J/A+A/519/A83ivo://CDS.VizieR/J/A+A/519/A83doi:10.26093/cds/vizier.35190083CDSTakita S.Kataza H.Kitamura Y.Ishihara D.Ita Y.Oyabu S.Ueno M.2017-06-19T07:57:17Z2010-09-16T07:57:51ZCDS support team

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

cds-question@unistra.frinfrared-sourceslate-type-starspre-main-sequence-starsWe search for new T Tauri star (TTS) candidates with the mid-infrared (MIR) part of the AKARI All-Sky Survey at 9 and 18{mu}m wavelengths. We used the point source catalogue (PSC) obtained by the Infrared Camera (IRC) on board AKARI. We combined the 2MASS PSC and the 3rd version of the USNO CCD Astrograph Catalogue (UCAC) with the AKARI IRC-PSC, and surveyed 517 known TTSs over a 1800-square-degree part of the Taurus-Auriga region to develop criteria to extract TTSs. We considered asymptotic giant branch (AGB) stars, post-AGB stars, planetary nebulae (PNe), and galaxies, which have similar MIR colours, to separate TTSs from these sources. We finally searched for new TTS candidates from AKARI IRC-PSC in the same Taurus-Auriga region. Of the 517 known TTSs, we detected 133 sources with AKARI: 46 sources were not detected by IRAS. Based on the colour-colour and colour-magnitude diagrams made from the AKARI, 2MASS, and UCAC surveys, we propose the criteria to extract TTS candidates from the AKARI All-Sky data, and 68/133 AKARI detected TTSs have passed these criteria. On the basis of our criteria, we selected 176/14725 AKARI sources as TTS candidates that are located around the Taurus-Auriga region. Comparing these sources with SIMBAD, we found that 148 are previously identified sources including 115 young stellar objects (YSOs), and 28 unidentified sources. Based on SIMBAD identifications, we infer the TTS-identification probability using our criteria to be ~75%. We find 28 TTS candidates, of which we expect ~21 to be confirmed once follow-up observations can be obtained. Although the probability of ~75% is not so high, it is affected by the completeness of the SIMBAD database, and we can search for TTSs over the whole sky, and all star-forming regions.2010A&A...519A..83Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/519/A83CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/297 : AKARI/IRC mid-IR all-sky Survey (ISAS/JAXA, 2010)II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)I/315 : UCAC3 Catalogue (Zacharias+ 2009)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/519/A83https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/519/A83http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/519/A83https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/519/A83https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/519/A83http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/519/A83GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/519/A83/tts (AKARI, UCAC, and 2MASS photometric parameters of known and new T Tauri stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/519/A83/tts?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/519/A83/tts?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/519/A83/tts?GETtext/xml+votable180.050000true47.807522.4158330.0055555555555555565/270 292 6/124 342 447 784 833 880-881 1029 1031 1036-1037 1039-1040 1048 1050-1054 1061 1063 1068 1073-1075 1084 1109 1111 1114-1115 1123-1124 1136 1140 1152 1154 1156 1159 1176 1240 1242 1253 1299 1347 1546 1560 22992 23003 23007 23027 23030 23397 23446 23457 23477 23548-23549 23551 23695 23731 23738 23743 24169 24190 24201 24203 24205 24217 24274 24276 24300 24306 244848.650015785639275e-20 3.4272990383579255e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/519/A83?format=asciiInfrareddefaultJ/A+A/519/A83/ttsAKARI, UCAC, and 2MASS photometric parameters of known and new T Tauri starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintn_AKARISimbad column added by the CDSmeta.notecharAKARIAKARI source name (HHMMSSs+DDMMSS) (1)meta.id;meta.maincharNameCommon name (for known T Tau stars only) (3)meta.idcharS9W? S9W magnitude in AKARI-vega system (2)magphot.flux.density;em.IR.8-15umfloatnullablee_S9W? Error in S9W magnitude in AKARI-vega systemmagstat.errorfloatnullableL18W? L18W magnitude in AKARI-vega system (3)magphot.flux.density;em.IR.8-15umfloatnullablee_L18W? Error in L18W magnitude in AKARI-vega systemmagstat.errorfloatnullableUCmag? UCAC3 magnitude (4)magphot.mag;em.optfloatnullablee_UCmag? Error in UCAC magnitudemagstat.error;phot.magfloatnullableJmag? 2MASS J magnitudemagphot.mag;em.IR.Jfloatnullablee_Jmag? Error in 2MASS J magnitudemagstat.error;phot.mag;em.IR.JfloatnullableHmag? 2MASS H magnitudemagphot.mag;em.IR.Hfloatnullablee_Hmag? Error in 2MASS H magnitudemagstat.error;phot.mag;em.IR.HfloatnullableKmag? 2MASS Ks magnitudemagphot.mag;em.IR.Kfloatnullablee_Kmag? Error in 2MASS K magnitudemagstat.error;phot.mag;em.IR.KfloatnullableUCACDetails from UCAC cataloguesmeta.ref.urlchar2MDetails from 2MASS catalogmeta.ref.urlcharSimbadSimbad column added by the CDSmeta.refchar_RAPosition from AKARI name (right ascension part)degpos.eq.ra;meta.main_DEPosition from AKARI name (declination part)degpos.eq.dec;meta.main