5 papers
HD 38973 b -- a cold Saturn orbiting a Sun-like star
Adriana Errico, Robert A. Wittenmyer, Jonathan Horner +2
We report the detection of a long-period companion to the nearby solar-type star HD\,38973 using precision radial-velocity measurements. The radial-velocity data reveal a coherent…
Perhaps there is no brown dwarf desert? A study of sub-stellar companions with Gaia DR3
A. L. Wallace, A. R. Casey
The brown dwarf desert describes a range of orbital periods (<5 years) in which fewer brown dwarf-mass companions have been observed around Sun-like stars, when compared to planets…
Keplerian motion of a compact source orbiting the inner disc of PDS 70: a third protoplanet in resonance with b and c?
Iain Hammond, Valentin Christiaens, Daniel J. Price +10
The disc around PDS 70 hosts two directly imaged protoplanets in a gap. Previous VLT/SPHERE and recent James Webb Space Telescope/NIRCam observations have hinted at the presence of…
A Planet Candidate Orbiting near the Hot Jupiter TOI-2818 b Inferred through Transit Timing
Brendan J. McKee, Benjamin T. Montet, Samuel W. Yee +5
TOI-2818 b is a hot Jupiter orbiting a slightly evolved G-type star on a 4.04-day orbit that shows transit timing variations (TTVs) suggestive of a decreasing orbital period. In th…
Detection and Characterisation of Giant Planets with Gaia Astrometry
A. L. Wallace, A. R. Casey, A. G. A. Brown +1
Astrometric observations with Gaia are expected to play a valuable role in future exoplanet surveys. With current data from Gaia's third data release (DR3), we are sensitive to per…