Table 1: Grain porosity and fractional amount of carbon in grains as derived from fitting the 10  $\mu {\rm m}$ silicate emission feature.

Star		 Type1 ${\cal P}$ $V_{\rm Be1}/V_{\rm solid}$ $M_{\rm Be1}/M_{\rm MgFeSiO_4}$ Age, Myr Ref.2 Comment

Tr 37 73-758		 t 0.784 0.259 0.196 1.8 1  
Tr 37 11-2146 t 0.705 0.217 0.156 0.9 1  
Tr 37 11-2037 t 0.615 0.232 0.170 2.5 1  
Tr 37 11-2031 t 0.542 0.167 0.113 2.5 1  
Tr 37 14-183 t 0.704 0.281 0.219 0.9 1  
Tr 37 82-272 t 0.726 0.188 0.130 10.5 1  
Tr 37 12-2113 t 0.650 0.186 0.128 1.1 1  
Tr 37 13-157 t 0.804 0.250 0.187 2.4 1  
Tr 37 91-155 t 0.976 0.320 0.264 1.7 1  
Tr 37 54-1547 t 0.556 0.132 0.085 5.7 1  
Tr 37 13-1250 t 0.649 0.124 0.079 3.3 1  
Tr 37 23-162 t 0.722 0.247 0.184 6.6 1  
Tr 37 01-580 t 0.604 0.167 0.112 8.7 1  
NGC 7160 DG-481 h 0.852 0.333 0.279 12.0 1  
SU Aur t 0.731 0.131 0.085 3.9 2 age from (5)
GW Ori t 0.562 0.102 0.064 1.0 2  
CR Cha t 0.471 0.107 0.067 1.0 2  
Glass I t 0.671 0.208 0.147 1.0 2  
WW Cha t 0.539 0.194 0.135 0.3 2  
SZ 82 t 0.427 0.376 0.338 1.1 2  
AS 205S t 0.556 0.251 0.188 0.1 2  
Haro 1-16 t 0.425 0.141 0.092 0.5 2  
AK Sco t 0.519 0.116 0.073 7.6 2 age from (5)
FM Tau t 0.598 0.256 0.193 2.8 3 age from (6)
GG Tau A t 0.401 0.356 0.310 3.3 3 age from (7)
GG Tau B t 0.841 0.342 0.292 1.6 3 age from (7)
GM Aur t 0.700 0.162 0.109 7.4 3 age from (7)
IP Tau t 0.493 0.213 0.152 4.3 3 age from (7)
TW Hya t 0.756 0.158 0.105 10.0 3 age from (2)
Hen 3-600 A t 0.860 0.239 0.176   3  
V410 Anon 13 t 0.651 0.398 0.370   3  
HD 104237 h 0.612 0.307 0.249 4.8 4 age from (5)
HD 142527 h 0.673 0.301 0.242 1.0 4  
HD 142666 h 0.680 0.268 0.205 4.4 4 age from (5)
HD 144432 h 0.440 0.123 0.078 6.65 4 age from (5)
HD 144668 h 0.832 0.504 0.569 0.5 4  
HD 150193 h 0.398 0.180 0.124 2.6 4 age from (5)
HD 163296 h 0.537 0.209 0.148 6.0 4 age from (5)
HD 179218 h 0.948 0.292 0.231 1.3 4  
HD 245185 h 0.704 0.149 0.098 3.3 4 age from (5)
HD 36112 h 0.431 0.122 0.078 4.4 4 age from (5)
HD 37357 h 0.480 0.206 0.146 10.0 4  
HD 37806 h 0.732 0.405 0.382 0.8 4  
AB Aur h 0.714 0.187 0.129 4.8 4 age from (7)
HK Ori h 0.551 0.400 0.374 5.8 4 age from (5)
UX Ori h 0.392 0.160 0.107 2.8 4 age from (5)
V380 Ori h 0.694 0.493 0.545 7.4 4 age from (5)
1 Meaning of symbols: t = T Tau star, h = Herbig Ae/Be star.
2 References for observational data: (1) Sicilia-Aguilar et al. (2007); (2) Schegerer et al. (2006); (3) Sargent et al. (2006);
(4) van Boekel et al. (2005); (5) Blondel & Tjin A Djie (2006); (6) Güdel et al. (2007); (7) Bertout et al. (2007).

Source LaTeX | All tables | In the text