English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

We study the link between baryons and dark matter in 240 galaxies withspatially resolved kinematic data. Our sample spans 9 dex in stellar mass andincludes all morphological types. We consider (i) 153 late-type galaxies (LTGs;spirals and irregulars) with gas rotation curves from the SPARC database; (ii)25 early-type galaxies (ETGs; ellipticals and lenticulars) with stellar and HIdata from ATLAS^3D or X-ray data from Chandra; and (iii) 62 dwarf spheroidals(dSphs) with individual-star spectroscopy. We find that LTGs, ETGs, and"classical" dSphs follow the same radial acceleration relation: the observedacceleration (gobs) correlates with that expected from the distribution ofbaryons (gbar) over 4 dex. The relation coincides with the 1:1 line (no darkmatter) at high accelerations but systematically deviates from unity below acritical scale of ~10^-10 m/s^2. The observed scatter is remarkably small(<0.13 dex) and largely driven by observational uncertainties. The residuals donot correlate with any global or local galaxy property (baryonic mass, gasfraction, radius, etc.). The radial acceleration relation is tantamount to aNatural Law: when the baryonic contribution is measured, the rotation curvefollows, and vice versa. Including ultrafaint dSphs, the relation may extend byanother 2 dex and possibly flatten at gbar<10^-12 m/s^2, but these data aresignificantly more uncertain. The radial acceleration relation subsumes andgeneralizes several well-known dynamical properties of galaxies, like theTully-Fisher and Faber-Jackson relations, the "baryon-halo" conspiracies, andRenzo's rule.

One Law To Rule Them All: The Radial Acceleration Relation of Galaxies