Search Publications
Three short-period Jupiters from TESS. HIP 65Ab, TOI-157b, and TOI-169b
Tamura, M.; Bouchy, F.; Henning, T. +74 more
We report the confirmation and mass determination of three hot Jupiters discovered by the Transiting Exoplanet Survey Satellite (TESS) mission: HIP 65Ab (TOI-129, TIC-201248411) is an ultra-short-period Jupiter orbiting a bright (V = 11.1 mag) K4-dwarf every 0.98 days. It is a massive 3.213 ± 0.078 MJ planet in a grazing transit configu…
The Lyman Alpha Reference Sample. X. Predicting Lyα Output from Star-forming Galaxies Using Multivariate Regression
Hayes, Matthew; Östlin, Göran; Melinder, Jens +4 more
Understanding the production and escape of Lyα radiation from star-forming galaxies is a long-standing problem in astrophysics. The ability to predict the Lyα luminosity of galaxies would open up new ways of exploring the epoch of reionization (EOR) and estimating Lyα emission from galaxies in cosmological simulations where radiative transfer calc…
Transits of Known Planets Orbiting a Naked-eye Star
Butler, R. Paul; Kristiansen, Martti H.; Vanderburg, Andrew +45 more
Some of the most scientifically valuable transiting planets are those that were already known from radial velocity (RV) surveys. This is primarily because their orbits are well characterized and they preferentially orbit bright stars that are the targets of RV surveys. The Transiting Exoplanet Survey Satellite (TESS) provides an opportunity to sur…
Molecular complexity in pre-stellar cores: a 3 mm-band study of L183 and L1544
Bizzocchi, Luca; Caselli, Paola; Vastel, Charlotte +4 more
Context. Pre-stellar cores (PSCs) are units of star formation. Besides representing early stages of the dynamical evolution leading to the formation of stars and planets, PSCs also provide a substrate for incipient chemical complexity in the interstellar space.
Aims: Our aim is to understand the influence of external conditions on the chemica…
The BepiColombo Mercury Imaging X-Ray Spectrometer: Science Goals, Instrument Performance and Operations
Bunce, Emma J.; Muinonen, Karri; Kallio, Esa +68 more
The Mercury Imaging X-ray Spectrometer is a highly novel instrument that is designed to map Mercury's elemental composition from orbit at two angular resolutions. By observing the fluorescence X-rays generated when solar-coronal X-rays and charged particles interact with the surface regolith, MIXS will be able to measure the atomic composition of …
Precise astrometry and diameters of asteroids from occultations - a data set of observations and their interpretation
Herald, David; Gault, David; Anderson, Robert +10 more
Occultations of stars by asteroids have been observed since 1961, increasing from a very small number to now over 500 annually. We have created and regularly maintain a growing data set of more than 5000 observed asteroidal occultations. The data set includes the raw observations, astrometry at the 1 mas level based on centre of mass or figure (no…
A SkyMapper view of the Large Magellanic Cloud: the dynamics of stellar populations
Lewis, Geraint F.; Ibata, Rodrigo A.; Mackey, Dougal +2 more
We present the first SkyMapper stellar population analysis of the Large Magellanic Cloud (hereafter LMC), including the identification of 3578 candidate Carbon Stars through their extremely red g - r colours. Coupled with Gaia astrometry, we analyse the distribution and kinematics of this Carbon Star population, finding the LMC to be centred at (R…
Location and Setting of the Mars InSight Lander, Instruments, and Landing Site
Golombek, M.; Warner, N. H.; Williams, N. +23 more
Knowing precisely where a spacecraft lands on Mars is important for understanding the regional and local context, setting, and the offset between the inertial and cartographic frames. For the InSight spacecraft, the payload of geophysical and environmental sensors also particularly benefits from knowing exactly where the instruments are located. A…
Moderate-resolution K-band Spectroscopy of Substellar Companion κ Andromedae b
Macintosh, Bruce; Barman, Travis S.; Marois, Christian +5 more
We present moderate-resolution (R ∼ 4000) K-band spectra of the "super-Jupiter," κ Andromedae b. The data were taken with the OSIRIS integral field spectrograph at Keck Observatory. The spectra reveal resolved molecular lines from H2O and CO, and are compared to a custom PHOENIX atmosphere model grid appropriate for young planetary-mass…
An Updated Visual Orbit of the Directly Imaged Exoplanet 51 Eridani b and Prospects for a Dynamical Mass Measurement with Gaia
Duchêne, Gaspard; Esposito, Thomas M.; Hom, Justin +51 more
We present a revision to the visual orbit of the young, directly imaged exoplanet 51 Eridani b using four years of observations with the Gemini Planet Imager. The relative astrometry is consistent with an eccentric (e={0.53}-0.13+0.09) orbit at an intermediate inclination (i={136}-11+10 °), although circ…