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We study the detailed balance temperatures recorded along all classes ofstationary, uniformly accelerated worldlines in four-dimensional Minkowskispacetime, namely along (i) linear uniform acceleration, (ii) cusped, (iii)circular, (iv) catenary, and (v) helix worldlines, among which the Unruhtemperature is the particular case for linear uniform acceleration. As ameasuring device, we employ an Unruh-DeWitt detector, modeled as a qubit thatinteracts for a long time with a massless Klein-Gordon field in the vacuumstate. The temperatures in each case (i) - (v) are functions of up to threeinvariant quantities: curvature or proper acceleration, $\kappa$, torsion, $b$,and hypertorsion, $\nu$, and except for the case (i), they depend on thetransition frequency difference of the detector, $\omega$. We investigatenumerically the behavior of the frequency-dependent temperatures for differentvalues of $\kappa$, $b$, and $\nu$ along the stationary worldlines (ii) - (v)and evaluate analytically the regimes where the temperatures recorded along thedifferent worldlines coincide with each other in terms of relevant asymptoticlimits for $\kappa$, $b$, or $\nu$, and discuss their physical meaning. Wedemonstrate that the temperatures in cases (ii) - (v) dip under the Unruhtemperature at low frequencies and go above the Unruh temperature for large$|\omega|$. It is our hope that this study will be relevant to the design ofexperiments seeking to verify the Unruh effect or generalizations thereof.

Unruh-like effects: Effective temperatures along stationary worldlines