The infrared line-emitting regions of T Tauri protoplanetary disks

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Table 1

Fundamental parameters of the standard “TT highres” T Tauri disk model, based on parameters from Woitke et al. (2016).

Symbol	Quantity (units)	Parameter value
M_*	Stellar mass (M_⊙)	0.7
L_*	Stellar luminosity (L_⊙)	1.0
T_eff	Effective temperature (K)	4000
f_UV	UV excess (L_UV∕L_*)	0.01
p_UV	UV power law exponent	1.3
L_X-ray	X-ray luminosity (erg s⁻¹, bremsstrahlung continuum)⁽¹⁾	10³⁰
ζ_CR	Cosmic ray H₂ ionization rate (s⁻¹)	1.7 × 10⁻¹⁷
M_disk	Disk mass (× 10⁻⁴ M_⊙)	100
ρ_d∕ρ_g	Dust-to-gas ratio	0.01
R_in	Inner disc radius (AU)	0.07
R_out	Outer disc radius (AU)	600
R_taper	Tapering-off radius (AU)	100
H₀	Scale height at 100 AU (AU)	10
β	Flaring power index	1.15
N	Number of grid points	240 × 180
a_pow	Dust size distribution f(a) ∝ a^−a_pow	3.5
	Dust grain mixture: 60% amorphous Mg_0.7 Fe_0.3 Si O₃ silicates⁽²⁾, 15% amorphous carbon⁽³⁾, 25% vacuum for porosity ^(a)
a_min	Min. dust grain size (μm)	0.05
a_max	Max. dust grain size (μm)	3000
i	Inclination angle (°)	45
α	Turbulent viscosity, for Dubrulle settling of dust grains⁽⁴⁾	0.01
χ_ISM	Strength of incident UV w.r.t. ISM field⁽⁵⁾	1

Notes. Parameter definitions are further explained by Woitke et al. (2009). ^(a) The dust is a distribution of hollow spheres, where the maximum fractional volume filled by the central void is 0.8 (Min et al. 2005, 2016).

References. ⁽¹⁾ Woitke et al. (2016), ⁽²⁾ Dorschner et al. (1995), ⁽³⁾ Zubko et al. (1996), ⁽⁴⁾ Dubrulle et al. (1995), ⁽⁵⁾ Draine (1978).

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