Results 71 to 80 of about 121,687 (300)

White dwarf planets

open access: yesEPJ Web of Conferences, 2013
The recognition that planets may survive the late stages of stellar evolution, and the prospects for finding them around White Dwarfs, are growing. We discuss two aspects governing planetary survival through stellar evolution to the White Dwarf stage ...
Bonsor Amy   +4 more
doaj   +1 more source

Interpreting the yield of transit surveys: Are there groups in the known transiting planets population? [PDF]

open access: yes, 2009
Each transiting planet discovered is characterized by 7 measurable quantities, that may or may not be linked together (planet mass, radius, orbital period, and star mass, radius, effective temperature, and metallicity).
Alonso   +51 more
core   +3 more sources

Bulk and Surface Reactivity of LiNi0.5Mn1.5O4 in Contact with (Acidic) Water

open access: yesAdvanced Energy and Sustainability Research, EarlyView.
The comprehensive investigation of the influence of (acidic) water on LiNi0.5Mn1.5O4 as cobalt‐free lithium‐ion battery cathode material reveals that such treatment particularly affects a very thin layer at the particle surface, while the bulk material remains unaffected.
Annika R. Schuer   +16 more
wiley   +1 more source

Giant Outer Transiting Exoplanet Mass (GOT ‘EM) Survey. VI. Confirmation of a Long-period Giant Planet Discovered with a Single TESS Transit

open access: yesThe Astronomical Journal
We report the discovery and confirmation of TOI-4465 b, a 1.25 R _J ${}_{-0.07{R}_{{\rm{J}}}}^{+0.08{R}_{{\rm{J}}}}$ , 5.89 M _J  ± 0.26 M _J giant planet orbiting a G dwarf star at d  ≃ 122 pc.
Zahra Essack   +83 more
doaj   +1 more source

The Gemini Planet Imager Exoplanet Survey: Giant Planet and Brown Dwarf Demographics From 10-100 AU

open access: yes, 2019
We present a statistical analysis of the first 300 stars observed by the Gemini Planet Imager Exoplanet Survey (GPIES). This subsample includes six detected planets and three brown dwarfs; from these detections and our contrast curves we infer the ...
Ammons, S. Mark   +65 more
core   +3 more sources

The interplay between X-ray photoevaporation and planet formation [PDF]

open access: yes, 2013
We assess the potential of planet formation instigating the early formation of a photoevaporation driven gap, up to radii larger than typical for photoevaporation alone.
Armitage, Philip J.   +3 more
core   +2 more sources

Field‐Directed Growth of Hematite for Advanced Solar Hydrogen Production

open access: yesAdvanced Energy and Sustainability Research, EarlyView.
Magnetic field‐assisted chemical vapor deposition enables controlled anisotropic growth of hematite nanostructures, boosting photoelectrochemical performance and ensuring 100 h stability for solar water oxidation reaction. This study employs photoelectrochemistry not only as a performance metric but also as a probing tool to reveal how magnetic field ...
Fabio A. Pires   +5 more
wiley   +1 more source

Modeling Planetary System Formation with N-Body Simulations: Role of Gas Disk and Statistics Comparing to Observations

open access: yes, 2011
During the late stage of planet formation when Mars-size cores appear, interactions among planetary cores can excite their orbital eccentricities, speed their merges and thus sculpture the final architecture of planet systems.
Andrews   +38 more
core   +1 more source

Band‐Edge Engineering of BiFeO3–KTaO3 Solid Solutions toward Efficient Solar Hydrogen Production

open access: yesAdvanced Energy and Sustainability Research, EarlyView.
This study reports BiFeO3–KTaO3 solid solutions as efficient photocathodes for solar hydrogen production. Combining experiments with density functional theory, the authors demonstrate composition‐driven band‐edge tuning, achieving high photocurrent density and hydrogen generation rates.
Yassine Nassereddine   +5 more
wiley   +1 more source

Planet Hunters NGTS: New Planet Candidates from a Citizen Science Search of the Next Generation Transit Survey Public Data

open access: yesThe Astronomical Journal
We present the results from the first two years of the Planet Hunters Next Generation Transit Survey (NGTS) citizen science project, which searches for transiting planet candidates in data from the NGTS by enlisting the help of members of the general ...
Sean M. O’Brien   +38 more
doaj   +1 more source

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