J/ApJ/626/195ivo://CDS.VizieR/J/ApJ/626/195doi:10.26093/cds/vizier.16260195CDSGibson S.J.Taylor A.R.Higgs L.A.Brunt C.M.Dewdney P.E.2014-03-16T09:47:12Z2014-03-03T14:00:06ZCDS support team

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

cds-question@unistra.frh-i-line-emissioninterstellar-mediumWe present a 21cm line HI self-absorption (HISA) survey of cold atomic gas within Galactic longitudes l=75{deg} to 146{deg} and latitudes b=-3{deg} to +5{deg}. We identify HISA as spatially and spectrally confined dark HI features and extract it from the surrounding HI emission in the arcminute-resolution Canadian Galactic Plane Survey (CGPS). We compile a catalog of the most significant features in our survey and compare our detections against those in the literature. Within the parameters of our search, we find nearly all previously detected features and identify many new ones.2005ApJ...626..195Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/626/195CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/cgps : Log of CGPS exposures (Taylor+, 2003-)VIII/54 : Atlas of Galactic Neutral Hydrogen (Hartmann+, 1997)VIII/11 : Berkeley Low-Latitude H I Survey (Weaver+ 1973)VIII/47 : Galactic 21-cm line Survey (Westerhout+ 1982)J/ApJ/626/887 : HI clouds in Southern Galactic Plane Survey (Kavars+, 2005)J/MNRAS/201/495 : HI Survey of Southern Galactic Plane (Strong+ 1982)http://www.ras.ucalgary.ca/CGPS/ : Canadian Galactic Plane Survey home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/626/195https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/626/195http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/626/195https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/626/195https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/626/195http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/626/195GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/626/195/table1 (Major CGPS HI Self-Absorption (HISA) features)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/626/195/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/626/195/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/626/195/table1?GETtext/xml+votable180.050000true308.2214140.93960.0055555555555555565/910 6/3047 3057 3060 3061 3069 3166 3182 3184 3187 3192 3194 3269 3275 3276 3277 3278 3282 3283 3299 3302 3634 3636 3637 3648 3718 3719 3726 14207 14271 14292 14298 14305 14310 14322 14331 14692 14710 15370 15371 15395 15401 15403 15406 15409 15411 15412 15413 15415 15430 15432 15433 15437 15438 15440 15446 15451 15632 15634 15636https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/626/195?format=asciiRadiodefaultJ/ApJ/626/195/table1Major CGPS HI Self-Absorption (HISA) featuresrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGHISAFeature designation (\dicS{GHISA LLL.ll+B.bb+VV} in Simbad)meta.id;meta.maincharGLONGalactic longitude (1)degpos.galactic.lonGLATGalactic latitude (1)degpos.galactic.latVLSRLocal standard of rest velocity (1)km/sphys.veloc;pos.lsrfloatDlon{Delta}l box dimension (2)degphys.angSize;srcfloatDlat{Delta}b box dimension (2)degphys.angSize;srcfloatDv{Delta}v box dimension (2)km/sphys.veloc;arith.difffloatVolVolume occupied by |{Delta}T|>0 voxels (3)deg**2.km.s**-1phys.volumefloatAreaProjected area of feature volumedeg**2phys.angSizefloatIntAbsThree-dimensional integrated absorption of feature {int}{Delta}T.dVK.deg**2.km.s**-1phys.absorptionfloat<dT>[-25/-7] Mean absorption <{Delta}T> per voxel (4)Kphys.absorptionfloatdTmin[-81/-27] Maximum absorption in any voxel ({Delta}Tmin=-|{Delta}T|max)Kphys.absorptionfloat<Tu>[71/108] Mean unabsorbed brightness temperature T_U_ per voxelKphys.temperature;stat.meanfloatphiU[0/1] Fraction {phi}_U_ of detected volume for which T_U_>=80K (5)stat.fit.goodnessfloatetaV[0.6/1] Fraction of detected volume (6)stat.fit.goodnessfloatetaT[0.6/1] Fraction of detected absorption (7)stat.fit.goodnessfloatRefPrior detections of this feature in the literature, if any (references in table2)meta.bibchar_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)degpos.eq.decnullableindexedJ/ApJ/626/195/table2Prior HISA studies in the CGPS regionrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRef[1/28] Reference numbermeta.id;meta.mainintBibcodeBibcodemeta.bib.bibcodecharAutAuthor's namemeta.bib.authorcharTelName of radio telescopemeta.id;instr.telcharn_TelObservation of a survey (1)meta.notecharBeamAngular resolution (FWHM)degphys.angSize;instr.beamfloatDvVelocity channel separation {Delta}v (km/s)km/sspect.resolutioncharMap[Yn] Were maps made of HISA features?meta.codecharNc[1/41] Number of features covered (2)meta.numberintNf[0/29] Number of features found (3)meta.numberintNm[0/17] Number of major features (4)meta.numberint