NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-07-23 T10:09:32 PDT
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For refcode 2012MNRAS.427.3176C:
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Copyright by Royal Astronomical Society. 2012MNRAS.427.3176C Newtonian acceleration scales in spiral galaxies Cardone, V. F.; Del Popolo, A. Abstract. We revisit the issue of the constancy of the dark matter (DM) and baryonic Newtonian acceleration scales within the DM scale radius by considering a large sample of late-type galaxies. We rely on a Markov Chain Monte Carlo method to estimate the parameters of the halo model and the stellar mass-to-light ratio and then propagate the uncertainties from the rotation curve data to the estimate of the acceleration scales. This procedure allows us to compile a catalogue of 58 objects with estimated values of the B-band absolute magnitude M_B_, the virial mass M_vir_, and the DM and baryonic Newtonian accelerations (denoted as g_DM_(r_0_) and g_bar_(r_0_), respectively) within the scale radius r_0_ which we use to investigate whether it is possible to define a universal acceleration scale. We find a weak but statistically meaningful correlation with M_vir_ thus making us argue against the universality of the acceleration scales. However, the results somewhat depend on the sample adopted so that a careful analysis of selection effects should be carried out before any definitive conclusion can be drawn. Key words: galaxies: kinematics and dynamics, galaxies: spiral, dark matter
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