J/A+A/623/A123ivo://CDS.VizieR/J/A+A/623/A123doi:10.26093/cds/vizier.36230123CDSGhari A.Famaey B.Laporte C.Haghi H.2020-06-08T10:41:54Z2019-03-18T08:21:56ZCDS support team

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

cds-question@unistra.frgalaxy-rotationDark matter-baryon scaling relations in galaxies are important in order to constrain galaxy formation models. Here, we provide a modern quantitative assessment of those relations, by modelling the rotation curves of galaxies from the Spitzer Photometry and Accurate Rotation Curves (SPARC) database with the Einasto dark halo model. We focus in particular on the comparison between the original SPARC parameters, with constant mass-to-light ratios for bulges and disks, and the parameters for which galaxies follow the tightest radial acceleration relation. We show that fits are improved in the second case, and that the pure halo scaling relations also become tighter. We report that the density at the radius where the slope is -2 is strongly anticorrelated to this radius, and to the Einasto index. The latter is close to unity for a large number of galaxies, indicative of large cores. In terms of dark matter-baryon scalings, we focus on relations between the core properties and the extent of the baryonic component, which are relevant to the cusp-core transformation process. We report a positive correlation between the core size of halos with small Einasto index and the stellar disk scale-length, as well as between the averaged dark matter density within 2kpc and the baryon-induced rotational velocity at that radius. This finding is related to the consequence of the radial acceleration relation on the diversity of rotation curve shapes, quantified by the rotational velocity at 2kpc. While a tight radial acceleration relation slightly decreases the observed diversity compared to the original SPARC parameters, the diversity of baryon-induced accelerations at 2kpc is sufficient to induce a large diversity, incompatible with current hydrodynamical simulations of galaxy formation, while maintaining a tight radial acceleration relation.2019A&A...623A.123Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/623/A123CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/152/157 : Mass models for 175 disk galaxies with SPARC (Lelli+, 2016)http://astroweb.cwru.edu/SPARC/ : SPARC databasehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/623/A123https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/623/A123http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/623/A123https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/623/A123https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/623/A123http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/623/A123GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/623/A123/tablea1 (Rotation curve fit results)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/623/A123/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/623/A123/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/623/A123/tablea1?GETtext/xml+votable180.050000true157.098418668.41206690.0055555555555555566/955 975 1007 1114 1561 2071 2169 2351 2383 2409 2866 3511 3519 4511 4522 4534 4554 4650 4689 4695 5067 5124 5129 5131 5168 5174 5230 5329 5469 5500 5503-5504 5581 5584 5587 5589 5591 5594 5596 5599 5623 5625 5628-5629 5631 5636 5669 5710 5751 5827 5956 5967 5975 5982 6604 6623 7132 7241 7303 7523 7602 7624 7743 7882 7946 7957 8552 8557 8827 9097 9463 9855 10282 10286 10475 10511 10637 10662 10809 10817 10841 10847 10881 10908 10910 10924-10925 10927 10930 10935 10941 10976 10979 10990-10991 11000 11006 11019 11030 11092 11127 11375 11389 11448 11566 11639 11696 12570 13489 13522 13668 15551 15592 15594 16083 16441 16519 16595 16701 17165 17753 18315 18378 19570 19697 19843 20020 20353 20438 24952 26106 27030 27468 28077 28087 28107 28149 28230 28259 28261 28346 28463 28496 28535 28631 28638 32231 33435 33589 35514 35536 35746 36974 38846 40531 43972https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/623/A123?format=asciidefaultJ/A+A/623/A123/tablea1Rotation curve fit resultsSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName of the galaxiesmeta.id;meta.maincharrho-2Einasto parameter rho_-2_, density at radius r-20.001solMass.pc**-3pos.distance;phys.densityfloate_rho-2Error on rho-2 (lower value, 68 percent confidence interval)0.001solMass.pc**-3stat.errorfloatE_rho-2Error on rho-2 (upper value, 68 percent confidence interval)0.001solMass.pc**-3stat.error;stat.maxfloatr-2Einasto parameter r_-2_, radius at which the density profile has a slope of -2kpcphys.size.radiusfloate_r-2Error on r-2 (lower value, 68 percent confidence interval)kpcstat.errorfloatE_r-2Error on r-2 (upper value, 68 percent confidence interval)kpcstat.error;stat.maxfloatnEinasto index n, sets the general shape of the density profilestat.fit.paramfloate_nError on n (lower value, 68 percent confidence interval)stat.errorfloatE_nError on n (upper value, 68 percent confidence interval)stat.error;stat.maxfloatVmaxMaximum circular velocity of the halokm/sphys.veloc;stat.maxfloatVrotRotational velocity at 2kpc from the centerkm/sphys.veloc.rotatfloatL16Display the Li et al. (2016, cat. J/AJ/152/157) datameta.ref.urlchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main