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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{\...
Chris K.'s user avatar
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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 ...
D Young's user avatar
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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 ...
pretzlstyle's user avatar
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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 (...
pretzlstyle's user avatar
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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 ...
Rick's user avatar
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Why is the temperature of electron-proton recombination obtained from Saha equation so small?

I read a blog about the temperature of the Universe at recombination phase. The ionization potential of a hydrogen atom is $13.6\, eV$, throw it into the thermal energy equation $E=\frac{3}{2}kT$, ...
Halcyon Mo's user avatar
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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 ...
roland's user avatar
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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 ...
Gregonymus's user avatar