Results 91 to 100 of about 35,353 (312)
Radiative accelerations on iron using Opacity Project data
The Astrophysical Journal, 1993 Radiative accelerations have been calculated in detail for iron in main-sequence models with T eff =6700, 8000, and 10,000 K and log g=4.0 and 4.3 and a number of Fe abundances. Atomic data for Fe IX to Fe XVII were taken from the Opacity Project, and this allowed us to calculate the accelerations over an important fraction of the envelope and to ...
G. Alecian, G. Michaud, J. Tully
openaire +1 more source
HELIOS-K: AN ULTRAFAST, OPEN-SOURCE OPACITY CALCULATOR FOR RADIATIVE TRANSFER [PDF]
The Astrophysical Journal, 2015 We present an ultrafast opacity calculator that we name HELIOS-K. It takes a line list as an input, computes the shape of each spectral line and provides an option for grouping an enormous number of lines into a manageable number of bins. We implement a combination of Algorithm 916 and Gauss-Hermite quadrature to compute the Voigt profile, write the ...
Simon L. Grimm, Kevin Heng
openaire +2 more sources
Hydrogel Thermostat Inspired by Photoprotective Foliage Using Latent and Radiative Heat Control
Advanced Materials, EarlyView.Guided by Populus alba foliage, this hydrogel latent‐radiative thermostat (LRT) actively balances latent and radiative heat fluxes. An LRT switches solar reflectance, maintains high mid‐IR emissivity, and reversibly evaporates/regenerates water, while titanium oxide (TiO2) nanoparticles toughen the film.
Se‐Yeon Heo +15 more
wiley +1 more source
On the Spectrum and Polarization of Magnetar Flare Emission
Galaxies, 2018 Bursts and flares are among the distinctive observational manifestations of magnetars, isolated neutron stars endowed with an ultra-strong magnetic field ( B ≈ 10 14 – 10 15 G).
Roberto Taverna, Roberto Turolla
doaj +1 more source
, 2012 We propose that the growth of supermassive black holes is associated mainly with brief episodes of highly super-Eddington infall of gas ("hyperaccretion"). This gas is not swallowed in real time, but forms an envelope of matter around the black hole that
Begelman +16 more
core +1 more source
3D LTE spectral line formation with scattering in red giant stars [PDF]
, 2011 We investigate the effects of coherent isotropic continuum scattering on the formation of spectral lines in local thermodynamic equilibrium (LTE) using 3D hydrodynamical and 1D hydrostatic model atmospheres of red giant stars.
Allen de Prieto +56 more
core +2 more sources
Role of the Recombination Zone in Organic Light‐Emitting Devices
Advanced Materials, EarlyView.This review summarizes the critical role of the recombination zone in organic light‐emitting diodes (OLEDs). We highlight that broadening the recombination zone in OLEDs based on emissive layers with balanced charge transport and high photoluminescence quantum yields provides a promising route toward achieving both long operational lifetime and high ...
Yungui Li, Karl Leo
wiley +1 more source
Propagation of waves in a medium with high radiation pressure [PDF]
The propagation and mutual transformation of acoustic and thermal waves are investigated in media with a high radiative pressure. The equations of hydrodynamics for matter and the radiative transfer equations in a moving medium in the Eddington ...
Bisnovatyy-Kogan, G. S. +1 more
core +1 more source
Asymptotic models of meridional flows in thin viscous accretion disks
, 2002 We present the results of numerical integrations yielding the structure of and meridional flow in axisymmetric thin viscous accretion disk models.
Gitalman, L., Regev, O.
core +1 more source
Liquid Metal Microrobots for Magnetically Guided Transvascular Navigation
Advanced Materials, EarlyView.Liquid metal‐based microrobots combine magnetic steering, intrinsic X‐ray visibility and softness, to navigate blood vessels even against flow. Under clinically relevant magnetic fields, liquid metal microrobots roll along vessel walls, cross endothelial barriers, and accumulate in target tissues.
Xiaohui Ju +7 more
wiley +1 more source