... disks

Appendix A and Fig. A1 are only available in electronic form at http://www.aanda.org

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... thereafter)

In this paper amorphous and small, i.e., primordial and interstellar dust grains, are called not-evolved/undeveloped.

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... available

http://www.mpia-hd.mpg.de/MIDISOFT/ and http://www.strw.leidenuniv.nl/~koehler/MIA+EWS-Manual/

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...$\sim$140 pc

The spatial resolution power R of an interferometer is given by the ratio of the observing wavelength $\lambda$ and the sky-projected distance between a telescope pair, i.e., the effective baseline length B: $R=\lambda / (2B)$.

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...2001)

See http://www.astro.princeton.edu/~draine

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... distribution

For all different dust sets we assume a constant exponent of -3.5 for the grain size power law n(a).

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...$M_{\rm disk}$

We assume a gas-to-dust mass ratio of 100:1.

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... expansion

The scale-height is defined as the vertical distance from the midplane where the density has decreased by a factor $e \approx 2.718$ (Euler's constant).

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... range

The half light radius encircles the disk region emitting half of the totally released energy in the disk.

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