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A Diverse Array of Fluvial Depositional Systems in Arabia Terra: Evidence for mid-Noachian to Early Hesperian Rivers on Mars
Williams, Rebecca M. E.; Fawdon, Peter; Grindrod, Peter M. +4 more
Branching to sinuous ridges systems, hundreds of kilometers in length and comprising layered strata, are present across much of Arabia Terra, Mars. These ridges are interpreted as depositional fluvial channels, now preserved as inverted topography. Here we use high-resolution image and topographic data sets to investigate the morphology of these d…
Far-infrared Properties of the Bright, Gravitationally Lensed Quasar J0439+1634 at z = 6.5
Fan, Xiaohui; Keeton, Charles R.; Walter, Fabian +11 more
We present IRAM NOrthern Extended Millimeter Array, James Clerk Maxwell Telescope/Submillimetre Common-User Bolometer Array-2 and Very Large Array (VLA) observations of the most distant known gravitationally lensed quasar, J0439+1634 at z = 6.5. We detect strong dust emission, [C II] 158 µm, [C I] 369 µm, [O I] 146 µm, CO(6-5), C…
Gaia DR 2 and VLT/FLAMES search for new satellites of the LMC
Carrera, R.; Fritz, T. K.; Battaglia, G. +1 more
A wealth of tiny galactic systems populates the surroundings of the Milky Way. However, some of these objects might have originated as former satellites of the Magellanic Clouds, in particular of the Large Magellanic Cloud (LMC). Examples of the importance of understanding how many systems are genuine satellites of the Milky Way or the LMC are the…
New criteria for the selection of galaxy close pairs from cosmological simulations: evolution of the major and minor merger fraction in MUSE deep fields
Inami, H.; Steinmetz, M.; Richard, J. +8 more
It remains a challenge to assess the merger fraction of galaxies at different cosmic epochs in order to probe the evolution of their mass assembly. Using the ILLUSTRIS cosmological simulation project, we investigate the relation between the separation of galaxies in a pair, both in velocity and projected spatial separation space, and the probabili…
Time variation of Jupiter's internal magnetic field consistent with zonal wind advection
Bolton, S. J.; Connerney, J. E. P.; Cao, H. +3 more
Determination of the time dependency (secular variation) of a planet's magnetic field provides a window into understanding the dynamo responsible for generating its field. However, of the six Solar System planets with active dynamos, secular variation has been firmly established only for Earth. Here, we compare magnetic field observations of Jupit…
The Mass of Stirring Bodies in the AU Mic Debris Disk Inferred from Resolved Vertical Structure
Hughes, A. Meredith; Carpenter, John; Wilner, David +9 more
The vertical distribution of dust in debris disks is sensitive to the number and size of large planetesimals dynamically stirring the disk, and is therefore well-suited for constraining the prevalence of otherwise unobservable Uranus and Neptune analogs. Information regarding stirring bodies has previously been inferred from infrared and optical o…
Catalog for the ESPRESSO blind radial velocity exoplanet survey
Rebolo, R.; Zapatero Osorio, M. R.; Poretti, E. +19 more
Aims: One of the main scientific drivers for ESPRESSO, Échelle SPectrograph, is the detection and characterization of Earth-class exoplanets. With this goal in mind, the ESPRESSO guaranteed time observations (GTO) Catalog identifies the best target stars for a blind search for the radial velocity (RV) signals caused by Earth-class exoplanets.…
Kepler-730: A Hot Jupiter System with a Close-in, Transiting, Earth-sized Planet
Schneider, Donald P.; Mahadevan, Suvrath; Majewski, Steven R. +9 more
Kepler-730 is a planetary system hosting a statistically validated hot Jupiter in a 6.49 day orbit and an additional transiting candidate in a 2.85 day orbit. We use spectroscopic radial velocities from the APOGEE-2N instrument, Robo-AO contrast curves, and Gaia distance estimates to statistically validate the planetary nature of the additional Ea…
A Hubble PanCET Study of HAT-P-11b: A Cloudy Neptune with a Low Atmospheric Metallicity
Nikolov, Nikolay; Mikal-Evans, Thomas; Sing, David K. +14 more
We present the first comprehensive look at the 0.35-5 µm transmission spectrum of the warm (∼800 K) Neptune HAT-P-11b derived from 13 individual transits observed using the Hubble and Spitzer Space Telescopes. Along with the previously published molecular absorption feature in the 1.1-1.7 µm bandpass, we detect a distinct absorption fe…
Kepler-411: a four-planet system with an active host star
Schmitt, J. H. M. M.; Wang, X.; Ioannidis, P. +3 more
We present a detailed characterization of the Kepler-411 system (KOI 1781). This system was previously known to host two transiting planets: one with a period of 3 days (R = 2.4 R⊕; Kepler-411b) and one with a period of 7.8 days (R = 4.4 R⊕; Kepler-411c), as well as a transiting planetary candidate with a 58-day period (R = 3…