Questions tagged [radiative-transfer]
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What are those weird flux-like quantities ($N$-notation?) I see in astrophysics papers?
I have been reading some astrophysics papers on Fermi Bubbles and in a lot of them, diagrams depicting SEDs use a weird $ E^2 \, \frac{\text{d}N}{\text{d}E} $ quantity, in units of $ \left[ \frac{\...
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Heat transfer on Mars
SCENARIO:
I have been tasked with finding the heat transfer across a composite wall on Mars.
On the left of the wall there is air maintained at Earth atmospheric conditions and room temperature (101 ...
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How do surface temperatures drop in response to optical depth?
I'm trying to come up with a super simple estimate for how atmospheric surface temperatures would be affected by a substance overhead with some optical depth $\tau$. I'll assume that the sun is always ...
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How does a volcanic eruption cool the planet's surface?
For example, after the eruption of Mt. Pinatubo in 1991 according to this paper,
The introduction of large amounts of sulphuric acid aerosol into the stratosphere increases the planetary albedo (...
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Brightness Temperature layered atmosphere
I'm trying to figure out how to apply the radiative transfer model to calculate the brightness temperature Tb in microwave (Rayleigh–Jeans approximation) considering atmosphere and no scattering.
If I ...
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Can radiative transfer theory be used to calculate an effective index of refraction?
As I understand it, the (real) index of refraction is given by the ratio of speed of a monochromatic light wave in vacuo versus speed in medium. When it comes to the question of propagation of a light ...
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+200
Writing a Monte Carlo radiative transfer simulation for computing the observed blackbody radiance due to the environment
Background
I'm attempting to determine the power observed at some antenna immersed in some perhaps highly anisotropic scattering and absorbing medium due to the blackbody radiance of the environment. ...
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Modeling radiative transfer in a two-layer, vertically inhomogeneous medium in local thermodynamic equilibrium
Background
I'd like to determine the power observed by an antenna due to the blackbody radiation emitted by the medium in which it is immersed. I'd like to take into account absorption, emission, and ...
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Can the terms "Lambertian albedo" and "white-sky albedo" be used interchangeably?
To my knowledge the "white-sky albedo" is the surface albedo corresponding to diffuse illumination while "black-sky albedo" corresponds to the direct illumination. I am confused ...
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Can the optical depth vary in a cloud of homegeneous temperature and density?
For the cloud in the title, could $\tau \gg 1$ in one spatial direction and $\tau \ll 1$ in another? Since its density is homogeneous, I think $\tau$ would be the same in any direction if we measure ...
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How do I understand the time evolution of gas temperature in this paper?
I am reading this paper
Title: "Radiative transfer through Galactic medium"
I am having some problems with equation $(8)$:
$$\frac{dT}{dt}=\frac{2(G-L)}{3kn}+\frac Tn\frac{dn_e}{dt}-3\frac{\...
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How many scattering events happen in the atmosphere over 1 km?
In Vector Monte Carlo Atmospheric Radiative Transfer Simulations, they take a Stokes vector, let's say [1,1,0,0] and multiply it with a matrix, with elements close to 1. But if there are much ...
