Marginal posterior distributions of the magnetic field. Marginal probability distributions inferred using uniform (dot–dashed violet line), gamma (dashed orange line), and Gaussian (dotted teal line) magnetic-field priors from longitudinal oscillations in panels (A) Mazumder et al. (2020) and (B) Pan et al. (2025), with all distributions normalised to their maximum values. The direct solutions assume uniform priors on the electron number density, 𝒰(n_e,[cm⁻³]; 10⁹, 10¹¹). For the magnetic field, the priors 𝒰(B, [G];1, 70), γ(B; 3.6, 0.2), and 𝒢(B, [G];22.6, 11.9) are used for panel (A), while 𝒰(B, [G];1, 70), 𝒢(B, [G];5.1, 0.5), and γ(B; 100, 20) are adopted for panel (B).