J/ApJ/862/34ivo://CDS.VizieR/J/ApJ/862/34doi:10.26093/cds/vizier.18620034CDSNakashima S.Inoue Y.Yamasaki N.Sofue Y.Kataoka J.Sakai K.2019-08-26T07:35:23Z2019-08-19T09:04:03ZCDS support team

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

cds-question@unistra.frmilky-way-galaxyx-ray-sourcesinterstellar-mediumThe formation mechanism of the hot gaseous halo associated with the Milky Way is still under debate. We report new observational constraints on the gaseous halo using 107 lines of sight of the Suzaku X-ray observations at 75{deg}<l<285{deg} and |b|>15{deg} with a total exposure of 6.4Ms. The gaseous halo spectra are represented by a single-temperature plasma model in collisional ionization equilibrium. The median temperature of the observed fields is 0.26keV (3.0x10^6^K) with a typical fluctuation of ~30%. The emission measure varies by an order of magnitude and marginally correlates with the Galactic latitude. Despite the large scatter of the data, the emission measure distribution is roughly reproduced by a disk-like density distribution with a scale length of ~7kpc, a scale height of ~2kpc, and a total mass of ~5x10^7^M_{sun}_. In addition, we found that a spherical hot gas with the {beta}-model profile hardly contributes to the observed X-rays but that its total mass might reach >~10^9^M_{sun}_. Combined with indirect evidence of an extended gaseous halo from other observations, the hot gaseous halo likely consists of a dense disk-like component and a rarefied spherical component; the X-ray emissions primarily come from the former, but the mass is dominated by the latter. The disk-like component likely originates from stellar feedback in the Galactic disk due to the low scale height and the large scatter of the emission measures. The median [O/Fe] of ~0.25 shows the contribution of the core-collapse supernovae and supports the stellar feedback origin.2018ApJ...862...34Nhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/862/34CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVIII/76 : Leiden/Argentine/Bonn (LAB) Survey of Gal. HI (Kalberla+ 2005)J/MNRAS/430/60 : Suzaku view of highly ionized outflows in AGN (Gofford+, 2013)J/ApJ/773/92 : XMM survey of soft background. III. Gal. halo (Henley+, 2013)J/A+A/553/A12 : XMM SSC survey of Galactic Plane (Nebot Gomez-Moran+, 2013)J/A+A/627/A100 : HESS and Suzaku observations of Vela X (HESS Coll+, 2019)https://heasarc.gsfc.nasa.gov/W3Browse/all/xray.html/ : Master X-ray cataloghttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/862/34https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/862/34http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/862/34https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/862/34https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/862/34http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/862/34GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/862/34/table1 (Observations and fitting results)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/862/34/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/862/34/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/862/34/table1?GETtext/xml+votable180.050000true198.742731.64520.0055555555555555566/18 205 579 594 815 2110 2127 2129 2134 2623 3422 4116 4480 4709 4820 5152 5170 5310 5379 5597 5668 5795 5845 5976 6069 6173 6376 6617 7184 7257 7281 7305 7309 7315 7320 7371 7375 7582 7659 8028 8085 10065 10398 10672 10927 11206 11457 11533 11546 11564 11668 11862 12088 12241 12277 13466 15061 15915 15996 16040 16042 16690 16816 16882 17341 17492 17510 17529 19574 19619 20107 20212 20379 20516 20552 22537 22595 22745 22813 25273 25310 25518 25561 27191 27245 27549 28393 28464 33109 33209 33552 33713 33925 34291 34361 34605 35078 35285 35608 35627 35934 36181 36721 38382 38973 40446https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/862/34?format=asciiX-raydefaultJ/ApJ/862/34/table1Observations and fitting resultsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintReg[1/107] Region numberobs.fieldintSeq[100018010/904001010] Sequence identifier in Suzaku archivemeta.id;obslongNameTarget name in event headermeta.id;meta.maincharGLONGalactic longitude of aim pointdegpos.galactic.lonGLATGalactic latitude of aim pointdegpos.galactic.latExp[10.8/167] Effective exposure time after screeningkstime.duration;obs.exposurefloatl_DYELimit flag on DYEmeta.code.errorcharDYE[20/90] Screening criteria for DYE_ELV cutdeginstr.setupintNH[0.6/27.6] Fixed H I column density (1)1e+20cm**-2phys.columnDensityfloatkThalo[0.1/0.8]? Hot gaseous halo temperaturekeVphys.temperaturefloatnullablee_kThalo[0/0.3]? Lower uncertainty in kThalokeVstat.errorfloatnullableE_kThalo[0/0.2]? Upper uncertainty in kThalokeVstat.error;stat.maxfloatnullablel_EMhaloLimit flag on EMhalometa.code.errorcharEMhalo[0.6/327]? Hot gaseous halo emission measure0.01pc.cm**-6phys.emissMeasurefloatnullablee_EMhalo[0.1/6.3]? Lower uncertainty in EMhalo0.01pc.cm**-6stat.errorfloatnullableE_EMhalo[0.1/4.8]? Upper uncertainty in EMhalo0.01pc.cm**-6stat.error;stat.maxfloatnullablel_[O/Fe]Limit flag on [O/Fe]meta.code.error;phys.abundchar[O/Fe][-1/1]? Hot gaseous halo O/Fe abundance ratiophys.abund;arith.ratiofloatnullablef_[O/Fe][f] Flag on [O/Fe] (2)meta.codechare_[O/Fe][0.04/0.8]? Lower uncertainty in [O/Fe]stat.error;phys.abundfloatnullableE_[O/Fe][0.04/2.7]? Upper uncertainty in [O/Fe]stat.error;stat.maxfloatnullableZhalo[1]? Hot gaseous metal abundance except for Felog(Sun)phys.abund.ZintnullableShalo[0.5/11.7]? Gasous halo unabsorbed surface brightness (3)1e-15W.m**-2.deg**2phot.mag.sbfloatnullablekTlocal[0.1]? Local component fixed temperaturekeVphys.temperaturefloatnullablel_EMlocalLimit flag on EMlocalmeta.code.errorcharEMlocal[6.4/38.8]? Local component emission measure0.01pc.cm**-6phys.emissMeasure;pos.lg;pos.lsrfloatnullablee_EMlocal[0.6/6.4]? Lower uncertainty in EMlocal0.01pc.cm**-6stat.errorfloatnullableE_EMlocal[0.7/5.3]? Upper uncertainty in EMlocal0.01pc.cm**-6stat.error;stat.maxfloatnullableZlocal[1]? Fixed metal abundancelog(Sun)phys.abund.ZintnullableNCXB[7.5/14.1]? CXB component normalization at 1keVph.cm**-2.s**-1.sr**-1stat.fit.paramfloatnullablee_NCXB[0.1/0.6]? Uncertainty in NCXBph.cm**-2.s**-1.sr**-1stat.errorfloatnullableE_NCXB[0.1/0.6]? Uncertainty in NCXBph.cm**-2.s**-1.sr**-1stat.error;stat.maxfloatnullableC/dofBest-fit C-statistics/degree of freedomstat.fit.dof;meta.modelledchar_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.ranullableindexed_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.decnullableindexed