J/ApJS/214/17ivo://CDS.VizieR/J/ApJS/214/17doi:10.26093/cds/vizier.22140017CDSJanson M.Bergfors C.Brandner W.Bonnefoy M.Schlieder J.Kohler R.,Hormuth F.Henning T.Hippler S.2017-09-27T05:55:27Z2014-10-22T12:15:02ZCDS support team

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

cds-question@unistra.frproper-motionsm-starsmultiple-starsOrbital monitoring of M-type binaries is essential for constraining their fundamental properties. This is particularly useful in young systems, where the extended pre-main-sequence evolution can allow for precise isochronal dating. Here, we present the continued astrometric monitoring of the more than 200 binaries of the AstraLux Large Multiplicity Survey, building both on our previous work, archival data, and new astrometric data spanning the range of 2010-2012. The sample is very young overall --all included stars have known X-ray emission, and a significant fraction (18%) of them have recently also been identified as members of young moving groups in the solar neighborhood. We identify ~30 targets that both have indications of being young and for which an orbit either has been closed or appears possible to close in a reasonable time frame (a few years to a few decades). One of these cases, GJ 4326, is, however, identified as probably being substantially older than has been implied from its apparent moving group membership, based on astrometric and isochronal arguments. With further astrometric monitoring, these targets will provide a set of empirical isochrones, against which theoretical isochrones can be calibrated, and which can be used to evaluate the precise ages of nearby young moving groups.2014ApJS..214...17Jhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/214/17CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/wds : The Washington Visual Double Star Catalog (Mason+ 2001-2014)V/139 : The SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012)I/317 : The PPMXL Catalog (Roeser+ 2010)VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)I/297 : NOMAD Catalog (Zacharias+ 2005)I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)J/ApJ/754/44 : The AstraLux Large M-dwarf Survey (Janson+ 2012)J/AJ/144/64 : Solar neighborhood. XXVIII. companions (Dieterich+, 2012)J/AJ/143/80 : Low-mass stars of beta Pic & AB Dor groups (Schlieder+, 2012)J/ApJ/731/8 : Multiple star formation in Taurus-Auriga (Kraus+, 2011)J/AJ/139/2566 : SLoWPoKES catalog (Dhital+, 2010)J/A+A/509/A52 : Search for companions with VLT/NACO (Chauvin+, 2010)J/ApJS/190/1 : A survey of stellar families (Raghavan+, 2010)J/AJ/132/866 : New M dwarfs in solar neighborhood (Riaz+, 2006)J/ApJS/161/394 : Low-luminosity companions to white dwarfs (Farihi+, 2005)J/AJ/130/1680 : LSPM-North proper-motion catalog nearby stars (Lepine+, 2005)J/A+A/422/1023 : Nearby visual double stars UBVRI phot. (Strigachev+, 2004)J/AJ/124/3255 : UBV photometry in M15 (van der Marel+, 2002)J/AJ/123/1023 : Binary star orbits (Seymour+, 2002)J/A+A/396/933 : Double star measurements at Nice Obs. (Morlet+, 2002)J/A+A/364/665 : Very low mass stars radial velocities (Segransan+, 2000)J/A+A/337/403 : Low-mass stars evolutionary models (Baraffe+ 1998)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/214/17https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/214/17http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/214/17https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/214/17https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/214/17http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/214/17GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/214/17/pairs (*List of the 218 stellar pairs of this study, plus the 6 pairs present only in table2)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/214/17/pairs?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/214/17/pairs?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/214/17/pairs?GETtext/xml+votable180.050000true1.6635417-7.09316670.0055555555555555566/225 265 551 608 850 2198 2354 2442 2660 2671 2756 2830 3570 4764 4869 5819 6384 6497 6582 6873 6930 7528 7874 7900 8383 8601 8775 9117 9311 9429 9638 9747 9768 9784 9839 9917 10037 10131 10356 10414 10416 10420 10612 10747 10851 10855 11083 11569 11573 11787 11853 11910 11963 11982 12111 12486 12553 13182 13512 14490 14935 15091 15896 16719 17155 17349 17394 17400 17509 17588 17590 17607 17645 17797 17964 18538 18588 18599 18977 19077 19451 19691 19777 19931 20000 20064 20074 20110 20262 20384 20540 20617 20701 20833 20854 21031 21202 21277 21306 21364 21407 21420 21422 21438 22162 22773 22788 22805 22830 22845 22856 23111 23534 25374 25440 26181 26834 26851 27207 27611 27937 28589 29866 29921 29958 30237 30833 30992 31400 32367 32414 32700 32732 33055 33075 33320 33618 33669 33882 33901 34736 34739 35121 35131 35154 35245 35447 35517 35640 35847 36012 36045 36401 36466 36543 36755 36778 36809 36969 36978 37309 37387 37418 37560 37734 37765 37769 37848 37856 38199 38347 38359 38400 38687 38742 38840 39008 39723 39829 39906 40084 40148 40225 40702 40748 40887 41568 43011 43163 43208 43571 45035 45419 46308 47889 48325 48648 48954 49006 49146https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/214/17?format=asciiOpticaldefaultJ/ApJS/214/17/pairs*List of the 218 stellar pairs of this study, plus the 6 pairs present only in table2OSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint2MASS2MASS designation (JHHMMSSss+DDMMSSs, II/246; or JHHMMSSs+DDMMSS for 2MASSI, II/241)meta.id;meta.maincharprimaryCompComponents of the system (AB, AC, etc)meta.code.multipcharDist[5/385]? Distance of the system (1)pcpos.distance;pos.heliocentricintnullablepmRA[-791/834]? Proper motion along RA (1)mas/yrpos.pm;pos.eq.rafloatnullablepmDE[-878/388]? Proper motion along Dec (1)mas/yrpos.pm;pos.eq.decfloatnullableCPM[YN/U ] common proper motion (CPM)? (U=unclear)meta.codecharOM[YNU ] Significant orbital motion (OM)? (1)meta.codecharJ12Display the data from AstraLux (Janson+, 2012, J/ApJ/754/44) within 10"meta.ref.urlintnullableNepNumber of observations in table1meta.numberintnullable2MDisplay the 2MASS data (Cutri et al. 2003, Cat. II/246) within 10"meta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPositions from SIMBAD database (from 2MASS names) (right ascension part)degpos.eq.ra;meta.main_DEPositions from SIMBAD database (from 2MASS names) (declination part)degpos.eq.dec;meta.mainJ/ApJS/214/17/table1Relative astrometry of all stellar pairs of this studyOSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint2MASS2MASS designation (JHHMMSSss+DDMMSSs, II/246; or JHHMMSSs+DDMMSS for 2MASSI, II/241)meta.id;meta.maincharCompComponents of the system (AB, AC, etc)meta.code.multipcharSep[0.05/9.4] Separation between components {rho}arcsecpos.angDistancefloate_Sep[0.001/3]? Sep uncertaintyarcsecstat.errorfloatnullablePAPosition angle {theta}degpos.posAngfloate_PA[0/8]? PA uncertaintydegstat.errorfloatnullableEpoch[1955/2012.9] Epoch of observationyrtime.epochfloatAuthAuthor's reference (1)meta.bib.authorcharBibCodeBibcode's reference (1)meta.bib.bibcodecharJ/ApJS/214/17/table2Assessments of orbital motion in systems with P_est_<50yrrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint2MASS2MASS designation (JHHMMSSss+DDMMSSs, II/246; or JHHMMSSs+DDMMSS for 2MASSI, II/241)meta.id;meta.maincharCompComponents of the system (AB, AC, etc)meta.code.multipcharNep[1/12] Number of epochs of observation for the targetmeta.numberintPer[2/48] Estimated period (P_est_) (1)yrtime.periodintMotionQualitative assessment of the orbital period from astrometric motion (2)meta.notecharCommComments (3)meta.notechar