Search Results - "Millholland, Sarah"
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Tidally Induced Radius Inflation of Sub-Neptunes
Published in The Astrophysical journal (20-11-2019)“…Recent work suggests that many short-period super-Earth and sub-Neptune planets may have significant spin axis tilts ("obliquities"). When planets are locked…”
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Obliquity-driven sculpting of exoplanetary systems
Published in Nature astronomy (01-05-2019)“…NASA’s Kepler mission revealed that ~30% of Solar-type stars harbour planets with sizes between that of Earth and Neptune on nearly circular and coplanar…”
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Formation of Ultra-short-period Planets by Obliquity-driven Tidal Runaway
Published in The Astrophysical journal (01-12-2020)“…Small, rocky planets have been found orbiting in extreme proximity to their host stars, sometimes down to only ∼2 stellar radii. These ultra-short-period…”
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Formation of Close-in Neptunes around Low-mass Stars through Breaking Resonant Chains
Published in The Astrophysical journal (01-10-2024)“…Abstract Conventional planet formation theories predict a paucity of massive planets around small stars, especially very low-mass (0.1−0.3 M ⊙ ) mid-to-late M…”
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Inferred Properties of Planets in Mean-motion Resonances are Biased by Measurement Noise
Published in The Astronomical journal (01-10-2022)“…Abstract Planetary systems with mean-motion resonances hold special value in terms of their dynamical complexity and their capacity to constrain planet…”
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Can Cold Jupiters Sculpt the Edge-of-the-multis?
Published in The Astrophysical journal (01-09-2023)“…Abstract Compact systems of multiple close-in super-Earths/sub-Neptunes ( compact multis ) are a ubiquitous outcome of planet formation. It was recently…”
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Spin Dynamics of Planets in Resonant Chains
Published in The Astrophysical journal (01-02-2024)“…Abstract About a dozen exoplanetary systems have been discovered with three or more planets participating in a sequence of mean-motion resonances. The unique…”
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Polar Neptunes Are Stable to Tides
Published in The Astrophysical journal (01-10-2024)“…Abstract There is an intriguing and growing population of Neptune-sized planets with stellar obliquities near ∼90°. One previously proposed formation pathway…”
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Edge-of-the-Multis: Evidence for a Transition in the Outer Architectures of Compact Multiplanet Systems
Published in The Astronomical journal (01-08-2022)“…Abstract Although the architectures of compact multiple-planet systems are well characterized, there has been little examination of their “outer edges,” or the…”
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Self-consistent Spin, Tidal, and Dynamical Equations of Motion in the REBOUNDx Framework
Published in The Astrophysical journal (01-05-2023)“…Abstract We introduce self-consistent spin, tidal, and dynamical equations of motion into REBOUNDx , a library of additional effects for the popular N -body…”
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Tidal Dissipation Regimes among the Short-period Exoplanets
Published in Astrophysical journal. Letters (01-12-2023)“…Abstract The efficiency of tidal dissipation provides a zeroth-order link to a planet’s physical properties. For super-Earth and sub-Neptune planets in the…”
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The black hole low-mass X-ray binary V404 Cygni is part of a wide triple
Published in Nature (London) (23-10-2024)“…Evidence suggests that, when compact objects such as black holes and neutron stars form, they may receive a ‘natal kick’, during which the stellar remnant…”
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The Prevalence of Resonance Among Young, Close-in Planets
Published in The Astronomical journal (01-12-2024)“…Abstract Multiple planets undergoing disk migration may be captured into a chain of mean-motion resonances with the innermost planet parked near the disk’s…”
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TOI-1685 b Is a Hot Rocky Super-Earth: Updates to the Stellar and Planet Parameters of a Popular JWST Cycle 2 Target
Published in Astrophysical journal. Letters (01-08-2024)“…Abstract We present an updated characterization of the TOI-1685 planetary system, which consists of a P b = 0.69 day ultra-short-period super-Earth planet…”
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A 2:1 Mean-motion Resonance Super-Jovian Pair Revealed by TESS, FEROS, and HARPS
Published in Astrophysical journal. Letters (01-04-2023)“…Abstract We report the discovery of a super-Jovian 2:1 mean-motion resonance (MMR) pair around the G-type star TIC 279401253, whose dynamical architecture is a…”
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The Warm Neptune GJ 3470b Has a Polar Orbit
Published in Astrophysical journal. Letters (01-06-2022)“…The warm Neptune GJ 3470b transits a nearby (d = 29 pc) bright slowly rotating M1.5-dwarf star. Using spectroscopic observations during two transits with the…”
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Measured spin–orbit alignment of ultra-short-period super-Earth 55 Cancri e
Published in Nature astronomy (01-02-2023)“…A planet’s orbital alignment places important constraints on how a planet formed and consequently evolved. The dominant formation pathway of ultra-short-period…”
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Author Correction: Measured spin–orbit alignment of ultra-short-period super-Earth 55 Cancri e
Published in Nature astronomy (01-03-2023)Get full text
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Excitation of Planetary Obliquities through Planet-Disk Interactions
Published in The Astrophysical journal (10-05-2019)“…The tilt of a planet's spin axis off its orbital axis ("obliquity") is a basic physical characteristic that plays a central role in determining the planet's…”
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Tidal Inflation Reconciles Low-density Sub-Saturns with Core Accretion
Published in The Astrophysical journal (01-07-2020)“…While the solar system contains no planets between the sizes of Uranus and Saturn, our current exoplanet census includes several dozen such planets with…”
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