J/A+A/402/963ivo://CDS.VizieR/J/A+A/402/963doi:10.26093/cds/vizier.34020963CDSMaheswar G.Manoj P.Bhatt H.C.2017-10-11T05:13:24Z2003-06-18T21:59:11ZCDS support team

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

cds-question@unistra.frpre-main-sequence-starsemission-line-starsccd-photometryinfrared-photometryWe present the results of spectroscopic observations for 52 objects from the list of H{alpha} emission stars of Stephenson (1986ApJ...300..779S). Out of six known T Tauri stars observed, five showed H{alpha} in emission and in one (StHa 40), H{alpha} changed from being in absorption to emission over a period of two years, accompanied by photometric and spectral type variability. We confirm the T Tauri nature of one Stephenson object (StHa 48) on the basis of the presence of H{alpha} and H{beta} in emission, Li I {lambda}6708 in absorption, infrared excess and X-ray emission. Among the 52 objects observed, there were other emission line objects: 1 Ke star, 1 BQ[] star, 2 galaxies and 2 Be stars. We present a higher-resolution spectrum of StHa 62 showing permitted and forbidden lines in emission typical of BQ[] stars. Twenty five out of 30 newly observed objects failed to show H{alpha} in emission. We also present 2MASS observations for 112 StHa objects. We suggest three Stephenson objects (StHa 52, 125 and 129) to be YSOs on the basis of 2MASS, IRAS and ROSAT observations. These and all other known YSOs amongst StHa stars are found in regions of star-forming clouds in Taurus, Orion and Ophiuchus. YSOs at high galactic latitudes in other parts of the sky are therefore rare.2003A&A...402..963Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/402/963CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/300/779 : High-latitude H-alpha emission stars (Stephenson+, 1986)V/73 : Emission-Line Stars of the Orion Population (Herbig+ 1988)V/110 : Catalog of Cataclysmic Variables (Downes+ 2001)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/402/963https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/402/963http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/402/963https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/402/963https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/402/963http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/402/963GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/402/963/table2 (2MASS, IRAS and ROSAT results of Stephenson stars object)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/402/963/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/402/963/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/402/963/table2?GETtext/xml+votable180.050000true15.76314436.5311010.0055555555555555566/246 267 557 599 881 1043 1050 1063 1075 1081 1170 2075 2440 2550 2554 2583 2885 3510 4293 4619 4856 5387 5779 6488 6556 6612 6704 6751 6770 7796 8155 8163 8375 8433 8473 8726 8732 9326 9475 9950 10028 10342 10653 10738 10927 11045 11180 11336 11391 11823 12146 12568 12887 12912 13091 13858 14541 14566 14578 14763 14865 14952 15032 15090 16121 16201 18255 18741 19145 19296 19694 20389 20476 21436 21480 21620 22498 22801 22805 22808 22833 22854 22862 22884 22893 22946 23549 23599 23889 24021 24198 24941 25297 25422 25954 27714 28131 28959 29419 29592 29783 29998 30048 30084-30085 30146 30741-30742 30892 30906 31613 31693 31792 32050 32149 32537 32546 32585 32603 36155 40852 40869 42981 42987 42994 44286 44317 44368 44402 48115 48361 48738 49087 49117 49139https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/402/963?format=asciiInfrareddefaultJ/A+A/402/963/refsReferencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference numbermeta.refintBibCodeBibCodemeta.bib.bibcodecharAutAuthor's namemeta.bib.authorcharComCommentsmeta.notecharJ/A+A/402/963/table22MASS, IRAS and ROSAT results of Stephenson stars objectrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStHaStHa number (Stepheson, 1986ApJ...300..779S)meta.id;meta.mainintr? Distance StHa star to the 2MASS detectionarcminpos.angDistancefloatnullableJmag? J magnitudemagphot.mag;em.IR.Jfloatnullablee_Jmag? rms uncertainty on Jmagmagstat.errorfloatnullableHmag? H magnitudemagphot.mag;em.IR.Hfloatnullablee_Hmag? rms uncertainty on Hmagmagstat.errorfloatnullableKsmag? Ks magnitudemagphot.mag;em.IR.Kfloatnullablee_Ksmag? rms uncertainty on Ksmagmagstat.errorfloatnullableJ-H? J-H colour indexmagphot.color;em.IR.J;em.IR.HfloatnullableH-Ks? H-Ks colour indexmagphot.color;em.IR.H;em.IR.KfloatnullableSpTypeSpectral Typesrc.spTypecharr_SpType? References for spectral type, in refs.dat filemeta.refintnullableDistIRAS? Radial distance of IRAS detectionarcminpos.angDistancefloatnullableDistROSAT? Radial distance of ROSAT detectionarcminpos.angDistancefloatnullableClassClass of objectsrc.classcharn_Class[*+d ] Note on Class (1)meta.notecharr_Class? Reference for Class, in refs.dat filemeta.refintnullableSimbadSimbad column added by the CDSmeta.refchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main