Search Publications
A Transmission Spectrum of the Sub-Earth Planet L98-59 b in 1.1-1.7 µm
Kostov, Veselin B.; Barclay, Thomas; Schlieder, Joshua E. +20 more
With the increasing number of planets discovered by the Transit Exoplanet Survey Satellite, the atmospheric characterization of small exoplanets is accelerating. L98-59 is an M-dwarf hosting a multiplanet system, and so far, four small planets have been confirmed. The innermost planet b is ~15% smaller and ~60% lighter than Earth, and should thus …
Evidence for the Late Arrival of Hot Jupiters in Systems with High Host-star Obliquities
Schlaufman, Kevin C.; Hamer, Jacob H.
It has been shown that hot Jupiters systems with massive, hot stellar primaries exhibit a wide range of stellar obliquities. On the other hand, hot Jupiter systems with low-mass, cool primaries often have stellar obliquities close to zero. Efficient tidal interactions between hot Jupiters and the convective envelopes present in lower-mass main-seq…
The Lingering Death of Periodic Near-Sun Comet 323P/SOHO
Mutchler, Max; Kracht, Rainer; Tholen, David J. +4 more
We observed near-Sun comet 323P/SOHO for the first time using ground and space telescopes. In late 2020 December, the object was recovered at Subaru showing no cometary features on its way to perihelion. However, in our postperihelion observations, it developed a long narrow tail mimicking a disintegrated comet. The ejecta, composed of at least mi…
The TESS Grand Unified Hot Jupiter Survey. I. Ten TESS Planets
Henning, Thomas; Butler, R. Paul; Bieryla, Allyson +69 more
Hot Jupiters-short-period giant planets-were the first extrasolar planets to be discovered, but many questions about their origin remain. NASA's Transiting Exoplanet Survey Satellite (TESS), an all-sky search for transiting planets, presents an opportunity to address these questions by constructing a uniform sample of hot Jupiters for demographic …
An Eccentric Brown Dwarf Eclipsing an M dwarf
Cochran, William D.; Mahadevan, Suvrath; Monson, Andrew +16 more
We report the discovery of an M = 67 ± 2M J brown dwarf transiting the early M dwarf TOI-2119 on an eccentric orbit (e = 0.3362 ± 0.0005) at an orbital period of 7.200861 ± 0.000005 days. We confirm the brown dwarf nature of the transiting companion using a combination of ground-based and space-based photometry and high-precision veloci…
The Perkins INfrared Exosatellite Survey (PINES) I. Survey Overview, Reduction Pipeline, and Early Results
Muirhead, Philip S.; Theissen, Christopher; Bardalez Gagliuffi, Daniella C. +9 more
We describe the Perkins INfrared Exosatellite Survey (PINES), a near-infrared photometric search for short-period transiting planets and moons around a sample of 393 spectroscopically confirmed L- and T-type dwarfs. PINES is performed with Boston University's 1.8 m Perkins Telescope Observatory, located on Anderson Mesa, Arizona. We discuss the ob…
Validation and Improvement of the Pan-STARRS Photometric Calibration with the Stellar Color Regression Method
Yuan, Haibo; Xiao, Kai
As one of the best ground-based photometric data set, Pan-STARRS1 (PS1) has been widely used as the reference to calibrate other surveys. In this work, we present an independent validation and recalibration of the PS1 photometry using spectroscopic data from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) DR7, and photometri…
A Mirage or an Oasis? Water Vapor in the Atmosphere of the Warm Neptune TOI-674 b
Fortney, Jonathan J.; Mikal-Evans, Thomas; Lothringer, Joshua D. +14 more
We report observations of the recently discovered warm Neptune TOI-674 b (5.25 R ⊕, 23.6 M ⊕) with the Hubble Space Telescope's Wide Field Camera 3 instrument. TOI-674 b is in the Neptune desert, an observed paucity of Neptune-size exoplanets at short orbital periods. Planets in the desert are thought to have complex evolutio…
Kepler-1656b's Extreme Eccentricity: Signature of a Gentle Giant
Howard, Andrew W.; Angelo, Isabel; Naoz, Smadar +4 more
Highly eccentric orbits are one of the major surprises of exoplanets relative to the solar system and indicate rich and tumultuous dynamical histories. One system of particular interest is Kepler-1656, which hosts a sub-Jovian planet with an eccentricity of 0.8. Sufficiently eccentric orbits will shrink in the semimajor axis due to tidal dissipati…
Moderate-resolution K-band Spectroscopy of the Substellar Companion VHS 1256 b
Macintosh, Bruce; Perrin, Marshall D.; Barman, Travis S. +6 more
We present moderate-resolution (R ~ 4000) K-band spectra of the planetary-mass companion VHS 1256 b. The data were taken with the OSIRIS integral field spectrograph at the W.M. Keck Observatory. The spectra reveal resolved molecular lines from H2O and CO. The spectra are compared to custom PHOENIX atmosphere model grids appropriate for …