The emergent intensity from a star's atmosphere is I1. Before the light from the star reaches the observer, it passes through a dust shell with optical depth T < 1 and source function S which is independent of T. Beginning with the equation of radiative transfer IS, show that the observed intensity is, dI dT = 10 ≈ I₁ (1 − T) + ST. -
The emergent intensity from a star's atmosphere is I1. Before the light from the star reaches the observer, it passes through a dust shell with optical depth T < 1 and source function S which is independent of T. Beginning with the equation of radiative transfer IS, show that the observed intensity is, dI dT = 10 ≈ I₁ (1 − T) + ST. -
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Transcribed Image Text:The emergent intensity from a star's atmosphere is I1.
Before the light from the star reaches the observer, it
passes through a dust shell with optical depth T < 1 and
source function S which is independent of T.
Beginning with the equation of radiative transfer
IS, show that the observed intensity is,
dI
dT
=
10 ≈ I₁ (1 − T) + ST.
-
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