New obliquity measurements for two Neptunes update the sample distribution to favor aligned systems plus a random component, resembling that of more massive planets and implying shared dynamical origins.
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The sky-projected obliquity of TOI-1259Ab is measured as λ = 6+21−22° and the true 3D obliquity as ψ = 24+14−12° (ψ < 48° at 95 % confidence), indicating a well-aligned orbit too wide for tidal realignment.
citing papers explorer
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POSEIDON I: The Dynamical Origins of Transiting Neptunes
New obliquity measurements for two Neptunes update the sample distribution to favor aligned systems plus a random component, resembling that of more massive planets and implying shared dynamical origins.
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TOI-1259Ab: A Warm Jupiter Orbiting a K-dwarf White-Dwarf Binary is on a Well-aligned Orbit
The sky-projected obliquity of TOI-1259Ab is measured as λ = 6+21−22° and the true 3D obliquity as ψ = 24+14−12° (ψ < 48° at 95 % confidence), indicating a well-aligned orbit too wide for tidal realignment.