Ben Cassese
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View article: A High-precision, Differentiable Code for Solar System Ephemerides
A High-precision, Differentiable Code for Solar System Ephemerides Open
We present jorbit , a python/ JAX library designed to enable modern data-driven numerical studies of the solar system. Written entirely in JAX , an autodifferentiable and optionally GPU accelerated language behind many current large-scale …
View article: The Dynamical History of HIP-41378 f—Oblique Exorings Masquerading as a Puffy Planet
The Dynamical History of HIP-41378 f—Oblique Exorings Masquerading as a Puffy Planet Open
The super-puff HIP-41378 f represents a fascinating puzzle due to its anomalously low density on a far-out orbit in contrast with other known super-puffs. In this work, we explore the hypothesis that HIP-41378 f is not in fact a low-densit…
View article: The democratic detrender: Ensemble-Based Removal of the Nuisance Signal in Stellar Time-Series Photometry
The democratic detrender: Ensemble-Based Removal of the Nuisance Signal in Stellar Time-Series Photometry Open
Accurate, precise, and computationally efficient removal of unwanted activity that exists as a combination of periodic, quasi-periodic, and non-periodic systematic trends in time-series photometric data is a critical step in exoplanet tran…
View article: The Dynamical History of HIP-41378 f -- Oblique Exorings Masquerading as a Puffy Planet
The Dynamical History of HIP-41378 f -- Oblique Exorings Masquerading as a Puffy Planet Open
The super-puff HIP-41378 f represents a fascinating puzzle due to its anomalously low density on a far-out orbit in contrast with other known super-puffs. In this work, we explore the hypothesis that HIP-41378 f is not in fact a low-densit…
View article: squishyplanet: modeling transits of non-sphericalexoplanets in JAX
squishyplanet: modeling transits of non-sphericalexoplanets in JAX Open
While astronomers often assume that exoplanets are perfect spheres when\nanalyzing observations, the subset of these distant worlds that are subject to\nstrong tidal forces and/or rapid rotations are expected to be distinctly\nellipsoidal …
View article: A Reply to: Large Exomoons unlikely around Kepler-1625 b and Kepler-1708 b
A Reply to: Large Exomoons unlikely around Kepler-1625 b and Kepler-1708 b Open
Recently, Heller & Hippke argued that the exomoon candidates Kepler-1625 b-i and Kepler-1708 b-i were allegedly 'refuted'. In this Matters Arising, we address these claims. For Kepler-1625 b, we show that their Hubble light curve is identi…
View article: Radial phase spirals in the Solar neighbourhood
Radial phase spirals in the Solar neighbourhood Open
The second data release of ESA’s Gaia mission revealed numerous signatures of disequilibrium in the Milky Way’s disc. These signatures are seen in the planar kinematics of stars, which manifest as ridges and ripples in R–vϕ, and in vertica…
View article: Spectroscopic Mapping of Io’s Surface with HST/STIS: SO<sub>2</sub> Frost, Sulfur Allotropes, and Large-scale Compositional Patterns
Spectroscopic Mapping of Io’s Surface with HST/STIS: SO<sub>2</sub> Frost, Sulfur Allotropes, and Large-scale Compositional Patterns Open
Io’s intense volcanic activity results in one of the most colorful surfaces in the solar system. Ultraviolet and visible-wavelength observations of Io are critical to uncovering the chemistry behind its volcanic hues. Here, we present glob…
View article: Kepler-1708 b-i is likely undetectable with HST
Kepler-1708 b-i is likely undetectable with HST Open
Data to accompany the paper "Kepler-1708 b-i is likely undetectable with HST", accepted to MNRAS. Paper available here: https://doi.org/10.1093/mnras/stac2090
View article: Kepler-1708 b-i is likely undetectable with <i>HST</i>
Kepler-1708 b-i is likely undetectable with <i>HST</i> Open
The exomoon candidate Kepler-1708 b-i was recently reported using two transits of Kepler data. Supported by a 1 per cent false-positive probability, the candidate is promising but requires follow-up observations to confirm/reject its valid…
View article: First Detections of Exop(lan)ets: Observations and Follow-Ups of the Floofiest Transits on Zoom
First Detections of Exop(lan)ets: Observations and Follow-Ups of the Floofiest Transits on Zoom Open
With the proliferation of online Zoom meetings as a means of doing science in the 2020s, astronomers have made new and unexpected Target of Opportunity (ToO) observations. Chief among these ToOs are observations of exop(lan)ets, or "exopet…