J/A+A/441/653ivo://CDS.VizieR/J/A+A/441/653doi:10.26093/cds/vizier.34410653CDSCrifo F.Phan-Bao N.Delfosse X.Forveille T.Guibert J.Martin E.L.,Reyle C.2017-06-30T05:48:43Z2006-05-04T22:38:31ZCDS support team

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

cds-question@unistra.frdwarf-starsinfrared-photometrymorgan-keenan-classificationstellar-distanceWe present spectra of 36 nearby star candidates and 3 red giant candidates, identified in the DENIS database. 32 of the dwarf candidates are nearby red dwarfs, with spectral types from M5.5 to M8.5. Out of 11 targets with low proper motion (mu<0.1arcsec/yr) but a Reduced Proper Motion above an inclusive threshold, 9 are red dwarfs. The 4 contaminants are all reddened F-K main sequence stars, and could have been eliminated by checking for small well-known high latitude molecular clouds. These stars might be of interest as probes of interstellar absorption. For the red dwarfs we derive spectral types and spectroscopic distances, using a new calibration of the PC3 spectral index to absolute magnitudes in the I, J, H and K photometric bands. We confirm 2 new members of the 12 pc volume (2 new M8.5), and one M7.5 NLTT object closer than 10pc; and show that one quarter of the stars with photometric distances under 30pc have too small a proper motion for inclusion in the NLTT catalog.2005A&A...441..653Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/441/653CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/denis : The DENIS database (Epchtein+, 1999)I/98 : NLTT Catalogue (Luyten, 1979)I/87 : LHS Catalogue, 2nd Edition (Luyten 1979)V/70 : Nearby Stars, Preliminary 3rd Version (Gliese+ 1991)J/A+AS/105/179 : New proper-motion stars Dec<-40, 16<RA<24h (Wroblewski+ 1994)J/A+A/380/590 : 30 DENIS late-M dwarfs between 15 and 30pc (Phan-Bao+, 2001)J/A+A/401/959 : 35 DENIS late-M dwarfs between 10 and 30pc (Phan-Bao+, 2003)J/A+A/446/515 : Distances of nearby ultracool dwarfs (Phan-Bao+, 2006)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/441/653https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/441/653http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/441/653https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/441/653https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/441/653http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/441/653GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/441/653/stars (Spectral indices, spectral types and spectroscopic distance)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/441/653/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/441/653/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/441/653/stars?GETtext/xml+votable180.050000true1.239583-17.1602780.0055555555555555566/16405 16568 16971 17156 17283 17366 18083 18571 22739 23144 24824 24887 25034 26699 30903 33470 34219 34301 35864 40313 40373 44306 44318 44881 45175 45513 45963 46739 48025 48158 48462 48735https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/441/653?format=asciiOpticalInfrareddefaultJ/A+A/441/653/starsSpectral indices, spectral types and spectroscopic distancerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDENISThe DENIS namemeta.id;meta.maincharprimaryOName? Other name (1)meta.idcharPC3The PC3 spectral index (2)spect.indexfloatTiO5The TiO5 spectral index (3)spect.indexfloatu_TiO5[:] Unreliable valuemeta.code.errorcharCaH2The CaH2 spectral index (3)spect.indexfloatu_CaH2[:] Unreliable valuemeta.code.errorcharCaH3The CaH3 spectral index (3)spect.indexfloatu_CaH3[:] Unreliable valuemeta.code.errorcharVO1The VO1 spectral index (4)spect.indexfloatVO2The VO2 spectral index (5)spect.indexfloatTiO6The TiO6 spectral index (5)spect.indexfloatTiO7The TiO7 spectral index (5)spect.indexfloatSptPC3Spectral type derived from the PC3 index (6)src.spTypecharSptTiO5Spectral type derived from the TiO5 index (7)src.spTypecharu_SptTiO5[:] Unreliable valuemeta.code.errorcharPr[ABb] Priority code (8)meta.codecharn_DENIS[a] Note (1)meta.notecharImagDENIS I-band magnitudemagphot.mag;em.opt.IfloatI-JDENIS I-J colour indexmagphot.color;em.IR;em.IRfloatJ-KDENIS J-K colour indexmagphot.color;em.IR.J;em.IR.KfloatIMAGI-JAbsolute I-band magnitude from I-J colour (3)magphys.magAbs;em.opt.IfloatIMAGPC3Absolute I-band magnitude from PC3 index (4)magphys.magAbs;em.opt.IfloatJMAGPC3Absolute J-band magnitude from PC3 index (4)magphys.magAbs;em.IR.JfloatKMAGPC3Absolute K-band magnitude from PC3 index (4)magphys.magAbs;em.IR.KfloatDistAdopted distance based on Dist(I), Dist(J) and Dist(K)pcpos.distance;pos.heliocentricfloatDist(I)Estimated distance from IMAGPC3pcpos.distance;pos.heliocentricfloatDist(J)Estimated distance from JMAGPC3pcpos.distance;pos.heliocentricfloatDist(K)Estimated distance from KMAGPC3pcpos.distance;pos.heliocentricfloatDist(I-J)Distance derived from the I-J colourpcpos.distance;pos.heliocentricfloatSpTypeAdopted MK spectral typesrc.spTypechar_RARight ascension (derived from DENIS) for Eq=J2000degpos.eq.ra;meta.main_DEDeclination (derived from DENIS) for Eq=J2000degpos.eq.dec;meta.main