J/MNRAS/500/655ivo://CDS.VizieR/J/MNRAS/500/655CDSDas S.Mathur S.Gupta A.Nicastro F.Krongold Y.2023-11-09T07:45:30Z2023-11-09T08:44:30ZCDS support team

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

cds-question@unistra.frmilky-way-galaxygalaxiesquasarstransient-sourcesradio-sourcesx-ray-sourcesWe provide an empirical list of the Galactic dispersion measure (DM_Gal_) contribution to the extragalactic fast radio bursts (FRBs) along 72 sightlines. It is independent of any model of the Galaxy, i.e. we do not assume the density of the disc or the halo, spatial extent of the halo, baryonic mass content, or any such external constraints to measure DM_Gal_. We use 21-cm, UV, EUV, and X-ray data to account for different phases, and find that DM_Gal_ is dominated by the hot phase probed by X-ray absorption. We improve upon the measurements of N(OVII) and f_OVII_ compared to previous studies, thus providing a better estimate of the hot phase contribution. The median DM_Gal_=64^+20^_-23_cm^-3^pc, with a 68 per cent (90 per cent) confidence interval of 33-172(23-660)cm^-3^pc. The DM_Gal_ does not appear to follow any trend with the Galactic longitude or latitude, and there is a large scatter around the values predicted by simple disc + spherical halo models. Our measurements provide more complete and accurate estimates of DM_Gal_ independent from the previous studies. We provide a table and a code to retrieve DM_Gal_ for any FRB localized in the sky.2021MNRAS.500..655Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/500/655CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/594/A116 : HI4PI spectra and column density maps (HI4PI team+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/500/655https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/500/655http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/500/655https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/500/655https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/500/655http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/500/655GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/500/655/tablea1 (DM_hot_ based on the OVII and OVIII measurements of Gupta et al. (2012ApJ...756L...8G, 2017ApJ...836..243G) and DM_cold_ based on the 21-cm measurements of HI4PI Collaboration (2016A&A...594A.116H))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/500/655/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/500/655/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/500/655/tablea1?GETtext/xml+votable180.050000true233.979557.89890.005555555555555556Cone search capability for table J/MNRAS/500/655/tablea2 (DM_hot_ based on the OVII and OVIII measurements of Nicastro et al. (2016) and DM_cold_ based on the 21-cm measurements of HI4PI Collaboration (2016A&A...594A.116H))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/500/655/tablea2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/500/655/tablea2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/500/655/tablea2?GETtext/xml+votable180.050000true272.1196-36.97540.005555555555555556Cone search capability for table J/MNRAS/500/655/tablea3 (DM_cold_ and DM_hot_ based on the ionization modelling of Gatuzz & Churazov (2018MNRAS.474..696G))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/500/655/tablea3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/500/655/tablea3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/500/655/tablea3?GETtext/xml+votable180.050000true194.3994-69.28520.005555555555555556Cone search capability for table J/MNRAS/500/655/tablea4 (Average and maximum Galactic DM, combining multiple methods and instruments)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/500/655/tablea4?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/500/655/tablea4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/500/655/tablea4?GETtext/xml+votable180.050000true194.399420373-69.2851933680.0055555555555555566/1196 2134 3431 4488 5367 5423 6021 6977 7246 7642 8299 8922 9194 9612 10605 10927 11388 11898 12025 12405 13414 13875 14632 14858 15351 15934 16301 16447 16671 17075 19283 19730 19883 20537 23134 23323 26131 26148 26292 26310 26650 27862 28356 28690 28745 28751 28950 28971 29306 29691 29885 29923 30299 30439 31663 33716 33930 34065 34881 36775 38268 39118 39235 41399 41530 42140 42189 42196 42315 42417 42467 43787 47014 47169 47375 49001 49042https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/500/655?format=asciiX-rayRadiodefaultJ/MNRAS/500/655/tablea1DM_hot_ based on the OVII and OVIII measurements of Gupta et al. (2012ApJ...756L...8G, 2017ApJ...836..243G) and DM_cold_ based on the 21-cm measurements of HI4PI Collaboration (2016A&A...594A.116H)SimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLineLine used to compute DMhotmeta.id;spect.linecharNameTarget namemeta.id;meta.maincharGLONGalactic longitudedegpos.galactic.lonGLATGalactic latitudedegpos.galactic.latDMcoldDispersion measure of cold gas based on the 21-cm measurements of HI4PI collaboration et al. (2016A&A...594A.116H, Cat. J/A+A/594/A116) (G1)pc.cm**-3phys.dispMeasurefloatDMhotDispersion measure of hot gas based on the OVII and OVIII measurements of Gupta et al. (2012ApJ...756L...8G, 2017ApJ...836..243G) (G2)pc.cm**-3phys.dispMeasurefloate_DMhotLower error on DMhotpc.cm**-3stat.errorfloatE_DMhotUpper error on DMhotpc.cm**-3stat.error;stat.maxfloat_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.raindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.decindexedJ/MNRAS/500/655/tablea2DM_hot_ based on the OVII and OVIII measurements of Nicastro et al. (2016) and DM_cold_ based on the 21-cm measurements of HI4PI Collaboration (2016A&A...594A.116H)SimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLineLine used to compute DMhot (1)meta.id;spect.linecharNameTarget namemeta.id;meta.mainchar_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.raindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.decindexedGLONGalactic longitudedegpos.galactic.lonGLATGalactic latitudedegpos.galactic.latDMcoldDispersion measure of cold gas based on the 21-cm measurements of HI4PI collaboration et al. (2016A&A...594A.116H, Cat. J/A+A/594/A116) (G1)pc.cm**-3phys.dispMeasurefloate_DMcoldError on DMcoldpc.cm**-3stat.errorfloatDMhotDispersion measure of hot gas based on the OVII and OVIII measurements of Nicastro et al. (2016MNRAS.457..676N) (G2)pc.cm**-3phys.dispMeasuredoublee_DMhot? Lower error on DMhotpc.cm**-3stat.errorfloatnullableE_DMhot? Upper error on DMhotpc.cm**-3stat.error;stat.maxdoublenullableJ/MNRAS/500/655/tablea3DM_cold_ and DM_hot_ based on the ionization modelling of Gatuzz & Churazov (2018MNRAS.474..696G)SimbadNameSimbad column added by the CDSmeta.idcharnullableDMcoldDispersion measure of cold gas based on the ionization modelling of Gatuzz & Chrazov (2018MNRAS.474..696G) (G1)pc.cm**-3phys.dispMeasurefloate_DMcoldError on DMcoldpc.cm**-3stat.errorfloatDMhotDispersion measure of hot gas based on the ionization modelling of Gatuzz & Chrazov (2018MNRAS.474..696G) (G2)pc.cm**-3phys.dispMeasurefloate_DMhotError on DMhotpc.cm**-3stat.errorfloat_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.raindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.decindexedrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameTarget namemeta.id;meta.maincharGLONGalactic longitudedegpos.galactic.lonGLATGalactic latitudedegpos.galactic.latJ/MNRAS/500/655/tablea4Average and maximum Galactic DM, combining multiple methods and instrumentsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGLONGalactic longitudedegpos.galactic.lonGLATGalactic latitudedegpos.galactic.latflag[*] Flag (1)meta.code.errorcharDMavgAverage dispersion measurepc.cm**-3phys.dispMeasuredoublee_DMavgLower error on DMavgpc.cm**-3stat.errordouble_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.raindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.decindexedE_DMavgUpper error on DMavgpc.cm**-3stat.error;stat.maxdoubleDMmaxMaximum dispersion measurepc.cm**-3phys.dispMeasuredoublesDMSystematic uncertainty on the dispersion measurepc.cm**-3stat.error.sysdouble