NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-19 T19:06:32 PDT
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For refcode 2013MNRAS.433L..30L:
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NED Abstract

Copyright by Royal Astronomical Society. 2013MNRAS.433L..30L A scaling relation for disc galaxies: circular-velocity gradient versus central surface brightness Lelli, Federico; Fraternali, Filippo; Verheijen, Marc Abstract. For disc galaxies, a close relation exists between the distribution of light and the shape of the rotation curve. We quantify this relation by measuring the inner circular-velocity gradient d_R_V(0) for spiral and irregular galaxies with high-quality rotation curves. We find that d_R_V(0) correlates with the central surface brightness mu_0_ over more than two orders of magnitude in d_R_V(0) and four orders of magnitudes in mu_0_. This is a scaling relation for disc galaxies. It shows that the central stellar density of a galaxy closely relates to the inner shape of the potential well, also for low-luminosity and low-surface-brightness galaxies that are expected to be dominated by dark matter. Key words: galaxies: kinematics and dynamics, galaxies: structure, dark matter
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