Search Results - "Waalkes, William C."
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Quantifying the Transit Light Source Effect: Measurements of Spot Temperature and Coverage on the Photosphere of AU Microscopii with High-resolution Spectroscopy and Multicolor Photometry
Published in The Astrophysical journal (01-02-2024)“…Abstract AU Microscopii (AU Mic) is an active 24 ± 3 Myr pre-main-sequence M dwarf in the stellar neighborhood ( d = 9.7 pc) with a rotation period of 4.86…”
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TOI 762 A b and TIC 46432937 b: Two Giant Planets Transiting M-dwarf Stars
Published in The Astronomical journal (01-11-2024)“…Abstract We present the discovery of TOI 762 A b and TIC 46432937 b, two giant planets transiting M-dwarf stars. Transits of both systems were first detected…”
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A Low-mass, Pre-main-sequence Eclipsing Binary in the 40 Myr Columba Association—Fundamental Stellar Parameters and Modeling the Effect of Star Spots
Published in The Astronomical journal (01-02-2023)“…Abstract Young eclipsing binaries (EBs) are powerful probes of early stellar evolution. Current models are unable to simultaneously reproduce the measured and…”
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Early Release Science of the exoplanet WASP-39b with JWST NIRISS
Published in Nature (London) (23-02-2023)“…The Saturn-mass exoplanet WASP-39b has been the subject of extensive efforts to determine its atmospheric properties using transmission spectroscopy 1 – 4 …”
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The Transiting Exoplanet Community Early Release Science Program for JWST
Published in Publications of the Astronomical Society of the Pacific (01-11-2018)“…The James Webb Space Telescope (JWST) presents the opportunity to transform our understanding of planets and the origins of life by revealing the atmospheric…”
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A Possible Alignment Between the Orbits of Planetary Systems and their Visual Binary Companions
Published in The Astronomical journal (01-05-2022)“…Abstract Astronomers do not have a complete picture of the effects of wide-binary companions (semimajor axes greater than 100 au) on the formation and…”
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The Discovery and Follow-up of Four Transiting Short-period Sub-Neptunes Orbiting M Dwarfs
Published in The Astronomical journal (01-06-2024)“…Abstract Sub-Neptunes with radii of 2–3 R ⊕ are intermediate in size between rocky planets and Neptune-sized planets. The orbital properties and bulk…”
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Identification of carbon dioxide in an exoplanet atmosphere
Published in Nature (London) (23-02-2023)“…Carbon dioxide (CO2) is a key chemical species that is found in a wide range of planetary atmospheres. In the context of exoplanets, CO2 is an indicator of the…”
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Wide Binary Orbits are Preferentially Aligned with the Orbits of Small Planets, but Probably Not Hot Jupiters
Published 16-05-2024“…Studying the relative orientations of the orbits of exoplanets and wide-orbiting binary companions (semimajor axis greater than 100 AU) can shed light on how…”
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TOI 762 A b and TIC 46432937 b: Two Giant Planets Transiting M Dwarf Stars
Published 09-07-2024“…We present the discovery of TOI 762 A b and TIC 46432937 b, two giant planets transiting M dwarf stars. Transits of both systems were first detected from…”
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A Low-mass, Pre-main-sequence Eclipsing Binary in the 40 Myr Columba Association -- Fundamental Stellar Parameters and Modeling the Effect of Star Spots
Published 21-12-2022“…Young eclipsing binaries (EBs) are powerful probes of early stellar evolution. Current models are unable to simultaneously reproduce the measured and derived…”
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Journal Article -
12
Early Release Science of the exoplanet WASP-39b with JWST NIRISS
Published 18-11-2022“…Transmission spectroscopy provides insight into the atmospheric properties and consequently the formation history, physics, and chemistry of transiting…”
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Lyman-alpha in the GJ 1132 System: Stellar Emission and Planetary Atmospheric Evolution
Published 10-06-2019“…The Astronomical Journal, Volume 158, No. 1, 2019 GJ 1132b, which orbits an M dwarf, is one of the few known Earth-sized planets, and at 12 pc away it is one…”
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Identification of carbon dioxide in an exoplanet atmosphere
Published 24-08-2022“…Carbon dioxide (CO2) is a key chemical species that is found in a wide range of planetary atmospheres. In the context of exoplanets, CO2 is an indicator of the…”
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A Possible Alignment Between the Orbits of Planetary Systems and their Visual Binary Companions
Published 31-01-2022“…Astronomers do not have a complete picture of the effects of wide-binary companions (semimajor axes greater than 100 AU) on the formation and evolution of…”
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TOI 122b and TOI 237b, two small warm planets orbiting inactive M dwarfs, found by \textit{TESS}
Published 29-10-2020“…We report the discovery and validation of TOI 122b and TOI 237b, two warm planets transiting inactive M dwarfs observed by \textit{TESS}. Our analysis shows…”
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Vetting of 384 TESS Objects of Interest with TRICERATOPS and Statistical Validation of 12 Planet Candidates
Published 03-02-2020“…We present TRICERATOPS, a new Bayesian tool that can be used to vet and validate TESS Objects of Interest (TOIs). We test the tool on 68 TOIs that have been…”
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The Transiting Exoplanet Community Early Release Science Program for JWST
Published 03-09-2018“…The James Webb Space Telescope (JWST) presents the opportunity to transform our understanding of planets and the origins of life by revealing the atmospheric…”
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Journal Article