J/ApJ/794/81ivo://CDS.VizieR/J/ApJ/794/81doi:10.26093/cds/vizier.17940081CDSYung B.H.K.Nakashima J.-I.Henkel C.2017-07-03T13:48:06Z2017-05-16T14:44:28ZCDS support team

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

cds-question@unistra.frastrophysical-masersradio-astronomygiant-starsinfrared-photometryWe explored an efficient method to identify evolved stars with oxygen-rich envelopes in the late asymptotic giant branch (AGB) or post-AGB phase of stellar evolution, which include a rare class of objects - the "water fountains (WF)." Our method considers the OH and H_2_O maser spectra, the near-infrared Q-parameters (these are color indices accounting for the effect of extinction), and far-infrared AKARI colors. Here we first present the results of a new survey on OH and H_2_O masers. There were 108 color-selected objects: 53 of them were observed in the three OH maser lines (1612, 1665, and 1667 MHz), with 24 detections (16 new for 1612 MHz); and 106 of them were observed in the H_2_O maser line (22 GHz), with 24 detections (12 new). We identify a new potential WF source, IRAS 19356+0754, with large velocity coverages of both OH and H_2_O maser emission. In addition, several objects with high-velocity OH maser emission are reported for the first time. The Q-parameters as well as the infrared [09]-[18] and [18]-[65] AKARI colors of the surveyed objects are then calculated. We suggest that these infrared properties are effective in isolating aspherical from spherical objects, but the morphology may not necessarily be related to the evolutionary status. Nonetheless, by considering altogether the maser and infrared properties, the efficiency of identifying oxygen-rich late/post-AGB stars could be improved.2014ApJ...794...81Yhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/794/81CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/298 : AKARI/FIS All-Sky Survey Point Source CataloguesJ/ApJ/769/20 : 22GHz H_2_O maser survey toward IR sources (Yung+, 2013)J/ApJS/211/15 : SiO and H2O maser survey toward AGB + post-AGB starsJ/A+A/578/A119 : Water maser emission toward post-AGB and PN (Gomez+, 2015)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/794/81https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/794/81http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/794/81https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/794/81https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/794/81http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/794/81GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/794/81/table1 (Parameters of the Objects Observed)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/794/81/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/794/81/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/794/81/table1?GETtext/xml+votable180.050000true9.74759.46302780.0055555555555555566/1229 1928 3023 3375 3642 3849 12970 13002 13036 13051 13283 14140 14175 14248 14260 14278 14293 14299 14306 14316 14318 14325 14326 14332 14409 14419 14549 14619 14627 14642 14672 14689 14713 14740 14808 15370 15397 15400 15409 15420 15426 15588 15620 15624 15627 15649 15660 15665 15676 15720 15748 15817 15939 15940 16133 22876 23762 24499 24509 28907 29097 29115 29117 29154 29265 29271 29458 29460 29462 29471 29517 29529 29611 30244 30303 30314 30318 30333 30421 30423 30426 30562 30574 30592 30593 30600 30621 30641 30645 30653 30689 30695 30716 30908 30979 30994 31034 31301 31811 31922 32093 32117https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/794/81?format=asciiRadioInfrareddefaultJ/ApJ/794/81/table1Parameters of the Objects ObservedrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameObject name (HHMMSSs+DDMMSS)meta.id;meta.maincharircin AKARI/irc within 1.5''meta.ref.urlintnullableONameOther object namemeta.idcharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainAC12? AKARI [09]-[18] colorphot.color;em.IR;em.IRfloatnullableAC23? AKARI [18]-[65] colorphot.color;em.IR;em.IRfloatnullableQ1? Near-infrared Q1 parameter (1)stat.fit.paramfloatnullableQ2? Near-infrared Q2 parameter (1)stat.fit.paramfloatnullableOH[YN-] Detection of OH maser emission in the current observation (2)meta.codecharH2O[YN-] Detection of H_2_O maser emission in the current observation (2)meta.codechar