Evidence for Hidden Nearby Companions to Hot Jupiters

DH Wu, M Rice, S Wang - The Astronomical Journal, 2023 - iopscience.iop.org
The first discovered extrasolar worlds—giant," hot Jupiter" planets on short-period orbits—
came as a surprise to solar system–centric models of planet formation, prompting the …

Orbital alignment of the eccentric warm Jupiter TOI-677 b

E Sedaghati, A Jordán, R Brahm… - The Astronomical …, 2023 - iopscience.iop.org
Warm Jupiters lay out an excellent laboratory for testing models of planet formation and
migration. Their separation from the host star makes tidal reprocessing of their orbits …

TOI-5678b: A 48-day transiting Neptune-mass planet characterized with CHEOPS and HARPS

S Ulmer-Moll, HP Osborn, A Tuson, JA Egger… - Astronomy & …, 2023 - aanda.org
Context. A large sample of long-period giant planets has been discovered thanks to long-
term radial velocity surveys, but only a few dozen of these planets have a precise radius …

Ponderings on the Possible Preponderance of Perpendicular Planets

JC Siegel, JN Winn, SH Albrecht - The Astrophysical Journal …, 2023 - iopscience.iop.org
Misalignments between planetary orbits and the equatorial planes of their host stars are
clues about the formation and evolution of planetary systems. Earlier work found evidence …

Soles. vii. the spin–orbit alignment of wasp-106 b, a warm jupiter along the kraft break

J Wright, M Rice, XY Wang… - The Astronomical …, 2023 - iopscience.iop.org
Although close-orbiting, massive exoplanets—known as hot and warm Jupiters—are among
the most observationally accessible known planets, their formation pathways are still not …

Evidence for Low-level Dynamical Excitation in Near-resonant Exoplanet Systems

M Rice, XY Wang, S Wang, A Shporer… - The Astronomical …, 2023 - iopscience.iop.org
The geometries of near-resonant planetary systems offer a relatively pristine window into the
initial conditions of exoplanet systems. Given that near-resonant systems have likely …

Hot Jupiters Have Giant Companions: Evidence for Coplanar High-eccentricity Migration

JK Zink, AW Howard - The Astrophysical Journal Letters, 2023 - iopscience.iop.org
This study considers the characteristics of planetary systems with giant planets based on a
population-level analysis of the California Legacy Survey planet catalog. We identified three …

The spin–orbit misalignment of toi-1842b: The first measurement of the rossiter–mclaughlin effect for a warm sub-saturn around a massive star

K Hixenbaugh, XY Wang, M Rice… - The Astrophysical …, 2023 - iopscience.iop.org
The mechanisms responsible for generating spin–orbit misalignments in exoplanetary
systems are still not fully understood. It is unclear whether these misalignments are related …

Scaling K2. VI. Reduced Small-planet Occurrence in High-galactic-amplitude Stars

JK Zink, KK Hardegree-Ullman… - The Astronomical …, 2023 - iopscience.iop.org
In this study, we performed a homogeneous analysis of the planets around FGK dwarf stars
observed by the Kepler and K2 missions, providing spectroscopic parameters for 310 K2 …

The Orbital Architecture of Qatar-6: A Fully Aligned Three-body System?

M Rice, S Wang, K Gerbig, XY Wang, F Dai… - The Astronomical …, 2023 - iopscience.iop.org
The evolutionary history of an extrasolar system is, in part, fossilized through its planets'
orbital orientations relative to the host star's spin axis. However, spin–orbit constraints for …