1. Interstellar Extinction vs. Dust
姜碧沩
Department of Astronomy
Beijing Normal University

2. 2015/7/13
星际/星周尘埃 2015 暑期班

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5. Principal features General rise from IR to UV (~0.1μm)
18μm and 10μm: O-Si-O bend and Si-O stretch in amorphous silicate
3.4μm: C-H stretch in hydrocarbon
2175Å: “2200 bump”. Probably pi – pi* electronic transition in sp2-bonded carbon (e.g. graphite or PAH)
400+ weak features – the Diffuse Interstellar Bands – still unidentified
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星际/星周尘埃 2015 暑期班

6. 红外消光的强度 红外测光的精度 消光改正的难度 红外的深度 Galactic Center
Gao, Li, Jiang, 2013 EPS, 65,1127
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星际/星周尘埃 2015 暑期班

7. Inhomogeneity of Interstellar Extinction
Extinction law
2D extinction
3D extinction
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星际/星周尘埃 2015 暑期班

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星际/星周尘埃 2015 暑期班
Draine 2003 ARAA

9. Schelgel et al. 1998
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星际/星周尘埃 2015 暑期班

10. Chen, Schultheis, Jiang et al 2013
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星际/星周尘埃 2015 暑期班

11. Determination of Extinction
Color excess
Intrinsic color index
stars
Line ratio
Nebula
Pair-method
Spectrum
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星际/星周尘埃 2015 暑期班

12. vs. Dust
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14. CCM89
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16. FM90 UV extinction curve
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星际/星周尘埃 2015 暑期班

17. Wang et al. 2013
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星际/星周尘埃 2015 暑期班

18. Summary Dust produces extinction, extinction reveals dust
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星际/星周尘埃 2015 暑期班
Trumpler, R PASP 42, 21

19. Influence of Extinction Herschel's Map of the Milky Way
On the Construction of the Heavens. By William Herschel, Esq. F. R. S. Philosophical Transactions of the Royal Society of London, Vol. 75. (1785), pp
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星际/星周尘埃 2015 暑期班