J/ApJ/816/42ivo://CDS.VizieR/J/ApJ/816/42doi:10.26093/cds/vizier.18160042CDSMcGaugh S.S.2017-01-23T22:00:00Z2016-04-05T15:42:34ZCDS support team

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

cds-question@unistra.frastronomical-modelsmilky-way-galaxyThe mass distribution of the Galactic disk is constructed from the terminal velocity curve and the mass discrepancy-acceleration relation. Mass models numerically quantifying the detailed surface density profiles are tabulated. For R_0_=8kpc, the models have stellar mass 5<M_*_<6x10^10^M_{sun}_, scale length 2.0<=R_d_<=2.9kpc, LSR circular velocity 222<={Theta}_0_<=233km/s, and solar circle stellar surface density 34<={Sigma}_d_(R_0_)<=61M_{sun}_/pc2. The present interarm location of the solar neighborhood may have a somewhat lower stellar surface density than average for the solar circle. The Milky Way appears to be a normal spiral galaxy that obeys scaling relations like the Tully-Fisher relation, the size-mass relation, and the disk maximality-surface brightness relation. The stellar disk is maximal, and the spiral arms are massive. The bumps and wiggles in the terminal velocity curve correspond to known spiral features (e.g., the Centaurus arm is a ~50% overdensity). The rotation curve switches between positive and negative over scales of hundreds of parsecs. The rms amplitude <|dV/dR|^2^>^1/2^, implying that commonly neglected terms in the Jeans equations may be nonnegligible. The spherically averaged local dark matter density is {rho}_0,DM_~0.009M_{sun}_/pc3 (0.34GeV/cm3). Adiabatic compression of the dark matter halo may help reconcile the Milky Way with the c-V_200_ relation expected in {Lambda}CDM while also helping to mitigate the too-big-to-fail problem, but it remains difficult to reconcile the inner bulge/bar-dominated region with a cuspy halo. We note that NGC 3521 is a near twin to the Milky Way, having a similar luminosity, scale length, and rotation curve.2016ApJ...816...42Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/816/42CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/ApJS/210/3 : SDSS bulge, disk & total stellar mass estimates (Mendel+, 2014)J/ApJ/716/198 : The DiskMass survey. I. (Bershady+, 2010)J/AJ/136/2563 : HI Nearby Galaxy Survey, THINGS (Walter+, 2008)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/816/42https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/816/42http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/816/42https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/816/42https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/816/42http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/816/42GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/ApJ/816/42/table2Detailed Milky Way mass modelsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintModelModel name by quadrant and bulge fraction (1)meta.id;meta.maincharRad[0.1/150] Galaxy Model Radiuskpcphys.size.radius;meta.modelleddoubleDdisk[0/2029] Surface Density of the stellar disksolMass.pc**-2phys.densitydoubleVdisk[-6.1/204.2] Circular speed of the disk gravitational potentialkm/sphys.velocdoubleDbulge[0/51597] Surface Density of the bulge componentsolMass.pc**-2phys.densitydoubleVbulge[0/231.2] Circular speed of the bulge gravitational potentialkm/sphys.velocdoubleDgas[0/15] Surface Density of gas componentsolMass.pc**-2phys.densitydoubleVgas[-22.6/60.3] Circular speed of the gas gravitational potentialkm/sphys.velocdoubleVtot[20.4/241.1] Total rotation curve of the modelkm/sphys.velocdouble