David R. Ciardi
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View article: Dynamical Architectures of S-type Transiting Planets in Binaries. II. A Dichotomy in Orbital Alignment of Small Planets in Close Binary Systems
Dynamical Architectures of S-type Transiting Planets in Binaries. II. A Dichotomy in Orbital Alignment of Small Planets in Close Binary Systems Open
Stellar multiplicity plays a crucial role in shaping planet formation and dynamical evolution. We present a survey of 54 TESS objects of interest (TOIs) within 300 pc that exhibit significant Hipparcos−Gaia astrometric accelerations. We id…
View article: THYME. XIII. Two Young Neptunes Orbiting a 75 Myr Star in the Alpha Persei Cluster
THYME. XIII. Two Young Neptunes Orbiting a 75 Myr Star in the Alpha Persei Cluster Open
Young planets with mass measurements are particularly valuable in studying atmospheric mass-loss processes, but these planets are rare and their masses difficult to measure due to stellar activity. We report the discovery of a planetary sy…
View article: Precise mass and radius determination for two new and one known Neptune-sized planets around G Dwarf hosts
Precise mass and radius determination for two new and one known Neptune-sized planets around G Dwarf hosts Open
As part of the KESPRINT collaboration, we present the discovery and characterization of three exoplanets in the sub-Neptune to super-Neptune regime, spanning key regions of the exo-Neptunian landscape. TOI-1472 c and TOI-1648 b are newly d…
View article: HWO Target Stars and Systems: A Prioritized Community List of Potential Stellar Targets for the Habitable Worlds Observatory’s ExoEarth Survey
HWO Target Stars and Systems: A Prioritized Community List of Potential Stellar Targets for the Habitable Worlds Observatory’s ExoEarth Survey Open
The HWO Target Stars and Systems 2025 (TSS25) list is a community-developed catalog of potential stellar targets for the Habitable Worlds Observatory (HWO) in its survey to directly image Earth-sized planets in the habitable zone. The TSS2…
View article: A planetary system with a sub-Neptune planet in the habitable zone of TOI-2093
A planetary system with a sub-Neptune planet in the habitable zone of TOI-2093 Open
Aims . We aim to confirm and measure the mass of the transiting planet candidate around the K5 V star TOI-2093, previously announced by the Transiting Exoplanet Survey Satellite (TESS) project. Methods . We combined photometric data from 3…
View article: THYME XIII: Two young Neptunes orbiting a 75-Myr star in the Alpha Persei Cluster
THYME XIII: Two young Neptunes orbiting a 75-Myr star in the Alpha Persei Cluster Open
Young planets with mass measurements are particularly valuable in studying atmospheric mass-loss processes, but these planets are rare and their masses difficult to measure due to stellar activity. We report the discovery of a planetary sy…
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 TESS Grand Unified Hot Jupiter Survey. III. Thirty More Giant Planets<sup>*</sup>
The TESS Grand Unified Hot Jupiter Survey. III. Thirty More Giant Planets<sup>*</sup> Open
We present the discovery of 30 transiting giant planets that were initially detected using data from NASA’s Transiting Exoplanet Survey Satellite mission. These new planets orbit relatively bright ( G ≤ 12.5) FGK host stars with orbital pe…
View article: <tt>MSTAT</tt>: A Python Tool for Estimating Spectral Types of Stellar Companions from Differential Photometry
MSTAT: A Python Tool for Estimating Spectral Types of Stellar Companions from Differential Photometry Open
A python-based tool for reading the table of absolute magnitudes for dwarf (O-Y) stars as compiled by M. J. Pecaut & E. E. Mamajek and using this table to determine the most likely spectral type for a companion star has been developed. The…
View article: A Pair of Dynamically Interacting Sub-Neptunes around TOI-6054
A Pair of Dynamically Interacting Sub-Neptunes around TOI-6054 Open
We confirm the planetary nature of a pair of transiting sub-Neptune exoplanets orbiting the bright F-type subgiant star TOI-6054 ( V = 8.02, K = 6.673) as a part of the OrCAS radial velocity survey using WIYN/NEID observations. We find tha…
View article: Validation of TESS Planet Candidates with Multicolor Transit Photometry and <tt>TRICERATOPS+</tt>
Validation of TESS Planet Candidates with Multicolor Transit Photometry and TRICERATOPS+ Open
We present an upgraded version of TRICERATOPS , a software package designed to calculate false positive probabilities for planet candidates identified by the Transiting Exoplanet Survey Satellite (TESS). This enhanced framework now incorpo…
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 NASA Exoplanet Archive and Exoplanet Follow-up Observing Program: Data, Tools, and Usage
The NASA Exoplanet Archive and Exoplanet Follow-up Observing Program: Data, Tools, and Usage Open
The NASA Exoplanet Archive (NEA) and the Exoplanet Follow-up Observing Program service are two widely used resources for the exoplanet community. The NEA provides a complete and accurate accounting of exoplanetary systems published by NASA…
View article: The Probable Direct-imaging Detection of the Stellar Companion to Betelgeuse
The Probable Direct-imaging Detection of the Stellar Companion to Betelgeuse Open
Betelgeuse—the closest M-supergiant to the Sun—has recently been predicted to host a lower-mass stellar companion that orbits the primary with a period of ∼6 yr. The putative stellar companion is thought to cause the long photometric modul…
View article: The Probable Direct-Imaging Detection of the Stellar Companion to Betelgeuse
The Probable Direct-Imaging Detection of the Stellar Companion to Betelgeuse Open
Betelgeuse -- the closest M-supergiant to the Sun -- has recently been predicted to host a lower-mass stellar companion that orbits the primary with a period of $\sim 6$ years. The putative stellar companion is thought to cause the long ph…
View article: Eleven New Transiting Brown Dwarfs and Very-low-mass Stars from TESS
Eleven New Transiting Brown Dwarfs and Very-low-mass Stars from TESS Open
We present the discovery of 11 new transiting brown dwarfs (BDs) and low-mass M dwarfs from NASA’s Transiting Exoplanet Survey Satellite (TESS) mission: TOI-2844, TOI-3122, TOI-3577, TOI-3755, TOI-4462, TOI-4635, TOI-4737, TOI-4759, TOI-52…
View article: The TESS Grand Unified Hot Jupiter Survey. III. Thirty More Giant Planets
The TESS Grand Unified Hot Jupiter Survey. III. Thirty More Giant Planets Open
We present the discovery of 30 transiting giant planets that were initially detected using data from NASA's Transiting Exoplanet Survey Satellite (TESS) mission. These new planets orbit relatively bright ($G \leq 12.5$) FGK host stars with…
View article: TOI-1846 b: a super-Earth in the radius valley orbiting a nearby M dwarf
TOI-1846 b: a super-Earth in the radius valley orbiting a nearby M dwarf Open
We present the discovery and validation of a super-Earth planet orbiting the M dwarf star TOI-1846 (TIC 198385543). The host star ($K_{\rm mag} = 9.6$) is located 47 pc away and has a radius of $R_\star = 0.41 \pm 0.01$$\rm \, R_\odot$, a …
View article: Nearly a decade of groundbreaking speckle interferometry at the international Gemini observatory
Nearly a decade of groundbreaking speckle interferometry at the international Gemini observatory Open
Since its inception, speckle interferometry has revolutionized high-resolution astronomical imaging, overcoming atmospheric challenges to achieve the diffraction limits of telescopes. Almost a decade ago, in 2018, a pair of speckle cameras…
View article: The NASA Exoplanet Archive and Exoplanet Follow-up Observing Program: Data, Tools, and Usage
The NASA Exoplanet Archive and Exoplanet Follow-up Observing Program: Data, Tools, and Usage Open
The NASA Exoplanet Archive and the Exoplanet Follow-up Observing Program service are two widely used resources for the exoplanet community. The NASA Exoplanet Archive provides a complete and accurate accounting of exoplanetary systems publ…
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: A Swarm of WASP Planets: Nine Giant Planets Identified by the WASP Survey
A Swarm of WASP Planets: Nine Giant Planets Identified by the WASP Survey Open
The Wide Angle Search for Planets (WASP) survey provided some of the first transiting hot Jupiter candidates. With the addition of the Transiting Exoplanet Survey Satellite (TESS), many WASP planet candidates have now been revisited and gi…
View article: A Disintegrating Rocky Planet with Prominent Comet-like Tails around a Bright Star
A Disintegrating Rocky Planet with Prominent Comet-like Tails around a Bright Star Open
We report the discovery of BD+05 4868 Ab, a transiting exoplanet orbiting a bright ( V = 10.16) K-dwarf (TIC 466376085) with a period of 1.27 days. Observations from NASA’s Transiting Exoplanet Survey Satellite reveal variable transit dept…
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: A Swarm of WASP Planets: Nine giant planets identified by the WASP survey
A Swarm of WASP Planets: Nine giant planets identified by the WASP survey Open
The Wide Angle Search for Planets (WASP) survey provided some of the first transiting hot Jupiter candidates. With the addition of the Transiting Exoplanet Survey Satellite (TESS), many WASP planet candidates have now been revisited and gi…
View article: Signatures of Atmospheric Mass Loss and Planet Migration in the Time Evolution of Short-period Transiting Exoplanets
Signatures of Atmospheric Mass Loss and Planet Migration in the Time Evolution of Short-period Transiting Exoplanets Open
Comparative studies of young and old exoplanet populations offer a glimpse into how planets may form and evolve with time. We present an occurrence rate study of short-period ( %) compared to the Gyr-old population observed by Kepl…
View article: Signatures of Atmospheric Mass Loss and Planet Migration in the Time Evolution of Short-Period Transiting Exoplanets
Signatures of Atmospheric Mass Loss and Planet Migration in the Time Evolution of Short-Period Transiting Exoplanets Open
Comparative studies of young and old exoplanet populations offer a glimpse into how planets may form and evolve with time. We present an occurrence rate study of short-period ($<$12 days) planets between 1.8--10 Rearth around 1374 FGK star…