J/ApJ/833/119ivo://CDS.VizieR/J/ApJ/833/119doi:10.26093/cds/vizier.18330119CDSAstraatmadja T.L.Bailer-Jones C.A.L.2018-01-26T15:01:25Z2017-04-04T11:14:01ZCDS support team

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

cds-question@unistra.frsurveysvisible-astronomytrigonometric-parallaxstellar-distanceWe infer distances and their asymmetric uncertainties for two million stars using the parallaxes published in the Gaia DR1 (GDR1) catalogue. We do this with two distance priors: A minimalist, isotropic prior assuming an exponentially decreasing space density with increasing distance, and an anisotropic prior derived from the observability of stars in a Milky Way model. We validate our results by comparing our distance estimates for 105 Cepheids which have more precise, independently estimated distances. For this sample we find that the Milky Way prior performs better (the RMS of the scaled residuals is 0.40) than the exponentially decreasing space density prior (RMS is 0.57), although for distances beyond 2kpc the Milky Way prior performs worse, with a bias in the scaled residuals of -0.36 (vs. -0.07 for the exponentially decreasing space density prior). We do not attempt to include the photometric data in GDR1 due to the lack of reliable colour information. Our distance catalogue is available at http://www.mpia.de/homes/calj/tgas_distances/main.html. These should only be used to give individual distances. Combining data or testing models should be done with the original parallaxes, and attention paid to correlated and systematic uncertainties.2016ApJ...833..119Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/833/119CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/337 : Gaia DR1 (Gaia Collaboration, 2016)J/A+A/550/A70 : Galactic & Magellanic Clouds Cepheids distanceshttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/833/119https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/833/119http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/833/119https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/833/119https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/833/119http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/833/119GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/833/119/distall (Distances and uncertainties of all TGAS sources, no systematics uncertainties included (tgas_dist_all_v01))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/833/119/distall?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/833/119/distall?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/833/119/distall?GETtext/xml+votable180.050000true45.0343321909580.2353897010980.005555555555555556Cone search capability for table J/ApJ/833/119/distallw (Distances and uncertainties of all TGAS sources, systematics uncertainties of 0.3mas included (tgas_dist_all_withsys_v01.csv))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/833/119/distallw?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/833/119/distallw?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/833/119/distallw?GETtext/xml+votable180.050000true45.0343321909580.2353897010980.005555555555555556Cone search capability for table J/ApJ/833/119/distcep (Distances and uncertainties of all TGAS sources containing Groenewenegen (2013, J/A+A/550/A70) Cepheids, no systematics uncertainties included (tgas_dist_cepheids_v01.csv))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/833/119/distcep?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/833/119/distcep?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/833/119/distcep?GETtext/xml+votable180.050000true337.20867975113258.2109331266490.005555555555555556Cone search capability for table J/ApJ/833/119/distcepw (Distances and uncertainties of all TGAS sources containing Groenewenegen (2013, J/A+A/550/A70) Cepheids, systematics uncertainties of 0.3mas included (tgas_dist_cepheids_withsys_v01.csv))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/833/119/distcepw?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/833/119/distcepw?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/833/119/distcepw?GETtext/xml+votable180.050000true337.20867975113258.2109331266490.0055555555555555560/1 3 5 7 9 11 1/0 2 3 9 10 11 16 18 19 24 26 27 32 33 34 40 42 43 2/5 6 7 33 34 35 68 69 71 100 102 103 140 141 143 166 3/17 18 19 128 129 130 280 281 282 404 406 568 570 571 656 658 659 661 662 663 668 669 670 4/64 65 66 524 526 527 1132 1133 1134 1620 1621 1623 1628 1630 2276 2277 2279 2628 2630 2631 2641 2642 2643 2684 2685 2686 5/268 270 271 2100 2101 2102 4540 4541 4542 6488 6490 6491 6517 6519 6524 6526 9112 9113 9115 10516 10518 10519 10560 10561 10563 10749 10750 10751 6/1077 1078 1079 8412 8413 8415 18172 18173 18174 25957 25958 26065 26066 26067 26072 26074 26075 26101 26102 26103 26108 26110 26111 36456 36458 36459 42068 42070 42071 42248 42250 42251 42994 42995https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/833/119?format=asciiOpticaldefaultJ/ApJ/833/119/distallDistances and uncertainties of all TGAS sources, no systematics uncertainties included (tgas_dist_all_v01)HIP? Hipparcos identifiermeta.idintnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTycho2Tycho 2 identifiermeta.idcharSourceGaia (I/337) source IDmeta.id;meta.mainGLONGalactic longitude at epoch J2015.0degpos.galactic.lonindexedGLATGalactic latitude at epoch J2015.0degpos.galactic.latindexedvarpiAbsolute barycentric stellar parallax of the source at epoch 2015.0maspos.parallaxdoublee_varpiStandard error of parallaxmasstat.errordouble<Gmag>G-band mean magnitudemagphot.mag;em.opt.B;stat.meanfloatrMoExp1Mode distance of the posterior, using the exponentially decreasing space density prior with L=0.11kpcpcpos.distance;pos.heliocentricdoubler5Exp15th percentile of the posterior, using the exponentially decreasing space density prior with L=0.11kpcpcstat.errordoubler50Exp150th percentile (i.e. the median) of the posterior, using the exponentially decreasing space density prior with L=0.11kpcpcstat.errordoubler95Exp195th percentile of the posterior, using the exponentially decreasing space density prior with L=0.11kpcpcstat.errordoublesigmaRExp1Distance standard error, using the exponentially decreasing space density prior with L=0.11kpcpcstat.errordoublerMoExp2Mode distance of the posterior, using the exponentially decreasing space density prior with L=1.35kpcpcpos.distance;pos.heliocentricdoubler5Exp25th percentile of the posterior, using the exponentially decreasing space density prior with L=1.35kpcpcstat.errordoubler50Exp250th percentile (i.e. the median) of the posterior, using the exponentially decreasing space density prior with L=1.35kpcpcstat.errordoubler95Exp295th percentile of the posterior, using the exponentially decreasing space density prior with L=1.35kpcpcstat.errordoublesigmaRExp2Distance standard error, using the exponentially decreasing space density prior with L=1.35kpcpcstat.errordoublerMoMWMode distance of the posterior, using Milky Way Priorpcpos.distance;pos.heliocentricdoubler5MW5th percentile of the posterior, using Milky Way Priorpcstat.errordoubler50MW50th percentile (i.e. the median) of the posterior, using Milky Way Priorpcstat.errordoubler95MW95th percentile of the posterior, using Milky Way Priorpcstat.errordoublesigmaRMWDistance standard error, using Milky Way Priorpcstat.errordouble_RA.icrsRight ascension (ICRS) at Epoch=J2015. (computed by VizieR, not part of the original data)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) at Epoch=J2015. (computed by VizieR, not part of the original data)degpos.eq.decnullableindexedJ/ApJ/833/119/distallwDistances and uncertainties of all TGAS sources, systematics uncertainties of 0.3mas included (tgas_dist_all_withsys_v01.csv)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHIP? Hipparcos identifiermeta.idintnullableTycho2Tycho 2 identifiermeta.idcharSourceGaia (I/337) source IDmeta.id;meta.mainGLONGalactic longitude at epoch J2015.0degpos.galactic.lonindexedGLATGalactic latitude at epoch J2015.0degpos.galactic.latindexedvarpiAbsolute barycentric stellar parallax of the source at epoch 2015.0maspos.parallaxdoublee_varpiStandard error of parallaxmasstat.errordouble<Gmag>G-band mean magnitudemagphot.mag;em.opt.B;stat.meanfloatrMoExp1Mode distance of the posterior, using the exponentially decreasing space density prior with L=0.11kpcpcpos.distance;pos.heliocentricdoubler5Exp15th percentile of the posterior, using the exponentially decreasing space density prior with L=0.11kpcpcstat.errordoubler50Exp150th percentile (i.e. the median) of the posterior, using the exponentially decreasing space density prior with L=0.11kpcpcstat.errordoubler95Exp195th percentile of the posterior, using the exponentially decreasing space density prior with L=0.11kpcpcstat.errordoublesigmaRExp1Distance standard error, using the exponentially decreasing space density prior with L=0.11kpcpcstat.errordoublerMoExp2Mode distance of the posterior, using the exponentially decreasing space density prior with L=1.35kpcpcpos.distance;pos.heliocentricdoubler5Exp25th percentile of the posterior, using the exponentially decreasing space density prior with L=1.35kpcpcstat.errordoubler50Exp250th percentile (i.e. the median) of the posterior, using the exponentially decreasing space density prior with L=1.35kpcpcstat.errordoubler95Exp295th percentile of the posterior, using the exponentially decreasing space density prior with L=1.35kpcpcstat.errordoublesigmaRExp2Distance standard error, using the exponentially decreasing space density prior with L=1.35kpcpcstat.errordoublerMoMWMode distance of the posterior, using Milky Way Priorpcpos.distance;pos.heliocentricdoubler5MW5th percentile of the posterior, using Milky Way Priorpcstat.errordoubler50MW50th percentile (i.e. the median) of the posterior, using Milky Way Priorpcstat.errordoubler95MW95th percentile of the posterior, using Milky Way Priorpcstat.errordoublesigmaRMWDistance standard error, using Milky Way Priorpcstat.errordouble_RA.icrsRight ascension (ICRS) at Epoch=J2015. (computed by VizieR, not part of the original data)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) at Epoch=J2015. (computed by VizieR, not part of the original data)degpos.eq.decnullableindexedJ/ApJ/833/119/distcepDistances and uncertainties of all TGAS sources containing Groenewenegen (2013, J/A+A/550/A70) Cepheids, no systematics uncertainties included (tgas_dist_cepheids_v01.csv)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTycho2Tycho 2 identifiermeta.idcharHIP? Hipparcos identifiermeta.idintnullableSourceGaia (I/337) source IDmeta.id;meta.mainGLONGalactic longitude at epoch J2015.0degpos.galactic.lonGLATGalactic latitude at epoch J2015.0degpos.galactic.latvarpiAbsolute barycentric stellar parallax of the source at epoch 2015.0maspos.parallaxdoublee_varpiStandard error of parallaxmasstat.errordouble<Gmag>G-band mean magnitudemagphot.mag;em.opt.B;stat.meanfloatrMoExp1Mode distance of the posterior, using the exponentially decreasing space density prior with L=0.11kpcpcpos.distance;pos.heliocentricdoubler5Exp15th percentile of the posterior, using the exponentially decreasing space density prior with L=0.11kpcpcstat.errordoubler50Exp150th percentile (i.e. the median) of the posterior, using the exponentially decreasing space density prior with L=0.11kpcpcstat.errordoubler95Exp195th percentile of the posterior, using the exponentially decreasing space density prior with L=0.11kpcpcstat.errordoublesigmaRExp1Distance standard error, using the exponentially decreasing space density prior with L=0.11kpcpcstat.errordoublerMoExp2Mode distance of the posterior, using the exponentially decreasing space density prior with L=1.35kpcpcpos.distance;pos.heliocentricdoubler5Exp25th percentile of the posterior, using the exponentially decreasing space density prior with L=1.35kpcpcstat.errordoubler50Exp250th percentile (i.e. the median) of the posterior, using the exponentially decreasing space density prior with L=1.35kpcpcstat.errordoubler95Exp295th percentile of the posterior, using the exponentially decreasing space density prior with L=1.35kpcpcstat.errordoublesigmaRExp2Distance standard error, using the exponentially decreasing space density prior with L=1.35kpcpcstat.errordoublerMoMWMode distance of the posterior, using Milky Way Priorpcpos.distance;pos.heliocentricdoubler5MW5th percentile of the posterior, using Milky Way Priorpcstat.errordoubler50MW50th percentile (i.e. the median) of the posterior, using Milky Way Priorpcstat.errordoubler95MW95th percentile of the posterior, using Milky Way Priorpcstat.errordoublesigmaRMWDistance standard error, using Milky Way Priorpcstat.errordoubleCepNameCepheid namemeta.idcharHIPNameHipparcos identifier (HIP NNNNNN)meta.idcharTYCTycho 2 identifier (TYC NNNN-NNNN-N)meta.idcharrCepCepheid distancepcpos.distance;pos.heliocentricfloatsigmaRCep1Error in the fit on rCeppcstat.errorfloatsigmaRCep2Error based on Monte-Carlo simulation on rCeppcstat.errorfloat_RA.icrsRight ascension (ICRS) at Epoch=J2015. (computed by VizieR, not part of the original data)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) at Epoch=J2015. (computed by VizieR, not part of the original data)degpos.eq.decnullableindexedJ/ApJ/833/119/distcepwDistances and uncertainties of all TGAS sources containing Groenewenegen (2013, J/A+A/550/A70) Cepheids, systematics uncertainties of 0.3mas included (tgas_dist_cepheids_withsys_v01.csv)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHIP? Hipparcos identifiermeta.idintnullableTycho2Tycho 2 identifiermeta.idcharSourceGaia (I/337) source IDmeta.id;meta.mainGLONGalactic longitude at epoch J2015.0degpos.galactic.lonGLATGalactic latitude at epoch J2015.0degpos.galactic.latvarpiAbsolute barycentric stellar parallax of the source at epoch 2015.0maspos.parallaxdoublee_varpiStandard error of parallaxmasstat.errordouble<Gmag>G-band mean magnitudemagphot.mag;em.opt.B;stat.meanfloatrMoExp1Mode distance of the posterior, using the exponentially decreasing space density prior with L=0.11kpcpcpos.distance;pos.heliocentricdoubler5Exp15th percentile of the posterior, using the exponentially decreasing space density prior with L=0.11kpcpcstat.errordoubler50Exp150th percentile (i.e. the median) of the posterior, using the exponentially decreasing space density prior with L=0.11kpcpcstat.errordoubler95Exp195th percentile of the posterior, using the exponentially decreasing space density prior with L=0.11kpcpcstat.errordoublesigmaRExp1Distance standard error, using the exponentially decreasing space density prior with L=0.11kpcpcstat.errordoublerMoExp2Mode distance of the posterior, using the exponentially decreasing space density prior with L=1.35kpcpcpos.distance;pos.heliocentricdoubler5Exp25th percentile of the posterior, using the exponentially decreasing space density prior with L=1.35kpcpcstat.errordoubler50Exp250th percentile (i.e. the median) of the posterior, using the exponentially decreasing space density prior with L=1.35kpcpcstat.errordoubler95Exp295th percentile of the posterior, using the exponentially decreasing space density prior with L=1.35kpcpcstat.errordoublesigmaRExp2Distance standard error, using the exponentially decreasing space density prior with L=1.35kpcpcstat.errordoublerMoMWMode distance of the posterior, using Milky Way Priorpcpos.distance;pos.heliocentricdoubler5MW5th percentile of the posterior, using Milky Way Priorpcstat.errordoubler50MW50th percentile (i.e. the median) of the posterior, using Milky Way Priorpcstat.errordoubler95MW95th percentile of the posterior, using Milky Way Priorpcstat.errordoublesigmaRMWDistance standard error, using Milky Way Priorpcstat.errordoubleCepNameCepheid namemeta.idcharHIPNameHipparcos identifier (HIP NNNNNN)meta.idcharTYCTycho 2 identifier (TYC NNNN-NNNN-N)meta.idcharrCepCepheid distancepcpos.distance;pos.heliocentricfloatsigmaRCep1Error in the fit on rCeppcstat.errorfloatsigmaRCep2Error based on Monte-Carlo simulation on rCeppcstat.errorfloat_RA.icrsRight ascension (ICRS) at Epoch=J2015. (computed by VizieR, not part of the original data)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) at Epoch=J2015. (computed by VizieR, not part of the original data)degpos.eq.decnullableindexed