Results 81 to 90 of about 282,229 (301)
Advanced Functional Materials, EarlyView.A monolayer graphene/phosphoric‐acid mixed proton‐electron conducting membrane combines proton‐conducting nanoconfined acid channels with electron‐conducting graphene nanosheets for efficient high‐temperature hydrogen purification. The membrane achieves nearly 100% H2/CO2 selectivity and 69 GPU hydrogen permeance at 250°C, arising from synergistic ...
Kaiqiang He +8 more
wiley +1 more source
High-energy irradiation and mass loss rates of hot Jupiters in the solar neighborhood
, 2015 Giant gas planets in close proximity to their host stars experience strong irradiation. In extreme cases photoevaporation causes a transonic, planetary wind and the persistent mass loss can possibly affect the planetary evolution. We have identified nine
Czesla, S. +3 more
core +1 more source
Properties and occurrence rates of $Kepler$ exoplanet candidates as a function of host star metallicity from the DR25 catalog [PDF]
, 2018 Correlations between the occurrence rate of exoplanets and their host star properties provide important clues about the planet formation processes. We studied the dependence of the observed properties of exoplanets (radius, mass, and orbital period) as a
Banyal, R. K. +7 more
core +4 more sources
AGB Mass-Loss History & Haloes Around Planetary Nebulae [PDF]
Symposium - International Astronomical Union, 2003 Ionized haloes around planetary nebulae (PNe) are a quite common phenomenon, being found in about 70% of the elliptical PNe for which adequately deep images exist (cf. Corradi, these proceedings). Physically, one has to distinguish between two different kind of haloes.
Corradi, Romano L.M. +3 more
openaire +2 more sources
Advanced Materials, EarlyView.This review systematically summarizes recent advances in porosity engineering of MXenes, with a focused discussion on their structure‐governed energy storage properties. A critical analysis of structure–property relationships is presented across alkali‐ion batteries, multivalent‐ion batteries, and supercapacitors.
Shude Liu +8 more
wiley +1 more source
The evolving spectrum of the planetary nebula Hen 2-260
, 2014 We analysed the planetary nebula Hen 2-260 using optical spectroscopy and photometry. We compared our observations with the data from literature to search for evolutionary changes.
Gesicki, K. +5 more
core +1 more source
A Double Planetary System around the Evolved Intermediate-Mass Star HD 4732 [PDF]
, 2012 We report the detection of a double planetary system orbiting around the evolved intermediate-mass star HD 4732 from precise Doppler measurements at Okayama Astrophysical Observatory (OAO) and Anglo-Australian Observatory (AAO). The star is a K0 subgiant
Ando, Hiroyasu +12 more
core +2 more sources
AN INCREASE IN THE MASS OF PLANETARY SYSTEMS AROUND LOWER-MASS STARS [PDF]
The Astrophysical Journal, 2015 Trends in the planet population with host star mass provide an avenue to constrain planet formation theories. We derive the planet radius distribution function for Kepler stars of different spectral types, sampling a range in host star masses. We find that M dwarf stars have 3.5 times more small planets (1.0-2.8 R_Earth) than main-sequence FGK stars ...
Gijs D. Mulders +2 more
openaire +2 more sources
Advanced Materials, EarlyView.This study reports the fabrication of MRI‐compatible elastomeric micro‐balloons via a multi‐step bubble casting process, where the monolithic elastomeric wall is selectively stiffened for reversible and controlled inflation and elasticity, depending on the target vessels for graded occlusion of cerebral arteries.
Jong Bin Kim +10 more
wiley +1 more source
A sixth mass extinction? Why planetary health matters
The Lancet Planetary Health, 2017 doaj +3 more sources