Table 1
Properties of a few selected dust species.
| Material | A mon | ρ gr | Lim. | εlim/s | p | T c | R c |
|
Γ | References and comments |
| (u) | (g/cm3) | element | (K) | (R∗) | (cm2/g) | |||||
|
|
||||||||||
| Fe | 56 | 7.87 | Fe | 3.24 × 10-5 | 2.4 | 1050 | 11.5 | 1.5 | 0.6 | 1, 4. |
| Al2O3 | 102 | 3.97 | Al | 1.48 × 10-6 | 1.7 | 1400 | 3.6 | 4 × 10-2 | 2 × 10-2 | 1, 6, 10. |
| TiO2 | 80 | 4.26 | Ti | 9.77 × 10-8 | 0.1 | 1100 | 3.4 | 6 × 10-5 | 2 × 10-5 | 2, 3. |
| SiO2 | 60 | 2.20 | Si | 3.55 × 10-5 | 0.2 | 1050 | 3.9 | 6 × 10-2 | 2 × 10-2 | 1, 9. Interpolated optical data. |
| MgSiO3 | 100 | 2.71 | Si | 3.55 × 10-5 | −0.5 | 1100 | 2.6 | 5 × 10-2 | 2 × 10-2 | 1, 7. |
| Mg2SiO4 | 140 | 3.27 | Mg | 1.90 × 10-5 | −0.9 | 1100 | 2.1 | 3 × 10-2 | 1 × 10-2 | 1, 7. SPL in Col. 6, 9–10. |
| MgFeSiO4 | 172 | 3.75 | Fe | 3.24 × 10-5 | 2.3 | 1100 | 9.5 | 2.9 | 1.1 | 1, 8. |
|
|
||||||||||
| amC | 12 | 1.85 | C | 1.85 × 10-4 | 1.2 | 1700 | 1.8 | 6.9 | 2.6 | 2, 5. C-rich atmospheres. |
Notes. Columns 2–7 list grain material properties, i.e., the atomic
weight of the monomer Amon, the bulk density
ρgr, the limiting element and the adjusted abundance
of said element
εlim/s, the power
law coefficient p and the condensation temperature
Tc. Column 8–10 include properties that depend on the
chosen stellar parameters (see Sect. 4), i.e.,
the condensation distance Rc, the flux-averaged dust
opacity for full condensation of the limiting element
and Γ. For
the abundances of the limiting elements we adopted the values from Grevesse & Anders (1989), except for C, N
and O where we took the data from Grevesse &
Sauval (1994). For amC the abundance was calculated using the formula
εC = (C/O−1)εO,
with a C/O-ratio of 1.25. The first reference in Col. 11 corresponds to condensation
temperature (from chemical equilibrium calculations) and the second to bulk density
and optical data in the NIR. The values given for SiO2 in the NIR are
derived from an interpolation, using data from Palik
(1985), and probably overestimating the cross-sections. SPL is short for
small particle limit.
References. (1) Gail (2010); (2) Lattimer & Grossman (1978); (3) Zeidler et al. (2011); (4) Ordal et al. (1988); (5) Rouleau & Martin (1991); (6) Koike et al. (1995); (7) Jäger et al. (2003): (8) Dorschner et al. (1995): (9) Palik (1985): (10) Begemann et al. (1997).
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