Search Results - "Rice, Malena"
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Inferring Stellar Parameters from Iodine-imprinted Keck/HIRES Spectra with Machine Learning
Published in Astrophysical journal. Letters (01-01-2024)“…Abstract The properties of exoplanet host stars are traditionally characterized through a detailed forward-modeling analysis of high-resolution spectra…”
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The Orbital Geometries and Stellar Obliquities of Exoplanet-hosting Multistar Systems
Published in The Astronomical journal (01-03-2024)“…Abstract The current orbital geometries of exoplanet systems offer a fossilized record of the systems’ dynamical histories. A particularly rich set of…”
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Evidence for Hidden Nearby Companions to Hot Jupiters
Published in The Astronomical journal (01-04-2023)“…Abstract The first discovered extrasolar worlds—giant, “hot Jupiter” planets on short-period orbits—came as a surprise to solar system–centric models of planet…”
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SOLES. VII. The Spin–Orbit Alignment of WASP-106 b, a Warm Jupiter along the Kraft Break
Published in The Astronomical journal (01-12-2023)“…Abstract Although close-orbiting, massive exoplanets—known as hot and warm Jupiters—are among the most observationally accessible known planets, their…”
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Aligning Planet-hosting Binaries via Dissipative Precession in Circumstellar Disks
Published in The Astrophysical journal (01-09-2024)“…Abstract Recent observations have demonstrated that some subsets of even moderately wide-separation planet-hosting binaries are preferentially configured such…”
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SOLES XII. The Aligned Orbit of TOI-2533 b, a Transiting Brown Dwarf Orbiting an F8-type Star
Published in The Astronomical journal (01-10-2024)“…Abstract Brown dwarfs occupy a middle ground in mass space between gaseous giant planets and ultracool dwarf stars, and the characterisation of their orbital…”
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The Spin–Orbit Misalignment of TOI-1842b: The First Measurement of the Rossiter–McLaughlin Effect for a Warm Sub-Saturn around a Massive Star
Published in Astrophysical journal. Letters (01-06-2023)“…Abstract The mechanisms responsible for generating spin–orbit misalignments in exoplanetary systems are still not fully understood. It is unclear whether these…”
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The Orbital Architecture of Qatar-6: A Fully Aligned Three-body System?
Published in The Astronomical journal (01-02-2023)“…Abstract The evolutionary history of an extrasolar system is, in part, fossilized through its planets’ orbital orientations relative to the host star’s spin…”
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Evidence for Primordial Alignment: Insights from Stellar Obliquity Measurements for Compact Sub-Saturn Systems
Published in The Astronomical journal (01-09-2024)“…Abstract Despite decades of effort, the mechanisms by which the spin axis of a star and the orbital axes of its planets become misaligned remain elusive. In…”
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Scaling K2. VI. Reduced Small-planet Occurrence in High-galactic-amplitude Stars
Published in The Astronomical journal (01-06-2023)“…Abstract In this study, we performed a homogeneous analysis of the planets around FGK dwarf stars observed by the Kepler and K2 missions, providing…”
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The PFS View of TOI-677 b: A Spin–Orbit Aligned Warm Jupiter in a Dynamically Hot System
Published in The Astronomical journal (01-04-2024)“…Abstract TOI-677 b is part of an emerging class of “tidally detached” gas giants ( a / R ⋆ ≳ 11) that exhibit large orbital eccentricities and yet low stellar…”
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A Tale of Two Peas in a Pod: The Kepler-323 and Kepler-104 Systems
Published in The Astronomical journal (01-04-2024)“…Abstract In order to understand the relationship between planet multiplicity, mass, and composition, we present newly measured masses of five planets in two…”
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TOI-561 b: A Low-density Ultra-short-period “Rocky” Planet around a Metal-poor Star
Published in The Astronomical journal (01-03-2023)“…Abstract TOI-561 is a galactic thick-disk star hosting an ultra-short-period (0.45-day-orbit) planet with a radius of 1.37 R ⊕ , making it one of the most…”
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TESS Giants Transiting Giants. IV. A Low-density Hot Neptune Orbiting a Red Giant Star
Published in The Astronomical journal (01-07-2024)“…Hot Neptunes, gaseous planets smaller than Saturn (∼3–8 R⊕) with orbital periods less than 10 days, are rare. Models predict this is due to high-energy stellar…”
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Evidence for Low-level Dynamical Excitation in Near-resonant Exoplanet Systems
Published in The Astronomical journal (01-12-2023)“…Abstract The geometries of near-resonant planetary systems offer a relatively pristine window into the initial conditions of exoplanet systems. Given that…”
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Octofitter: Fast, Flexible, and Accurate Orbit Modeling to Detect Exoplanets
Published in The Astronomical journal (01-10-2023)“…Abstract As next-generation imaging instruments and interferometers search for planets closer to their stars, they must contend with increasing orbital motion…”
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Spectropolarimetry of the Thermonuclear Supernova SN 2021rhu: High Calcium Polarization 79 Days after Peak Luminosity
Published in The Astrophysical journal (01-11-2022)“…Abstract We report spectropolarimetric observations of the Type Ia supernova (SN) SN 2021rhu at four epochs: −7, +0, +36, and +79 days relative to its B -band…”
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TESS Giants Transiting Giants. III. An Eccentric Warm Jupiter Supports a Period−Eccentricity Relation for Giant Planets Transiting Evolved Stars
Published in The Astronomical journal (01-02-2023)“…Abstract The fate of planets around rapidly evolving stars is not well understood. Previous studies have suggested that, relative to the main-sequence…”
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TOI-1859b: A 64 Day Warm Jupiter on an Eccentric and Misaligned Orbit
Published in Astrophysical journal. Letters (01-07-2023)“…Abstract Warm Jupiters are close-in giant planets with relatively large planet–star separations (i.e., 10 < a / R ⋆ < 100). Given their weak tidal interactions…”
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Investigating the Atmospheric Mass Loss of the Kepler-105 Planets Straddling the Radius Gap
Published in The Astronomical journal (01-02-2024)“…Abstract An intriguing pattern among exoplanets is the lack of detected planets between approximately 1.5 R ⊕ and 2.0 R ⊕ . One proposed explanation for this…”
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