[DSRP Evidence](https://dsrpevidence.org/)

# Rotational broadening of exoplanet spectra in arbitrarily oriented systems: Application to reflected light

Vaughan et al., 2026, Astronomy & Astrophysics — Astronomy

Patterns: [Relationships](https://dsrpevidence.org/pattern/relationships), [Perspectives](https://dsrpevidence.org/pattern/perspectives)

## In short

The same physical planet yields a substantially different measured signal purely as a function of the geometric vantage point from which it is observed, with the broadening kernel coupled to that orientation.

## What they found (results)

Deriving rotational-broadening kernels for arbitrarily oriented star-planet systems, the authors find the reflected-light spectrum of a non-aligned system's broadening differs from a prograde-aligned system's by roughly 50%.

These researchers were not testing DSRP. The finding is theirs; the correspondence to DSRP is drawn by this site.

[Source](https://doi.org/10.1051/0004-6361/202661714)