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Table 2

General parameters of the model of HL Tau and its circumstellar material. See Sects. 4.1 to 4.3 for details.

Parameter Value
Stellar parameters
Stellar luminosity 11 L
Effective temperature 4000 K
Stellar radius 6.9 R
Disk parameters
Inclination 46.7°
Position angle 138°
Reference disk density ρ0disk $\[\rho_{0}^{\text {disk }}\]$ 7.2 × 10−14 g cm−3
Characteristic disk radius Rc 100 au
Reference scale height h0 15 au
Radial disk profile α 0.95
Disk flaring β 1.15
Inner radius 0.4 au
Resulting disk gas mass 0.13 M
Envelope parameters
Reference envelope density ρ0env $\[\rho_{0}^{\text {env }}\]$ 2.4 × 10−18 g cm−3
Reference envelope radius Re 1000 au
Radial envelope profile γ 0.65
Outer radius 104 au
Resulting envelope gas mass Menv 0.016 M
Magnetic field strength 1 mG
Inner magnetic field radius 100 au
Magnetic field position angle 25°
Dust parameters
Minimum grain size 0.01 μm
Maximum grain size amax (disk) 35 μm
Distribution exponent q (disk) 3.5
Maximum grain size amax (envelope) 1 μm
Distribution exponent q (envelope) 4.0
Axis ratio of spheroids 2/3
Gas-to-dust mass ratio 100
Reference RAT efficiency Q0 0.4
RAT efficiency exponent η 3
Rayleigh reduction factor 0.3

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