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A complete reassessment of the HST observations of the transits of the extrasolar planet HD209458b has provided a transmission spectrum of the atmosphere over a wide range of wavelengths. Analysis of the NaI absorption line profile has…

地球与行星天体物理 · 物理学 2015-05-20 A. Vidal-Madjar , D. K. Sing , A. Lecavelier des Etangs , R. Ferlet , J. -M. Desert , G. Hebrard , I. Boisse , D. Ehrenreich , C. Moutou

The temperature distribution function (TDF) of X-ray clusters is derived for different normalizations of the HDM power spectrum in an Omega_0=1 universe using the statistics of peaks of a random Gaussian field. Concerning cluster formation…

天体物理学 · 物理学 2010-11-30 C. Balland , A. Blanchard

Nanoparticles (NPs) have proven their applicability in biosensing, drug delivery, and photo-thermal therapy, but their performance depends critically on the distribution and number of functional groups on their surface. When studying…

We propose conditional flows of the maximum mean discrepancy (MMD) with the negative distance kernel for posterior sampling and conditional generative modeling. This MMD, which is also known as energy distance, has several advantageous…

The dynamic properties of fluid, including density, surface tension, diffusivity and viscosity, are temperature-dependent and can significantly influence the flow dynamics of mesoscopic non-isothermal systems. To capture the correct…

计算物理 · 物理学 2020-07-21 Kaixuan Zhang , Jie Li , Shuo Chen , Yang Liu

In this paper, effect of physical parameters in presence of magnetic field on heat transfer and flow of third grade non-Newtonian Nanofluid in a porous medium with annular cross sectional analytically has been investigated. The viscosity of…

Nonthermal velocity distributions with much greater tails than the Maxwellian have been observed for radical atoms in plasmas for a long time. Historically, such velocity distributions have been modeled by a two-temperature Maxwell…

等离子体物理 · 物理学 2024-05-09 Keisuke Fujii

Numerical underflow and overflow are major hurdles for rolling-out the modeling and simulation infrastructure for temperatures below about 50 K. Extending the numeric precision is computationally intensive and thus best avoided. The root…

介观与纳米尺度物理 · 物理学 2022-12-06 Arnout Beckers

We investigate how the proton distribution function evolves when the protons undergo stochastic heating by strong, low-frequency, Alfv\'en-wave turbulence under the assumption that $\beta$ is small. We apply our analysis to protons…

太阳与恒星天体物理 · 物理学 2016-03-23 Kristopher G. Klein , Benjamin D. G. Chandran

Excitons play a key role for the optoelectronic properties of hybrid systems. We apply near-field scanning optical microscopy (NSOM) with a $100\,\text{-nm}$ spatial resolution to study the photoluminescence of surface excitons (SX) in a…

介观与纳米尺度物理 · 物理学 2015-03-31 Sebastian Friede , Sergei Kuehn , Sergey Sadofev , Sylke Blumstengel , Fritz Henneberger , Thomas Elsaesser

We present energy- and charge-resolved measurements of low and hyperthermal energy Na+ ions scattered from a Ag(001) surface. With the primary ion beam oriented along the [110] crystal direction, distinct peaks in the energy distributions…

介观与纳米尺度物理 · 物理学 2015-04-02 M. P. Ray , R. E. Lake , J. B. Marston , C. E. Sosolik

Direct atmospheric retrievals of exoplanets at high-resolution have recently allowed for a more detailed characterisation of their chemistry and dynamics from the ground. By monitoring the longitudinal distribution of species, as well as…

地球与行星天体物理 · 物理学 2024-07-03 Cathal Maguire , Neale P. Gibson , Stevanus K. Nugroho , Mark Fortune , Swaetha Ramkumar , Siddharth Gandhi , Ernst de Mooij

Nanoscopic diffusion at surfaces normally takes place when an adsorbate jumps from one adsorption site to the other. Jump diffusion can be measured via quasi-elastic scattering experiments, and the results can often be interpreted in terms…

计算物理 · 物理学 2021-05-18 Yaqing Xy Wang , Jack Kelsall , Nadav Avidor

The redshift-space correlation function $\xi_s$ for projected galaxy separations $\simless 1h^{-1}$ Mpc can be expressed as the convolution of the real-space correlation function with the galaxy pairwise velocity distribution function…

天体物理学 · 物理学 2009-10-28 Antonaldo Diaferio , Margaret J. Geller

We review different computational methods for the calculation of photoelectron spectra and angular distributions of atoms and molecules when excited by laser pulses using time-dependent density-functional theory (TDDFT) that are suitable…

化学物理 · 物理学 2017-03-28 Philipp Wopperer , Umberto De Giovannini , Angel Rubio

For distances less 10 nm, a total energy transfer occurs from a quantum emitter to a nearby metallic surface, producing evanescent surface waves that are plasmonic in nature. When investigating a metallic nanohole supported on an optically…

光学 · 物理学 2019-07-16 Amir Djalalian-Assl

This article proposes a derivation of the Vlasov-Navier-Stokes system for spray/aerosol flows. The distribution function of the dispersed phase is governed by a Vlasov-equation, while the velocity field of the propellant satisfies the…

偏微分方程分析 · 数学 2017-07-18 Etienne Bernard , Laurent Desvillettes , François Golse , Valeria Ricci

To study the temperature in a gas subjected to electromagnetic radiations, one may use the Radiative Transfer equations coupled with the Navier-Stokes equations. The problem has 7 dimensions; however with minimal simplifications it is…

The Ludwig-Soret effect, the migration of a species due to a temperature gradient, has been extensively studied without a complete picture of its cause emerging. Here we investigate the dynamics of DNA and spherical particles sub jected to…

材料科学 · 物理学 2009-11-13 Jennifer Kreft , Yeng-Long Chen

Long-timescale simulations of the diffusion of a H$_2$O admolecule on the (0001) basal plane of ice Ih were carried out over a temperature range of 100 to 200 K using the adaptive kinetic Monte Carlo method and TIP4P/2005f interaction…

计算物理 · 物理学 2015-08-04 Andreas Pedersen , Leendertjan Karssemeijer , Herma M. Cuppen , Hannes Jónsson