Results 31 to 40 of about 15,535 (284)

Why an intrinsic magnetic field does not protect a planet against atmospheric escape

, 2018
The presence or absence of a magnetic field determines the nature of how a planet interacts with the solar wind and what paths are available for atmospheric escape.
Gunell, H., Hamrin, M., De Keyser, J., Nilsson, H., Stenberg Wieser, G., Slapak, R., Maggiolo, R., Lindkvist, J.   +7 more
core   +2 more sources

RRS James Clark Ross Cruise 269B, 07-24 Jul 2012, Reykjavik – Reykjavik. Arctic hydrate dissociation as a consequence of climate change: determining the vulnerable methane reservoir and gas escape mechanisms [PDF]

, 2013
Cruise JR269B was the second part of a two-leg geophysical programme led by a science party from the School of Ocean and Earth Science, University of Southampton, and carried out on the western margin of the Svalbard archipelago.
et al, ., et al,, Sinha, M.C.
core  

Exploring Curvature Effects in Direct‐Written 3D Curved Hollow Magnetic Nanoshells

Advanced Functional Materials, EarlyView.
Fabricated by a hybrid FEBID/CVD method, 3D PtC/Co3Fe core–shell heterostructures with engineered curvature and shell thickness exhibit complex reversal modes with axially symmetric N'eel‐type domain walls. XMCD‐PEEM combined with full‐scale micromagnetic simulations reveal how curvature and thickness govern the domain wall energy landscape and shape ...
Oleksii M. Volkov, Fabrizio Porrati, Florian Kronast, Riccardo Hertel, Pavlo Makushko, Olha Bezsmertna, Alexander Kuprava, Mohamad‐Assaad Mawass, Sven Barth, Michael Huth, Denys Makarov   +10 more
wiley   +1 more source

Modeling magnesium escape from HD 209458b atmosphere [PDF]

Astronomy & Astrophysics, 2014
Transit observations in the MgI line of HD209458b revealed signatures of neutral magnesium escaping the upper atmosphere of the planet, while no atmospheric absorption was found in the MgII doublet. Here we present a 3D particle model of the dynamics of neutral and ionized magnesium populations, coupled with an analytical modeling of the atmosphere ...
Bourrier, V., Lecavelier Des Etangs, A., Vidal-Madjar, A.   +2 more
openaire   +3 more sources

The high-energy environment and atmospheric escape of the mini-Neptune K2-18 b

, 2020
K2-18 b is a transiting mini-Neptune that orbits a nearby (38 pc), cool M3 dwarf and is located inside its region of temperate irradiation. We report on the search for hydrogen escape from the atmosphere K2-18 b using Lyman-α transit spectroscopy with ...
Vincent Bourrier, Dr. Astudillo-Defru, Nicola, Bonfils, Xavier, Bourrier, Vincent, Stéphane Udry, Christophe Lovis, Pepe, Francesco, Ehrenreich, David, Forget, François, Astudillo-Defru, Nicola, dos Santos, Leonardo,, Nicola Astudillo-Defru, François Forget, Leonardo A. dos Santos, Xavier Bonfils, David Ehrenreich, Lovis, Christophe, Francesco Pepe, Udry, Stéphane, dos Santos, Leonardo, A, dos Santos, Leonardo A.   +20 more
core   +1 more source

Intrinsic Photoactive Star ZnPc–Poly(glutamate) Nanoplatforms for Multimodal Glioblastoma Therapy and Brain‐Targeted Delivery

Advanced Functional Materials, EarlyView.
An intrinsic photoactive star‐shaped zinc phtalocyanine‐poly(L‐glutamic acid) (ZnPc‐PGA) nanoplatform for multimodal glioblastoma (GBM) therapy and brain‐targeted elivery. A ZnPc‐PGA‐based multifunctional theranostic nanocarrier platform enables image‐guided, multimodal GBM therapy. ZnPc‐PGA nanocarriers support the integration of fluorescence imaging,
Amina Benaicha‐Fernández, Teodora Ranđelović, Ana Armiñán, Víctor Sebastián, Manuel Fuentes, Cristián Huck‐Iriart, Esther Masiá, Paula Carrascosa‐Marco, Pablo Juanes‐Velasco, Snežana Đorđević, Clara Bayona, Ignacio Ochoa, Maria Medel, Inmaculada Conejos‐Sánchez, María J. Vicent   +14 more
wiley   +1 more source

The Response of Planetary Atmospheres to the Impact of Icy Comets. III. Impact Driven Atmospheric Escape

The Astrophysical Journal
In an Earth-analogue atmosphere, water vapor is a key carrier of hydrogen in the lower atmosphere. The vertical transport of water to above the tropopause is one of the primary control valves on the atmospheric hydrogen escape rate.
F. Sainsbury-Martinez, G. Cooke, C. Walsh   +2 more
doaj   +1 more source

On the escape of CH₄ from Pluto's atmosphere [PDF]

Geophysical Research Letters, 2015
AbstractWe adapted a multispecies escape model, developed for close‐in extrasolar planets, to calculate the escape rates of CH4 and N2 from Pluto. In the absence of escape, CH4 should overtake N2 as the dominant species below the exobase. The CH4 profile depends strongly on the escape rate, however, and the typical escape rates predicted for Pluto lead
Koskinen, T. T., Erwin, J. T., Yelle, R. V.   +2 more
openaire   +2 more sources

3D Printing Innovations in Polymeric Porous and Patterned Architecture

Advanced Functional Materials, EarlyView.
Polymeric foams occupy a unique structural space between dense solids and open networks, where engineered void fraction governs mechanical compliance, thermal resistance, and mass transport. Additive manufacturing now enables precise spatial control over cellular architecture, unlocking designer foam structures across applications spanning crash ...
Dhanush Patil, Sri Vaishnavi Thummalapalli, Clarissa Westover, Arunachalam Ramanathan, M. Taylor Sobzcak, Roumika Patil, Qixuan Xiang, Tiantian Li, Sui Yang, Timothy E. Long, Hongyue Sun, Xianqiao Wang, Yang Liu, Kenan Song   +13 more
wiley   +1 more source

Thermally Driven Atmospheric Escape: Transition from Diffusion-limited to Drag-off Escape

The Planetary Science Journal
We examine the transition from diffusion-limited to drag-off escape using a direct simulation Monte Carlo (DSMC) model developed to simulate planetary atmospheres, referred to as Harrah.
Jack C. Evans, Shane Robert Carberry Mogan, Robert E. Johnson, Orenthal J. Tucker   +3 more
doaj   +1 more source