ism extinction curveeldora.as.arizona.edu/~yshirley/arizona/ast300b/ast300b...some form of...
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2/10/20
1
ISM Extinction Curve
Notice this is inverse wavelength àOr “wavenumber”
Whittet – Dust in Galactic Environment
217.5 nm
Effect of RV on Extinction Curve
Notice this is inverse wavelength àOr wavenumber
2/10/20
2
Typical Al Table
Adapted from Rieke & Lebofsky 1986
Column Density vs. E(B-V) Relation
Rachford et al. 2009
(5.94 +/- 0.37) X 1021 atoms cm-2 mag-1
2/10/20
3
Infrared Extinction Curve
Notice we’ve switched back to àjust wavelength
Falls off like a power-law tpfar-IR/radio
Extinction Mapping : Using background star color excesses to measure Al
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