Matter properties ALFALFA galaxies with TNG100 code J/A+A/706/A64 ivo://CDS.VizieR/J/A+A/706/A64 CDS Yang M. Zhu L. Yu N. Lei Y. Cai R. Wang J. Zheng Z. 2026-03-02T06:25:50Z 2026-01-29T09:44:57Z CDS support team CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France cds-question@unistra.fr galaxies galaxy-rotation h-i-line-emission spectroscopy astrometry radio-galaxies radio-sources stellar-masses galaxy-radii This paper aims to investigate the galaxy-halo connection using a large sample of individual galaxies with HI-integrated spectra. We determined their dark matter content by applying a dynamical method based on HI line widths measured with the curve-of-growth technique, together with inclination corrections inferred from optical images. We built a sample of 2453 gas-rich, predominantly late-type galaxies spanning a stellar mass range of 10^8.7^M_{sun}_ to 10^11.4^M_{sun}_ by matching them one-to-one with their counterparts from the ALFALFA survey and the TNG100 simulation, ensuring a direct match of stellar mass and HI radius. We generated mock images and mock HI-integrated spectra for TNG100 galaxies, and applied the same dynamical method to both ALFALFA and TNG100 mock galaxies to infer their dark matter masses. Across all stellar mass bins, ALFALFA galaxies exhibit lower median dark matter masses than the mock TNG100 simulation results. In each bin, this offset is driven by a tail of galaxies with comparatively low dark matter content, which becomes more prominent toward higher stellar masses. In the highest mass bin (M*>10^11^M_{sun}_), late-type ALFALFA galaxies show a median dark matter mass that is 23% lower than that of their counterparts in the TNG100 dark-matter-only simulation, with 32% of ALFALFA galaxies having M_DM_(<R_HI_)<10^11.5^M_{sun}_, compared to 17% in the mock TNG100 sample. These results suggest that a larger fraction of massive late-type galaxies reside in relatively less massive dark matter haloes than predicted by the TNG100 simulation. 2026A&A...706A..64Y https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/706/A64 Catalog Research IsServedBy TAP VizieR generic service IsServedBy Conesearch service related-to J/A+A/544/A65 : GALEX Arecibo SDSS survey. VI. (Catinella+, 2012) J/ApJS/261/21 : HI emission line profile of ALFALFA nearby galaxies J/ApJ/861/49 : ALFALFA extragalactic HI source catalog (Haynes+, 2018) J/AJ/160/271 : A catalog of ~30000 galaxies with ALFALFA-SDSS J/AJ/142/170 : ALFALFA survey: the {alpha}.40 HI source catalog J/MNRAS/460/2143 : HI size-mass relation of galaxies (Wang+, 2016) J/MNRAS/436/34 : GALEX Arecibo SDSS survey. Final data release J/MNRAS/403/683 : GALEX Arecibo SDSS survey (GASS) (Catinella+, 2010) VIII/77 : HI spectral properties of galaxies (Springob+, 2005) VII/26 : Uppsala General Catalogue of Galaxies (UGC) (Nilson 1973) V/154 : Sloan Digital Sky Surveys (SDSS), Release 16 (DR16) https://cds.unistra.fr/vizier-org/licences_vizier.html https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/706/A64 https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/706/A64 http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/706/A64 https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/706/A64 https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/706/A64 http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/706/A64 GET text/xml+votable https://tapvizier.cds.unistra.fr/TAPVizieR/tap Cone search capability for table J/A+A/706/A64/alfa4844 (ALFALFA parent with physical and structural parameters) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/706/A64/alfa4844? https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/706/A64/alfa4844? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/706/A64/alfa4844? 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Should Not be used for identification. meta.record int AGC Arecibo General Catalog ID (AGC) (1) meta.id;meta.main int primary RAJ2000 Right Ascension of the optical counterpart (J2000) (RA) deg pos.eq.ra;meta.main DEJ2000 Declination of the optical counterpart (J2000) (DEC) deg pos.eq.dec;meta.main Dist Luminosity distance from the ALFALFA catalog (Dist) Mpc pos.distance float e_Dist Error in distance (e_Dist) Mpc stat.error float logM* Stellar mass (logMstar) (2) log(solMass) phys.mass;meta.modelled;arith double e_logM* Error in stellar mass (e_logMstar) log(solMass) stat.error double logMHI HI mass total (logMHI) (3) log(solMass) phys.mass;meta.modelled;arith float e_logMHI Error in HI mass (e_logMHI) log(solMass) stat.error double RHI HI size radius of HI disk (RHI) (4) kpc phys.size.radius;meta.modelled;arith float e_RHI Error in HI size (e_RHI) kpc stat.error float b/a Axis ratio in optical r-band image (b/a) phys.angSize;arith.ratio float i Optical inclination angle (incl) deg src.orbital.inclination;pos.posAng float e_i Error in inclination (e_incl) deg stat.error float logMdyn Dynamical mass within RHI (logMdyn) log(solMass) phys.mass;meta.modelled;arith float e_logMdyn Error in dynamical mass (e_logMdyn) log(solMass) stat.error double logMHIr HI mass enclosed within RHI (logMHI_rhi) log(solMass) phys.mass;meta.modelled;arith double logMDM Dark matter mass within R_HI (logMdm) (5) log(solMass) phys.mass;meta.modelled;arith float e_logMDM Error in dark matter mass (e_logMdm) log(solMass) stat.error double Haynes+2018 Display the ALFALFA data of Haynes 2011AJ....142..170H, Cat. J/AJ/142/170 meta.ref.url char Sloan Display the online SDSS-DR16 data for the nearest object meta.ref.url char
J/A+A/706/A64/tng2453 TNG100 galaxies with matched mock observations logMgasR Total gas mass within R_HI (Mgas_RHI) log(solMass) phys.mass;meta.modelled;arith double logMDMR Dark matter mass within R_HI (Mdm_RHI) log(solMass) phys.mass;meta.modelled;arith float logMdynR Total dynamical mass within R_HI (Mdyn_RHI) log(solMass) phys.mass;meta.modelled;arith double recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int IDsbHalo TNG100 subhalo ID (subhalo_id) meta.id IDgroup TNG100 group ID (group_id) meta.id int AGC The 1-to-1 Matched AGC number (matched_AGC) meta.id;meta.main Dist Luminosity distance from the ALFALFA catalog (Dist) Mpc pos.distance float Re Effective radius 3D (Re) kpc phys.size.radius;meta.modelled;arith float logM*5Re Stellar mass within 5Re (Mstar_5Re) log(solMass) phys.mass;meta.modelled;arith double RHI HI size defined by definition (RHI_defined) kpc phys.angSize double logMHI2.2R HI mass within 2.2 RHI defined (MHI_2.2RHI_defined) log(solMass) phys.mass;meta.modelled;arith double RHIw HI size estimated by Wang et al. (2016MNRAS.460.2143W, Cat. J/MNRAS/460/2143) (R_HI) kpc phys.size.radius;meta.modelled;arith float logM*R Stellar mass within R_HI (Mstar_RHI) log(solMass) phys.mass;meta.modelled;arith double b/a Projected axis ratio of r-band (b/a) phys.angSize;arith.ratio float logMdoR Mass for counterparts in dark-matter-only simulation (Mdark_only_RHI) log(solMass) phys.mass;meta.modelled;arith double Paxis LOS projection axis in TNG100 (project_axis) meta.code char i Inclination angle using Sanchez-Janssen et al. (2010) (incl) (1) deg pos.posAng float e_i Error on inclination (e_incl) deg stat.error float W85 Deprojected W85 HI linewidth of mock HI spectra (W85_cor3d) km/s spect.line.width;meta.modelled double e_W85 Error on W85 (e_W85_cor3d) km/s stat.error double Vrot Rotation velocity (Vrot) (2) km/s phys.veloc.rotat;meta.modelled;arith float e_Vrot Error on Vrot (e_Vrot) km/s stat.error float logMdynm Dynamical mass inferred from mock observation (Mdyn_mock) log(solMass) phys.mass;meta.modelled;arith double e_logMdynm Error on logMdynm (e_Mdyn_mock) log(solMass) stat.error double