Search Publications
Split Peas in a Pod: Intra-system Uniformity of Super-Earths and Sub-Neptunes
Winn, Joshua N.; Millholland, Sarah C.
The planets within compact multiplanet systems tend to have similar sizes, masses, and orbital period ratios, like "peas in a pod." This pattern was detected when considering planets with radii between 1 and 4 R⊕. However, these same planets show a bimodal radius distribution, with few planets between 1.5 and 2 R⊕. The smalle…
htof: A New Open-source Tool for Analyzing Hipparcos, Gaia, and Future Astrometric Missions
Dupuy, Trent J.; Brandt, Timothy D.; Li, Yiting +3 more
We present htof, an open-source tool for interpreting and fitting the intermediate astrometric data (IAD) from both the 1997 and 2007 reductions of Hipparcos, the scanning law of Gaia, and future missions such as the Nancy Grace Roman Space Telescope (NGRST). htof solves the astrometric parameters of any system for any arbitrary combination of abs…
Warm Jupiters in TESS Full-frame Images: A Catalog and Observed Eccentricity Distribution for Year 1
Hellier, Coel; Triaud, Amaury H. M. J.; Latham, David W. +57 more
Warm Jupiters-defined here as planets larger than 6 Earth radii with orbital periods of 8-200 days-are a key missing piece in our understanding of how planetary systems form and evolve. It is currently debated whether Warm Jupiters form in situ, undergo disk or high-eccentricity tidal migration, or have a mixture of origin channels. These differen…
KIC 5950759: a high-amplitude δ Sct star with amplitude and frequency modulation near the terminal age main sequence
Bowman, D. M.; Smalley, B.; Tkachenko, A. +5 more
Among the intermediate mass pulsating stars known as δ Sct stars is a subset of high-amplitude and predominantly radial-mode pulsators known as high-amplitude δ Sct (HADS) stars. From more than 2000 δ Sct stars observed by the Kepler space mission, only two HADS stars were detected. We investigate the more perplexing of these two HADS stars, KIC 5…
A New Sample of Warm Extreme Debris Disks from the ALLWISE Catalog
Henning, Thomas; Pál, András; Kinemuchi, Karen +12 more
Extreme debris disks (EDDs) are rare systems with peculiarly large amounts of warm dust that may stem from recent giant impacts between planetary embryos during the final phases of terrestrial planet growth. Here we report on the identification and characterization of six new EDDs. These disks surround F5-G9 type main-sequence stars with ages >…
Faint objects in motion: the new frontier of high precision astrometry
Villaver, Eva; Alves, João; Chemin, Laurent +83 more
Sky survey telescopes and powerful targeted telescopes play complementary roles in astronomy. In order to investigate the nature and characteristics of the motions of very faint objects, a flexibly-pointed instrument capable of high astrometric accuracy is an ideal complement to current astrometric surveys and a unique tool for precision astrophys…
Cross-correlation of Planck CMB lensing with DESI-like LRGs
White, Martin; Kitanidis, Ellie
Cross-correlations between the lensing of the cosmic microwave background (CMB) and other tracers of large-scale structure provide a unique way to reconstruct the growth of dark matter, break degeneracies between cosmology and galaxy physics, and test theories of modified gravity. We detect a cross-correlation between Dark Energy Spectroscopic Ins…
Molecular Line Observations in Two Dusty Star-forming Galaxies at z = 6.9
Greve, Thomas R.; Phadke, Kedar A.; Aravena, Manuel +18 more
SPT0311-58 is the most massive infrared luminous system discovered so far during the Epoch of Reionization (EoR). In this paper, we present a detailed analysis of the molecular interstellar medium at z = 6.9, through high resolution observations of the CO(6-5), CO(7-6), CO(10-9), [C I](2-1), and p-H2O(21,1 -20,2) l…
Molecules with ALMA at Planet-forming Scales (MAPS). XVII. Determining the 2D Thermal Structure of the HD 163296 Disk
Zhang, Ke; Wilner, David J.; Ménard, François +26 more
Understanding the temperature structure of protoplanetary disks is key to interpreting observations, predicting the physical and chemical evolution of the disk, and modeling planet formation processes. In this study, we constrain the two-dimensional thermal structure of the disk around the Herbig Ae star HD 163296. Using the thermochemical code RA…
Stellar clustering and orbital architecture of planetary systems
Adibekyan, V.; Sousa, S. G.; Barros, S. C. C. +9 more
Context. Revealing the mechanisms shaping the architecture of planetary systems is crucial for our understanding of their formation and evolution. In this context, it has been recently proposed that stellar clustering might be the key in shaping the orbital architecture of exoplanets.
Aims: The main goal of this work is to explore the factors…