Results 81 to 90 of about 4,034,717 (373)

Two empirical regimes of the planetary mass-radius relation [PDF]

open access: yes, 2017
Today, with the large number of detected exoplanets and improved measurements, we can reach the next step of planetary characterization. Classifying different populations of planets is not only important for our understanding of the demographics of ...
D. Bashi   +3 more
semanticscholar   +1 more source

Print‐and‐Plate Architected Electrodes for Electrochemical Transformations Under Flow

open access: yesAdvanced Functional Materials, EarlyView.
Typical flow cell electrodes are composed of stochastic porous carbon, limiting understanding of electrode structure‐performance relationships. This work describes an approach, termed “print‐and‐plate,” to prepare porous electrodes by direct ink writing followed by conformal metal coating.
Dylan M. Barber   +12 more
wiley   +1 more source

SIMP J013656.5+093347 Is Likely a Planetary-mass Object in the Carina-Near Moving Group [PDF]

open access: yes, 2017
We report on the discovery that the nearby (∼6 pc) photometrically variable T2.5 dwarf SIMP J013656.5+093347 is a likely member of the ∼200 Myr old Carina-Near moving group with a probability of >99.9% based on its full kinematics.
J. Gagn'e   +8 more
semanticscholar   +1 more source

Multi-Planet Destabilisation and Escape in Post-Main Sequence Systems [PDF]

open access: yes, 2013
Discoveries of exoplanets orbiting evolved stars motivate critical examinations of the dynamics of $N$-body systems with mass loss. Multi-planet evolved systems are particularly complex because of the mutual interactions between the planets.
Hadjidemetriou, John D.   +3 more
core   +1 more source

Ideal Molecular Sieving with a Dense MOF for Helium Upgrading with Highly Diffusion Selective Mixed Matrix Membranes

open access: yesAdvanced Functional Materials, EarlyView.
The separation of Helium gas from natural gas is challenging but highly important. MIL‐116(Ga), a “non‐porous” metal–organic framework is used as a molecular sieve to separate He from CH4. Druse‐like MIL‐116(Ga) particles are integrated into polysulfone mixed matrix membranes.
Ayisha Komal   +10 more
wiley   +1 more source

Effects of Planetary Mass Uncertainties on the Interpretation of the Reflectance Spectra of Earth-like Exoplanets

open access: yesThe Astronomical Journal
Atmospheric characterization of Earth-like exoplanets through reflected light spectroscopy is a key goal for upcoming direct imaging missions. A critical challenge in this endeavor is the accurate determination of planetary mass, which may influence the ...
Mario Damiano   +4 more
doaj   +1 more source

Quantifying the Impact of the Dust Torque on the Migration of Low-mass Planets

open access: yesThe Astrophysical Journal, 2023
Disk solids are critical in many planet formation processes; however, their effect on planet migration remains largely unexplored. Here we assess this important issue for the first time by building on the systematic measurements of dust torques on an ...
Octavio M. Guilera   +3 more
doaj   +1 more source

An extrasolar planetary system with three Neptune-mass planets [PDF]

open access: yesNature, 2006
Over the past two years, the search for low-mass extrasolar planets has led to the detection of seven so-called 'hot Neptunes' or 'super-Earths' around Sun-like stars. These planets have masses 5-20 times larger than the Earth and are mainly found on close-in orbits with periods of 2-15 days.
Lovis, Christophe   +13 more
openaire   +6 more sources

A Survey For Planetary-mass Brown Dwarfs in the Taurus and Perseus Star-forming Regions [PDF]

open access: yes, 2017
We present the initial results from a survey for planetary-mass brown dwarfs in the Taurus star-forming region. We have identified brown dwarf candidates in Taurus using proper motions and photometry from several ground- and space-based facilities ...
T. Esplin, K. Luhman
semanticscholar   +1 more source

PSYM-WIDE: A Survey for Large-separation Planetary-mass Companions to Late Spectral Type Members of Young Moving Groups [PDF]

open access: yesAstronomical Journal, 2017
We present the results of a direct imaging survey for very large separation (>100 au), low-mass companions around 95 nearby young K5–L5 stars and brown dwarfs.
M. Naud   +29 more
semanticscholar   +1 more source

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