37 citations · 111 across the 17 of their papers we have counts for
17 papers
The Mysterious Inspiral of WASP-12b: Why Obliquity Tides Cannot Drive Orbital Decay
Caleb Lammers, Yubo Su, Joshua N. Winn
WASP-12b's orbit is decaying, for unknown reasons. The planet's period is shrinking more rapidly than can be attributed to equilibrium tides or dynamical tides in a main-sequence s…
Constraining Tidal Migration with the Hot Jupiter Population
Linhao Ma, Yubo Su, Samuel W. Yee +3
Hot Jupiters with orbital periods shorter than a few days have probably been affected by tidal orbital migration. We develop an analytical framework for constraining tidal migratio…
POSEIDON III: The Aligned Orbit of the Hot Neptune Around the Hot Star WASP-195
Juan I. Espinoza-Retamal, Joshua N. Winn, Rafael Brahm +33
Stellar obliquities provide important clues as to the formation and migration histories of planetary systems, but measurements remain scarce for Neptune-mass planets, especially th…
Constraining the Planetary Obliquity Distribution of Warm Jupiters
Caleb Lammers, Joshua N. Winn
Warm Jupiters are an intriguing class of planets with uncertain origins. Their planetary obliquities could help distinguish between different formation pathways: planet-planet scat…
POSEIDON II: The Anti-Aligned Orbit of the Warm Neptune TOI-1710 A b
Juan I. Espinoza-Retamal, Hareesh Bhaskar, Joshua N. Winn +7
We present an observation of the Rossiter-McLaughlin effect for the TOI-1710 system with the NEID spectrograph on the WIYN 3.5 m telescope. The system hosts a warm Neptune ($P\sim2…
TTV-Not-So-Fast: Uniqueness and Degeneracy in Perturbing Planet Parameters
Caleb Lammers, Joshua N. Winn
Nontransiting planets can reveal themselves through transit timing variations (TTVs), but inferring the properties of the perturbing planet is a highly degenerate inverse problem.…
On the Exoplanet Yield of Gaia Astrometry
Caleb Lammers, Joshua N. Winn
We re-examine the expected yield of Gaia astrometric planet detections using updated models for giant-planet occurrence, the local stellar population, and Gaia's demonstrated astro…
Unexpected Near-Resonant and Metastable States of Young Multi-Planet Systems
Zhecheng Hu, Fei Dai, Wei Zhu +4
Recent observations suggest that the incidence of near-resonant planets declines as planetary systems age, making young planetary systems key signposts of early dynamical evolution…
The Gap-Giant Association: Are Planets Hiding in the Gaps?
Caleb Lammers, Joshua N. Winn
A handful of stars are known to host both an inner system of multiple transiting planets and an outer giant planet. These systems all feature a prominent gap between the orbits of…
Discovery and Dynamics of the Nontransiting Planet Kepler-139f
Caleb Lammers, Joshua N. Winn
Among the ways that an outer giant planet can alter the architecture of an inner planetary system is by tilting the orbits of the inner planets and reducing their mutual transit pr…
Accelerating Giant Impact Simulations with Machine Learning
Caleb Lammers, Miles Cranmer, Sam Hadden +3
Constraining planet formation models based on the observed exoplanet population requires generating large samples of synthetic planetary systems, which can be computationally prohi…
Slow Rotation for the Super-Puff Planet Kepler-51d
Caleb Lammers, Joshua N. Winn
Super-puffs are low-density planets of unknown origin and composition. If they form by accreting nebular gas through a circumplanetary disk, one might expect super-puffs to be spin…
The six-planet resonant chain of HD 110067
Caleb Lammers, Joshua N. Winn
HD 110067 is the brightest star known to have six transiting planets. Each adjacent pair of planets has a period ratio that is nearly equal to a ratio of small integers, suggesting…
The instability mechanism of compact multiplanet systems
Caleb Lammers, Sam Hadden, Norman Murray
To improve our understanding of orbital instabilities in compact planetary systems, we compare suites of -body simulations against numerical integrations of simplified dynamical…
Intra-system uniformity: a natural outcome of dynamical sculpting
Caleb Lammers, Sam Hadden, Norman Murray
There is evidence that exoplanet systems display intra-system uniformity in mass, radius, and orbital spacing (like ``peas in a pod'') when compared with the system-to-system varia…
AGN Feedback in SDSS-IV MaNGA: AGNs have Suppressed Central Star Formation Rates
Caleb Lammers, Kartheik G. Iyer, Hector Ibarra-Medel +4
Despite the importance of feedback from active galactic nuclei (AGNs) in models of galaxy evolution, observational constraints on the influence of AGN feedback on star formation re…
Candidate high-redshift protoclusters and lensed galaxies in the Planck list of high-z sources overlapping with Herschel-SPIRE imaging
Caleb Lammers, Ryley Hill, Seunghwan Lim +3
The Planck list of high-redshift source candidates (the PHz catalogue) contains 2151 peaks in the cosmic infrared background, unresolved by Planck's 5 arcmin beam. Follow-up spectr…