Dust continuum
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Dust Continuum. Intensity  Column density  Mass. Dust emission. 1.3 mm dust emission (Motte & Andre 2001). Simple case:. If τ <<1 and T d =constant , Dust Temperature T d and emissivity spectral index b can be solved!. Under Rayleigh-Jeans limit and τ <<1,.

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Dust Continuum

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Dust continuum

Dust Continuum


Intensity column density mass

Intensity  Column density  Mass

  • Dust emission

1.3 mm dust emission (Motte & Andre 2001)


Dust continuum

Simple case:

If τ <<1 and Td=constant,

Dust Temperature Td and emissivity spectral index b can be solved!

Under Rayleigh-Jeans limit and τ <<1,

Beckwith & Sargent (1991):

-1<b<1

Schnee et al, 2007, ApJ


Power law envelope

power law envelope

Mundy et al. (2000), PPVI

Motte (1998) :

Beckwith & Sargent (1991):

-1<b<1

Dust modeling:

Spitzer (1977): Chap 7-9

Draine & Le (1984)

Draine, 2003, ARA&A


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