Infrared astronomy: an introduction - School of Physics
Infrared astronomy: an introduction - School of Physics
Infrared astronomy: an introduction - School of Physics
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Dust extinction qu<strong>an</strong>tified<br />
Reduced effects <strong>of</strong> dust in near- <strong>an</strong>d mid-infrared:<br />
Worked example:<br />
Filter λ c A λ /A V<br />
V 0.55 1.000<br />
J 1.21 0.282<br />
H 1.65 0.175<br />
K 2.20 0.112<br />
L 3.45 0.058<br />
M 4.80 0.023<br />
N 10.0 0.052<br />
Take extinction <strong>of</strong> 25 magnitudes at V: dimming by 10 10<br />
In K-b<strong>an</strong>d, would be 2.8 magnitudes: dimming by 13<br />
In M-b<strong>an</strong>d, would be 0.6 magnitudes: dimming by 4
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