What question did this study set out to answer?

To evaluate the population-level radial acceleration relation (RAR) in synthetic galaxies and its alignment with SPARC parameters.

March 3, 20260 citationsOpen Access

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Population-Level Radial Acceleration Relation in B': A Diagnostic Test

ACArturo CerezoPanama Canal Authority

Key Points

To evaluate the population-level radial acceleration relation (RAR) in synthetic galaxies and its alignment with SPARC parameters.
Performed population-level RAR test using 315 synthetic galaxies with varied mass, light ratios, and gas fractions.
Calculated observed gravitational acceleration (g_obs) versus baryonic gravitational acceleration (g_bar) for B' and B''.
Extracted effective knee acceleration (a_eff^knee) from the data.
Observed RAR scale approximated at a_0~1.2e-10 m/s^2.
SPARC best-fit parameters effectively reproduce observed RAR across the population of synthetic galaxies.

Abstract

We execute the population-level RAR test defined in Paper X. Using 315 synthetic galaxies (15 masses x 7 mass-to-light ratios x 3 gas fractions) with exponential disk profiles, we compute gₒbs vs gbar for B' and B'' and extract the effective knee acceleration aₑffᵏnee. The pipeline tests whether the SPARC best-fit parameters (beta=2. 676, X_*=5. 46e-57) reproduce the observed RAR scale a₀~1. 2e-10 m/s² as a population-level emergent phenomenon. Reproducible code included.

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Population-Level Radial Acceleration Relation in B': A Diagnostic Test

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Abstract

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