboring Orion OB1a and OB1b subassociations and to active star formation sites (NGC 2068/NGC 2071) within the LDN 1630 dark cloud. We find that the 25 Ori group has a radius of 1.4{deg}, corresponding to 8-11pc at the distances of Orion OB1a and OB1b.2006AJ....131.2959Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/131/2959CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/129/907 : New Ori OB1 members (Briceno+, 2005)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/131/2959https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/131/2959http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/131/2959https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/131/2959https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/131/2959http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/131/2959GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/131/2959/table2 (Candidate low-mass PMS in the Orion equatorial region)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/131/2959/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/131/2959/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/131/2959/table2?GETtext/xml+votable180.050000true75.05621.23030.0055555555555555565/5717 5718 5721 5722 5724 5733 6/21502 21503 22845 22846 22847 22861 22862 22863 22865 22866 22867 22876 22877 22878 22881 22882 22883 22892 22893 22894 22929 22931 22937 22940 22941 22942 22976 22977 22978 23552 235542.040811542443644e-19 4.653515163505597e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/131/2959?format=asciiOpticaldefaultJ/AJ/131/2959/table2Candidate low-mass PMS in the Orion equatorial regionrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSDSSSource name ([M2006] SDSS JHHMMSS.ss+DDMMSS.s in Simbad) from SDSS low Galactic latitude (see Finkbeiner et al., 2004AJ....128.2577F)meta.id;meta.maincharRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.maingmagSDSS g band magnitudemagphot.mag;em.opt.BfloatrmagSDSS r band magnitudemagphot.mag;em.opt.RfloatimagSDSS i band magnitudemagphot.mag;em.opt.IfloatzmagSDSS z band magnitudemagphot.mag;em.opt.IfloatRDistance from the Be star 25 Oridegpos.angDistancefloatTTS[CW] Weak-lined (W) or Classical (C) T Tauris (1)src.classchar