Modelling planet-forming circumstellar discs - Herschel

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Continuum & Line Radiative Transfer dIν dτ = Sν − Iν , dust in radiative equilibrium (+ non-rad. heating) incident stellar: incident interstellar: • far UV (Draine) • CMB (2.7 K) • isotrop EITHER use ProDiMo ... – isotropic scat. ray-based, long-char., accelerated Λ-iteration OR use MCFOST (Pinte et al. 2009; Ménard’s previous talk) ... – anisotropic scattering, Monte-Carlo, diffusion solver, ... • ray-tracing of continuum and non-LTE line transfer, for given inclination, to get simulated observations • open issues: gas opacities? X-ray RT with Compton scattering? •First •Prev •Next •Last •Go Back •Full Screen •Close •Quit
κ [cm 2 /g(dust)] Disc dust is special ... (from Mie and effective medium theory, f(a) ∝ a −3.5 size distribution, gas/dust =100) amin amax carbon surface/H [cm 2 ] AV /NH [cm 2 ] albedo V ISM 0.005 µm 0.25 µm 25% 5.3 × 10 −21 6.9 × 10 −22 0.36 disc 1 0.05 µm 1 mm 25% 2.6 × 10 −23 1.6 × 10 −23 0.48 disc 2 0.05 µm 1 mm 0% 2.6 × 10 −23 1.3 × 10 −23 0.76 disc 3 1 µm 10 cm 0% 5.9 × 10 −25 3.5 × 10 −25 0.56 10 5 10 4 10 3 10 2 10 1 10 0 ISM disc_2 disc_3 λ -1 κ ext κ abs κ sca 0.1 1.0 10.0 λ [µm] 100.0 1000.0 • more difficult to form H2 (even more so if dust is settled!) • UV penetrates much deeper than used from ISM • unusual combinations of high densities & high UV fluxes • be careful with any formula from ISM research! •First •Prev •Next •Last •Go Back •Full Screen •Close •Quit
Page 1 and 2: Modelling Planet-forming Circumstel
Page 3 and 4: What means (radiation) thermo-chemi
Page 5 and 6: PROtoplanetary DIsk MOdel main pape
Page 7: Heating & Cooling � Γk(Tgas, ni,
Page 11 and 12: Radiation thermo-chemical disc mode
Page 13 and 14: Some remarkable results and latest
Page 15 and 16: z / r Dust and Gas Temperature L⋆
Page 17 and 18: Do the models agree? Bruderer et al
Page 19 and 20: Using optical - sub-mm lines to con
Page 21 and 22: Important results from Herschel •
Page 23 and 24: HD 100546: analysis of PACS/DIGIT d
Page 25 and 26: z [AU] 100 10 1 0.1 0.01 HD 169142:
Page 27 and 28: Herschel Water Lines I Riviere-Mari
Page 29 and 30: log ν F ν [erg/cm 2 /s] z [AU] -1
Page 31 and 32: Bad things (major uncertainties)

Modelling planet-forming circumstellar discs - Herschel

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