Benjamin J. Fulton
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View article: The Polar Orbit of TOI-2374 b, a Planet in the Neptunian Ridge
The Polar Orbit of TOI-2374 b, a Planet in the Neptunian Ridge Open
The “Neptunian ridge” is a recently identified peak in the frequency of planets with sizes between that of Neptune and Saturn orbiting their host stars with periods between 3 and 6 days. These planets may have formed similarly to their lar…
View article: No Giant Planets in the Eta Cassiopeiae System: Dynamical Implications of a Wide Binary Companion
No Giant Planets in the Eta Cassiopeiae System: Dynamical Implications of a Wide Binary Companion Open
Given the vast number of stars that exist within binary systems, it remains important to explore the effect of binary star environments on the formation and evolution of exoplanetary systems. Nearby binaries provide opportunities to charac…
View article: The Polar Orbit of TOI-2374 b, a Planet in the Neptunian Ridge
The Polar Orbit of TOI-2374 b, a Planet in the Neptunian Ridge Open
The ``Neptunian ridge'' is a recently identified peak in the frequency of planets with sizes between that of Neptune and Saturn orbiting their host stars with periods between 3 and 6 days (A. Castro-González et al. 2024). These planets may…
View article: No Giant Planets in the Eta Cassiopeiae System: Dynamical Implications of a Wide Binary Companion
No Giant Planets in the Eta Cassiopeiae System: Dynamical Implications of a Wide Binary Companion Open
Given the vast number of stars that exist within binary systems, it remains important to explore the effect of binary star environments on the formation and evolution of exoplanetary systems. Nearby binaries provide opportunities to charac…
View article: A New Approach to Compiling Exoatmospheric Target Lists and Quantifying the Ground-based Resources Needed to Vet Them
A New Approach to Compiling Exoatmospheric Target Lists and Quantifying the Ground-based Resources Needed to Vet Them Open
Transiting exoplanet atmospheric characterization is currently in a golden age as dozens of exoplanet atmospheres are being studied by NASA’s Hubble and James Webb Space Telescopes. This trend is expected to continue with NASA’s Pandora Sm…
View article: The highest mass Kepler red giants – II. Spectroscopic parameters, the amplitude–activity relation, and unexpected halo orbits
The highest mass Kepler red giants – II. Spectroscopic parameters, the amplitude–activity relation, and unexpected halo orbits Open
The high-mass (M$\,>\,$2 $\text{M}_{\odot }$) Kepler red giant stars are less well-studied than their lower mass counterparts. In the previous article, we presented a sample of 48 high-mass Kepler red giants and measured their asterosei…
View article: TOI-880 is an Aligned, Coplanar, Multiplanet System
TOI-880 is an Aligned, Coplanar, Multiplanet System Open
Although many cases of stellar spin–orbit misalignment are known, it is usually unclear whether a single planet’s orbit was tilted or if the entire protoplanetary disk was misaligned. Measuring stellar obliquities in multitransiting planet…
View article: The Compositions of Rocky Planets in Close-in Orbits Tend to Be Earth-like
The Compositions of Rocky Planets in Close-in Orbits Tend to Be Earth-like Open
Hundreds of exoplanets between 1 and 1.8 times the size of Earth have been discovered on close-in orbits. However, these planets show such a diversity in densities that some appear to be made entirely of iron, while others appear to host g…
View article: HD 35843: A Sun-like Star Hosting a Long-period Sub-Neptune and Inner Super-Earth
HD 35843: A Sun-like Star Hosting a Long-period Sub-Neptune and Inner Super-Earth Open
We report the discovery and confirmation of two planets orbiting the metal-poor Sun-like star HD 35843 (TOI 4189). HD 35843 c is a temperate sub-Neptune transiting planet with an orbital period of 46.96 days that was first identified by Pl…
View article: A Hot Jupiter with a Retrograde Orbit Around A Sun-like Star and a Toy Model of Hot Jupiters in Wide Binary Star Systems
A Hot Jupiter with a Retrograde Orbit Around A Sun-like Star and a Toy Model of Hot Jupiters in Wide Binary Star Systems Open
We report an observation of a transit of the hot Jupiter (HJ) KELT-23A b with the Keck Planet Finder spectrograph and a measurement of the sky-projected obliquity ( λ ) of its Sun-like ( T eff ≈ 5900 K) host star. We measured a projected s…
View article: Giant Outer Transiting Exoplanet Mass (GOT ‘EM) Survey. VI. Confirmation of a Long-period Giant Planet Discovered with a Single TESS Transit
Giant Outer Transiting Exoplanet Mass (GOT ‘EM) Survey. VI. Confirmation of a Long-period Giant Planet Discovered with a Single TESS Transit Open
We report the discovery and confirmation of TOI-4465 b, a 1.25 R J , 5.89 M J ± 0.26 M J giant planet orbiting a G dwarf star at d ≃ 122 pc. The planet was detected as a single-transit event in data from Sector 40 of the Tran…
View article: Stellar Obliquity of the Ultra-short-period Planet System HD 93963
Stellar Obliquity of the Ultra-short-period Planet System HD 93963 Open
We report an observation of the Rossiter–McLaughlin (RM) effect of the transiting planet HD 93963 Ac, a mini-Neptune planet orbiting a G0-type star with an orbital period of P c = 3.65 days, accompanied by an inner super-Earth planet with …
View article: The OATMEAL Survey. II. The 3D spin-orbit obliquity of an eccentric transiting brown dwarf in the Ruprecht 147 open cluster
The OATMEAL Survey. II. The 3D spin-orbit obliquity of an eccentric transiting brown dwarf in the Ruprecht 147 open cluster Open
We present new analysis of the CWW 89 system as part of the Orbital Architectures of Transiting Massive Exoplanets And Low-mass stars (OATMEAL) survey. The CWW 89 system is a member of the 2.8 Gyr old Ruprecht 147 (NGC 6774) cluster and fe…
View article: Data for paper "TOI-880 is an Aligned, Coplanar, Multi-planet System"
Data for paper "TOI-880 is an Aligned, Coplanar, Multi-planet System" Open
Although many cases of stellar spin-orbit misalignment are known, it is usually unclear whether a single planet's orbit was tilted or if the entire protoplanetary disk was misaligned. Measuring stellar obliquities in multi-transiting plane…
View article: The True Stellar Obliquity of a Sub-Saturn Planet from the <i>Tierras</i> Observatory and the Keck Planet Finder
The True Stellar Obliquity of a Sub-Saturn Planet from the <i>Tierras</i> Observatory and the Keck Planet Finder Open
We measure the true obliquity of TOI-2364, a K dwarf with a sub-Saturn-mass ( M p = 0.18 M J ) transiting planet on the upper edge of the hot-Neptune desert. We used new Rossiter–McLaughlin observations gathered with the Keck Planet Finder…
View article: Planet Masses, Radii, and Orbits from NASA’s K2 Mission
Planet Masses, Radii, and Orbits from NASA’s K2 Mission Open
We report the masses, sizes, and orbital properties of 86 planets orbiting 55 stars observed by NASA’s K2 Mission with follow-up Doppler measurements by the HIRES spectrometer at the W. M. Keck Observatory and the Automated Planet Finder a…
View article: The True Stellar Obliquity of a Sub-Saturn Planet from the Tierras Observatory and KPF
The True Stellar Obliquity of a Sub-Saturn Planet from the Tierras Observatory and KPF Open
We measure the true obliquity of TOI-2364, a K dwarf with a sub-Saturn-mass ($M_p = 0.18\,M_J$) transiting planet on the upper edge of the hot Neptune desert. We used new Rossiter-McLaughlin observations gathered with the Keck Planet Finde…
View article: K Dwarf Radius Inflation and a 10 Gyr Spin-down Clock Unveiled through Asteroseismology of HD 219134 from the Keck Planet Finder
K Dwarf Radius Inflation and a 10 Gyr Spin-down Clock Unveiled through Asteroseismology of HD 219134 from the Keck Planet Finder Open
We present the first asteroseismic analysis of the K3 V planet host HD 219134 based on four consecutive nights of radial velocities collected with the Keck Planet Finder. We apply Gold deconvolution to the power spectrum to disentangle mod…
View article: HD 35843: A Sun-like star hosting a long period sub-Neptune and inner super-Earth
HD 35843: A Sun-like star hosting a long period sub-Neptune and inner super-Earth Open
We report the discovery and confirmation of two planets orbiting the metal-poor Sun-like star, HD 35843 (TOI 4189). HD 35843 c is a temperate sub-Neptune transiting planet with an orbital period of 46.96 days that was first identified by P…
View article: TOI-6324 b: An Earth-mass Ultra-short-period Planet Transiting a Nearby M Dwarf
TOI-6324 b: An Earth-mass Ultra-short-period Planet Transiting a Nearby M Dwarf Open
We report the confirmation of TOI-6324 b, an Earth-sized (1.059 ± 0.041 R ⊕ ) ultra-short-period (USP) planet orbiting a nearby (∼20 pc) M dwarf. Using the newly commissioned Keck Planet Finder spectrograph, we have measured the mass of TO…
View article: The TESS–Keck Survey. XXIV. Outer Giants May Be More Prevalent in the Presence of Inner Small Planets
The TESS–Keck Survey. XXIV. Outer Giants May Be More Prevalent in the Presence of Inner Small Planets Open
We present the results of the Distant Giants Survey, a 3 yr radial velocity (RV) campaign to search for wide-separation giant planets orbiting Sun-like stars known to host an inner transiting planet. We defined a distant giant (DG) to have…
View article: An Obliquity Measurement of the Hot Neptune TOI-1694b
An Obliquity Measurement of the Hot Neptune TOI-1694b Open
We present spectral observations of the multiplanet host TOI-1694 during the transit of TOI-1694b, a 26.1 M ⊕ hot Neptune with a 3.77 day orbit. By analyzing radial velocities obtained from the Keck Planet Finder, we modeled the Rossiter–M…
View article: Discovery of a Jupiter Analog Misaligned to the Inner Planetary System in HD 73344
Discovery of a Jupiter Analog Misaligned to the Inner Planetary System in HD 73344 Open
We present the discovery of a Jupiter-like planet, HD 73344 d ( , au, ) based on 27 yr radial velocity (RV) observations from ELODIE, Lick/Hamilton, SOPHIE, APF, and HIRES. HD 73344 also h…
View article: Hidden in Plain Sight: Searching for Dark Companions to Bright Stars with the Large Binocular Telescope and SHARK-VIS
Hidden in Plain Sight: Searching for Dark Companions to Bright Stars with the Large Binocular Telescope and SHARK-VIS Open
We report the results from a pilot study to search for black holes and other dark companions in binary systems using direct imaging with SHARK-VIS and the iLocater pathfinder “Lili” on the Large Binocular Telescope. Starting from known sin…
View article: TOI-6324b: An Earth-Mass Ultra-Short-Period Planet Transiting a Nearby M Dwarf
TOI-6324b: An Earth-Mass Ultra-Short-Period Planet Transiting a Nearby M Dwarf Open
We report the confirmation of TOI-6324 b, an Earth-sized (1.059 $\pm$ 0.041 R$_\oplus$) ultra-short-period (USP) planet orbiting a nearby ($\sim$20 pc) M dwarf. Using the newly commissioned Keck Planet Finder (KPF) spectrograph, we have me…
View article: Precise and Accurate Mass and Radius Measurements of Fifteen Galactic Red Giants in Detached Eclipsing Binaries
Precise and Accurate Mass and Radius Measurements of Fifteen Galactic Red Giants in Detached Eclipsing Binaries Open
Precise and accurate mass and radius measurements of evolved stars are crucial to calibrating stellar models. Stars in detached eclipsing binaries (EBs) are excellent potential calibrators because their stellar parameters can be measured w…
View article: Planet Masses, Radii, and Orbits from NASA's K2 Mission
Planet Masses, Radii, and Orbits from NASA's K2 Mission Open
We report the masses, sizes, and orbital properties of 86 planets orbiting 55 stars observed by NASA's K2 Mission with follow-up Doppler measurements by the HIRES spectrometer at the W. M. Keck Observatory and the Automated Planet Finder a…
View article: K-dwarf Radius Inflation and a 10-Gyr Spin-down Clock Unveiled through Asteroseismology of HD 219134 from the Keck Planet Finder
K-dwarf Radius Inflation and a 10-Gyr Spin-down Clock Unveiled through Asteroseismology of HD 219134 from the Keck Planet Finder Open
We present the first asteroseismic analysis of the K3\,V planet host HD~219134, based on four consecutive nights of radial velocities collected with the Keck Planet Finder. We applied Gold deconvolution to the power spectrum to disentangle…
View article: A High-resolution Spectroscopic Survey of Directly Imaged Companion Hosts. I. Determination of Diagnostic Stellar Abundances for Planet Formation and Composition
A High-resolution Spectroscopic Survey of Directly Imaged Companion Hosts. I. Determination of Diagnostic Stellar Abundances for Planet Formation and Composition Open
We present the first results of an extensive spectroscopic survey of directly imaged planet host stars. The goal of the survey is the measurement of stellar properties and abundances of 15 elements (including C, O, and S) in these stars. I…
View article: HD 119130 b Is Not an “Ultradense” Sub-Neptune
HD 119130 b Is Not an “Ultradense” Sub-Neptune Open
We present a revised mass measurement for HD 119130 b (aka K2-292 b), a transiting planet ( P = 17 days, R p = R ⊕ ) orbiting a chromospherically inactive G dwarf, previously thought to be one of the densest sub-Neptunes known. O…