J/ApJ/541/841ivo://CDS.VizieR/J/ApJ/541/841doi:10.26093/cds/vizier.15410841CDSAbt H.A.Corbally C.J.2018-02-02T10:34:12Z2005-08-18T22:25:55ZCDS support team

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

cds-question@unistra.frmultiple-starsvisible-astronomybroad-band-photometryinterstellar-reddeningstellar-distanceWe sought to determine the maximum age of Trapezium systems by studying possible trapezium systems that were selected independently of their occurrence in H II regions. We started with the unpublished catalog by Allen, Tapia & Parrao (1977RMxAA...3..119A) of all the known visual systems having three or more stars in which the maximum separation is less than 3.0 times the minimum separation. Their catalog has 968 such systems whose most frequent primary type is F, which does not describe young systems. With a CCD on the Kitt Peak 0.9m telescope we obtained UBV frames for 265 systems accessible with our equipment on Kitt Peak. The frames were used to obtain UBV photometry for about 1500 stars with an accuracy of 0.04mag between V=7 and 14mag. Also these frames were used to obtain astrometry with an accuracy of +/-0.015{deg} in position angle and +/-0.01" in separation. For the brightest star in each system we obtained a spectral type to determine the distance and reddening to the system.2000ApJ...541..841Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/541/841CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/134 : Trapezium Multiple Systems (Salukvadze, 1978)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/541/841https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/541/841http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/541/841https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/541/841https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/541/841http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/541/841GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/541/841/table3a (Conclusions about the Possible Trapezium Systems)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/541/841/table3a?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/541/841/table3a?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/541/841/table3a?GETtext/xml+votable180.050000true2.801144.32310.005555555555555556Cone search capability for table J/ApJ/541/841/trap (*Accurate positions and remarks, by B. Skiff)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/541/841/trap?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/541/841/trap?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/541/841/trap?GETtext/xml+votable180.050000true2.798041744.31586110.0055555555555555566/1013 1086 1225 1287 1291 1292 1302 1325 1335 1533 1586 1723 1760 1935 2096 2107 2378 2379 2409 2419 2438 2499 2522 2525 2563 2745 2871 3011 3048 3058 3226 3231 3283 3300 3303 3647 3649 3716 3877 3894 4434 4456 4790 4931 5025 5716 5892 6010 6170 6175 6333 6343 6611 6669 6692 6731 6754 6801 6898 7026 7043 7102 7108 7330 7796 7841 8158 8243 8404 8490 8724 9318 9556 10095 10231 10831 11151 11242 11329 11560 11607 11721 11951 11956 12610 12745 12796 12813 12848 12852 12942 12992 13149 13266 13271 13322 13453 13560 13616 13629 13644 13670 13676 13785 13787 13818 13855 13904 13966 13972 13989 14036 14046 14056 14078 14126 14169 14188 14254 14255 14311 14324 14391 14397 14429 14441 14457 14512 14535 14573 14587 14627 14630 14631 14643 14834 14882 14913 14958 15037 15097 15121 15161 15214 15242 15340 15383 15435 15442 15449 15453 15477 15498 15616 15775 15777 15838 17166 17802 18366 18402 18493 18576 18907 19105 19341 19362 19884 20323 20407 20708 20725 20732 20836 20893 21043 21274 21408 21610 21682 21694 21707 21776 21790 21860 21922 22123 22129 22202 22252 22459 22526 22601 22670 22692 22758 23410 23631 23632 23637 23677 23757 23769 23794 23824 23905 23972 23987 23998 24396 24477 26051 26279 26357 26464 26525 27274 27573 27662 27904 27940 28455 28892 28893 28918 29021 29044 29359 29394 29456 29532 29630 29674 29783 29923 29980 30125 30152 30209 30212 30464 30515 30526 30549 31162 31590 32016 32061 32516 32577 34784 35809 36034 36494 36725 39899 39916 39919 39922 40509 40890 42845 42969 43887 488323.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/541/841?format=asciiOpticaldefaultJ/ApJ/541/841/table3aConclusions about the Possible Trapezium SystemsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintn_Trap[*] indicates corrections made at CDS (see the "History" section below)meta.notecharTrapTrapezium system number ([AC2000b] Trap NNN)meta.id;meta.mainintprimaryRA1900Right Ascension (1900)pos.eq.ra;meta.mainDE1900Declination (1900)pos.eq.dec;meta.mainONameOther name (ADS ... = no ADS name)meta.idcharu_OName[?] For Trap 237, the HD identification doesn't match the positionmeta.code.errorcharConclConclusions about the groupmeta.note;pos.lgcharE(B-V)? Reddeningmagphot.color.excessfloatnullablef_E(B-V)[:?A] Flag on E(B-V) (1)meta.codecharDMod? Distance modulusmagphot.mag.distModfloatnullablef_DMod[?A] Flag on DMod (1)meta.codechar_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)pos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)pos.eq.decnullableindexedJ/ApJ/541/841/table3bObservational DatarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTrapTrapezium system number ([AC2000b] Trap NNN)meta.id;meta.mainintID1Identification number for Figure 1meta.idintID2Identification letter from other sourcesmeta.idcharVmag? V band magnitudesmagphot.mag;em.opt.VfloatnullableB-V? B-V colormagphot.color;em.opt.B;em.opt.VfloatnullableU-B? U-B colormagphot.color;em.opt.U;em.opt.BfloatnullableMKClassMK classificationmeta.code.class;src.classchardate0Date of earlier astrometric measurementsyrtime.epochintdate1? If present, indicates measurements obtained from date0 to date1yrtime.epochintnullablen_sep0? Star pair that sep0 and pa0 refermeta.notecharsep0? Old angular separation relative to the first stararcsecpos.angDistance;src.orbitalfloatnullablef_sep0[v:] Flag on sep0 (1)meta.codecharpa0? Previous position angle relative to the first stardegpos.posAngfloatnullablef_pa0[v orb] Flag on OPA (1)meta.codecharDateDate of observations from this workyrtime.epochdoublen_sep? Star pair that sep and PA refermeta.notecharsep? This work's angular separation relative to the first stararcsecpos.angDistance;src.orbitalfloatnullablePA? This work's position angle relative to the first stardegpos.posAngfloatnullableConclConclusions about the physical association of each componentmeta.id.assoccharJ/ApJ/541/841/trap*Accurate positions and remarks, by B. SkiffDEJ2000Declination J2000pos.eq.dec;meta.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTrapTrapezium system number ([AC2000b] Trap NNN)meta.id;meta.mainintRA1900Right Ascension (1900)pos.eq.raDE1900Declination (1900)pos.eq.decNameName of the system (ADS ... = no ADS name)meta.idcharONameOther designationmeta.idcharRAJ2000Right Ascension J2000pos.eq.ra;meta.mains[MTU] Source of position (1)meta.ref;pos.framecharVmagVisual magnitudemagphot.mag;em.opt.VfloatSpTypeMK Spectral classificationsrc.spTypecharRemarksRemarks, from B. Skiffmeta.notechar