J/MNRAS/495/58ivo://CDS.VizieR/J/MNRAS/495/58doi:10.26093/cds/vizier.74950058CDSSantos-Santos I.M.E.Navarro J.F.Robertson A.Benitez-Llambay A.,Oman K.A.Lovell M.R.Frenk C.S.Ludlow A.D.Fattahi A.Ritz A.2024-08-21T20:15:04Z2023-09-04T08:53:18ZCDS support team

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

cds-question@unistra.frdwarf-galaxiesgalaxy-rotationgalaxy-radiivisible-astronomyinfrared-astronomyWe use a compilation of disc galaxy rotation curves to assess the role of the luminous component ('baryons') in the rotation curve diversity problem. As in earlier work, we find that rotation curve shape correlates with baryonic surface density: high surface density galaxies have rapidly rising rotation curves consistent with cuspy cold dark matter haloes; slowly rising rotation curves (characteristic of galaxies with inner mass deficits or 'cores') occur only in low surface density galaxies. The correlation, however, seems too weak to be the main driver of the diversity. In addition, dwarf galaxies exhibit a clear trend, from 'cuspy' systems where baryons are unimportant in the inner mass budget to 'cored' galaxies where baryons actually dominate. This trend constrains the various scenarios proposed to explain the diversity, such as (i) baryonic inflows and outflows during galaxy formation; (ii) dark matter self-interactions; (iii) variations in the baryonic mass structure coupled to rotation velocities through the 'mass discrepancy-acceleration relation' (MDAR); or (iv) non-circular motions in gaseous discs. Together with analytical modelling and cosmological hydrodynamical simulations, our analysis shows that each of these scenarios has promising features, but none seems to fully account for the observed diversity. The MDAR, in particular, is inconsistent with the observed trend between rotation curve shape and baryonic importance; either the trend is caused by systematic errors in the data or the MDAR does not apply. The origin of the dwarf galaxy rotation curve diversity and its relation to the structure of cold dark matter haloes remains an open issue.2020MNRAS.495...58Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/495/58CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/152/157 : Mass models for 175 disk galaxies with SPARC (Lelli+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/495/58https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/495/58http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/495/58https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/495/58https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/495/58http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/495/58GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/495/58/tablea1 (Observational data used in this work)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/495/58/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/495/58/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/495/58/tablea1?GETtext/xml+votable180.050000true73.279583367.09916670.0055555555555555566/816 975 1007 1114 1561 2320 2351 2383 2409 2866 3389 3436 3511 3519 3573 4511 4522 4534 4554 4650 5067 5124 5129 5168 5174 5230 5329 5469 5500 5503-5504 5581 5584 5587 5591 5594 5596 5599 5623 5625 5628-5629 5636 5669 5710 5751 5827 5956 5967 5975 5982 6502 6604 6623 7132 7241 7303 7523 7624 7708 7743 7799 7878 7882 7957 8552 8557 9097 9463 9855 10282 10475 10511 10637 10662 10689 10762 10809 10841 10847 10881 10908 10910 10924-10925 10927 10930 10935 10941 10970 10976 10979 10990-10991 11000 11019 11030 11092 11127 11375 11389 11448 11566 11639 12570 13130 13522 13668 15592 15594 16083 16441 16519 16595 16701 17165 17753 18041 18378 19570 19697 19843 19990 20020 20353 20438 24952 26106 27030 28033 28087 28107 28149 28230 28261 28346 28463 28496 28510 28535 28638 31632 32231 33435 33589 33986 35514 35536 35746 36974 38390 38846 40531 43972https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/495/58?format=asciiOpticalInfrareddefaultJ/MNRAS/495/58/tablea1Observational data used in this workSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameGalaxy namemeta.id;meta.maincharSampleSample the galaxy belongs to (1)meta.bibcharVmaxMaximum circular velocitykm/sphys.velocfloatVbmaxBaryonic contribution to Vmaxkm/sphys.velocfloatVfidRotation velocity at the fiducial inner radius (r_fid_) (2)km/sphys.veloc.rotatfloatVbfidBaryonic contribution to Vfidkm/sphys.veloc.rotatfloatMbarTotal baryonic masssolMassphys.massdoublerbhalfHalf mass radius of the galaxykpcphys.size.radiusfloatM200Virial masssolMassphys.massdouble_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