The Califa and Hipass velocity function for all morphological galaxy types

Abstract

The velocity function is a fundamental observable statistic of the galaxy population, similarly impor- tant as the luminosity function, but much more difficult to measure. In this work we present the first directly measured circular velocity function that is representative between 60 < v_circ < 320 km/s for galaxies of all morphological types at a given rotation velocity. For the low mass galaxy population (60 < v_circ < 170 km/s), we use the HIPASS velocity function. For the massive galaxy population (170 < v_circ < 320 km/s), we use stellar circular velocities from the Calar Alto Legacy Integral Field Area Survey (CALIFA). In earlier work we obtained the measurements of circular velocity at the 80% light radius for 226 galaxies and demonstrated that the CALIFA sample can produce volume- corrected galaxy distribution functions. The CALIFA velocity function includes homogeneous velocity measurements of both late and early-type rotation-supported galaxies and has the crucial advantage of not missing gas-poor massive ellipticals that HI surveys are blind to. We show that both velocity functions can be combined in a seamless manner, as their ranges of validity overlap. The resulting observed velocity function is compared to velocity functions derived from cosmological simulations of the z = 0 galaxy population. We find that dark matter-only simulations show a strong mismatch with the observed VF. Hydrodynamic simulations fare better, but still do not fully reproduce observations.

Accepted to ApJL. Keywords: Galaxies: kinematics and dynamics - galaxies: statistics - galaxies: evolution 7 pages, 3 figures

References in corpus (25)

• Simulating the joint evolution of quasars, galaxies and their large-scale distribution
• Introducing the Illustris Project: Simulating the coevolution of dark and visible matter in the Universe
• Properties of galaxies reproduced by a hydrodynamic simulation
• CALIFA, the Calar Alto Legacy Integral Field Area survey: I. Survey presentation
• Halos and galaxies in the standard cosmological model: results from the Bolshoi simulation
• PMAS, the Potsdam Multi-Aperture Spectrophotometer. I. Design, Manufacture, and Performance
• CALIFA: a diameter-selected sample for an integral field spectroscopy galaxy survey
• CALIFA, the Calar Alto Legacy Integral Field Area survey. II. First public data release
• CALIFA, the Calar Alto Legacy Integral Field Area survey. III. Second public data release
• The SAURON project - XII. Kinematic substructures in early-type galaxies: evidence for disks in fast rotators
• The 1000 Brightest HIPASS Galaxies: HI Mass Function and Omega_HI
• The velocity width function of galaxies from the 40% ALFALFA survey: shedding light on the cold dark matter overabundance problem
• Abundance of Field Galaxies
• The Disk Mass project; science case for a new PMAS IFU module
• Global Probes of the Impact of Baryons on Dark Matter Halos
• The Velocity Function of Galaxies
• NIHAO X: Reconciling the local galaxy velocity function with Cold Dark Matter via mock HI observations
• Measuring the Cosmic Equation of State with Counts of Galaxies II: Error Budget for the DEEP2 Redshift Survey
• The velocity function of gas-rich galaxies
• Measuring the Cosmic Equation of State with Counts of Galaxies
• Damn You, Little h! (or, Real-World Applications Of The Hubble Constant Using Observed And Simulated Data)
• Galaxy evolution from strong lensing statistics: the differential evolution of the velocity dispersion function in concord with the LambdaCDM paradigm
• The Cluster Galaxy Circular Velocity Function
• Confronting Cold Dark Matter Predictions with Observed Galaxy Rotations
• The Circular Velocity Function of Group Galaxies

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• Stellar kinematics across the Hubble sequence in the CALIFA survey: General properties and aperture corrections
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• The spatially-resolved star formation histories of CALIFA galaxies: Implications for galaxy formation
• How to Reconcile the Observed Velocity Function of Galaxies with Theory
• Hints against the cold and collisionless nature of dark matter from the galaxy velocity function
• Rotation curves and scaling relations of extremely massive spiral galaxies
• Another baryon miracle? Testing solutions to the "missing dwarfs" problem
• Resolution of the small scale structure issues with dissipative dark matter from multiple Standard Model sectors
• Constraining cosmology with the velocity function of low-mass galaxies
• The circular velocity and halo mass functions of galaxies in the nearby Universe
• Rotation curves and dynamical masses of MaNGA barred galaxies