Exoplanets smaller than Neptune are common around red dwarf stars (M dwarfs), with those that transit their host star constituting the bulk of known temperate...
-
PublicationDensity, not radius, separates rocky and water-rich small planets orbiting M dwarf stars
-
PublicationDiscovery of a Low-Mass Brown Dwarf Companion of the Young Nearby Star G 196-3
A substellar-mass object in orbit at about 300 astronomical units (AU) from the young low-mass star G196-3 was detected by direct imaging. Optical and infrared...
-
PublicationDiscovery of Young, Isolated Planetary Mass Objects in the σ Orionis Star Cluster
We present the discovery by optical and near-infrared imaging of an extremely red, low-luminosity population of isolated objects in the young, nearby stellar...
-
PublicationEnsemble Asteroseismology of Solar-Type Stars with the NASA Kepler Mission
In addition to its search for extrasolar planets, the NASA Kepler mission provides exquisite data on stellar oscillations. We report the detections of...
-
PublicationEpisodes of particle ejection from the surface of the active asteroid (101955) Bennu
Active asteroids are those that show evidence of ongoing mass loss. We report repeated instances of particle ejection from the surface of (101955) Bennu...
-
PublicationFormation and evolution of carbonaceous asteroid Ryugu: Direct evidence from returned samples
Samples of the carbonaceous asteroid Ryugu were brought to Earth by the Hayabusa2 spacecraft. We analyzed seventeen Ryugu samples measuring 1-8 mm. CO2-bearing...
-
PublicationGalaxy Disruption in a Halo of Dark Matter
The relics of disrupted satellite galaxies have been found around the Milky Way and Andromeda, but direct evidence of a satellite galaxy in the early stages of...
-
PublicationGJ 367b: A dense, ultrashort-period sub-Earth planet transiting a nearby red dwarf star
Ultrashort-period (USP) exoplanets have orbital periods shorter than 1 day. Precise masses and radii of USP exoplanets could provide constraints on their...
-
PublicationGround-based detection of an extended helium atmosphere in the Saturn-mass exoplanet WASP-69b
Hot gas giant exoplanets can lose part of their atmosphere due to strong stellar irradiation, and these losses can affect their physical and chemical evolution...