Now showing items 1-16 of 16

    • Comparison Catalogue of Gas-Equilibrium Constants, Kp 

      Worters, Megan; Millard, Drew; Hunter, Glen; Helling, Christiane; Woitke, Peter (University of St Andrews, 2017) - Other
    • Consistent dust and gas models for protoplanetary disks I. Disk shape, dust settling, opacities, and PAHs 

      Woitke, Peter; Min, M.; Pinte, C.; Thi, W. -F.; Kamp, I.; Rab, C.; Anthonioz, F.; Antonellini, S.; Baldovin-Saavedra, C.; Carmona, A.; Dominik, C.; Dionatos, O.; Greaves, Jane Sophia; Güdel, M.; Ilee, John David; Liebhart, A.; Ménard, F.; Rigon, Laura; Waters, L. B. F. M.; Aresu, G.; Meijerink, R.; Spaans, M. (2016-02-02) - Journal article
      We propose a set of standard assumptions for the modelling of Class II and III protoplanetary disks, which includes detailed continuumradiative transfer, thermo-chemical modelling of gas and ice, and line radiative transfer ...
    • Equlibrium chemistry down to 100 K : impact of silicates and phyllosilicates on carbon/oxygen ration 

      Woitke, Peter; Helling, Christiane; Hunter, G.H.; Millard, J.D.; Turner, G.E.; Worters, M.; Blecic, J.; Stock, J.W. (2018-06) - Journal article
      We have introduced a fast and versatile computer code, GGchem, to determine the chemical composition of gases in thermo-chemical equilibrium down to 100 K, with or without equilibrium condensation. We have reviewed the ...
    • Grand challenges in protoplanetary disc modelling 

      Haworth, Thomas J.; Ilee, John D.; Forgan, Duncan H.; Facchini, Stefano; Price, Daniel J.; Boneberg, Dominika M.; Booth, Richard A.; Clarke, Cathie J.; Gonzalez, Jean-François; Hutchison, Mark A.; Kamp, Inga; Laibe, Guillaume; Lyra, Wladimir; Meru, Farzana; Mohanty, Subhanjoy; Panić, Olja; Rice, Ken; Suzuki, Takeru; Teague, Richard; Walsh, Catherine; Woitke, Peter (2016) - Journal article
      The Protoplanetary Discussions conference—held in Edinburgh, UK, from 2016 March 7th–11th—included several open sessions led by participants. This paper reports on the discussions collectively concerned with the multi-physics ...
    • Graphical Comparison of Mineral Gibbs Free Energy Data 

      Woitke, Peter; Helling, Christiane; Turner, George (University of St Andrews, 2017) - Other
      The following pages show plots of the Gibbs-free energy of formation ΔGӨf [kJ/mol] from free atoms as function of temperature T [K] of 121 solid minerals from the SUPCRTBL database (Zimmer et al., 2016). These thermo-chemical ...
    • Heating and cooling processes in disks 

      Woitke, Peter (2015-12-09) - Journal article
      This chapter summarises current theoretical concepts and methods to determine the gas temperature structure in protoplanetary disks by balancing all relevant heating and cooling rates. The processes considered are non-LTE ...
    • The influence of non-isotropic scattering of thermal radiation on spectra of brown dwarfs and hot exoplanets 

      de Kok, R. J.; Stam, D. M.; Woitke, Peter; Witte, S.; Helling, Christiane (2011-07) - Journal article
      Context. Currently, the thermal emission from exoplanets can be measured with either direct imaging or secondary eclipse measurements of transiting exoplanets. Most of these measurements are taken at near-infrared wavelengths, ...
    • Mid-IR spectra of pre-main sequence Herbig stars : an explanation for the non-detections of water lines 

      Antonellini, S.; Kamp, I.; Lahuis, F.; Woitke, Peter; Thi, W. -F.; Meijerink, R.; Aresu, G.; Spaans, M.; Güdel, M.; Liebhart, A. (2016-01) - Journal article
      Context. The mid-IR detection rate of water lines in disks around Herbig stars disks is about 5%, while it is around 50% for disks around T Tauri stars. The reason for this is still unclear. Aims. In this study, we want ...
    • Modelling and interpretation of SEDs 

      Woitke, Peter (2015-09-23) - Journal article
      Circumstellar disks are mostly detected by larger continuum fluxes in the infrared to mm spectral regions as compared to naked stars (a flux excess). The analysis of the Spectral Energy Distribution (SED) of that flux ...
    • Multiwavelength optical properties of compact dust aggregates in protoplanetary disks 

      Min, M.; Rab, Ch; Woitke, Peter; Dominik, C.; Ménard, F. (2016-01) - Journal article
      Context. In protoplanetary disks micron-size dust grains coagulate to form larger structures with complex shapes and compositions. The coagulation process changes the absorption and scattering properties of particles in ...
    • Preface 

      Kamp, Inga; Woitke, Peter; Ilee, John (2015-09-23) - Journal article
    • The protoplanetary disk of FT Tauri : multi-wavelength data analysis and modeling 

      Garufi, Antonio; Podio, Linda; Kamp, Inga; Ménard, François; Brittain, Sean; Eiroa, Carlos; Montesinos, Benjamin; Alonso-Martinez, Míguel; Thi, Wing-Fai; Woitke, Peter (2014-07-31) - Journal article
      Investigating the evolution of protoplanetary disks is crucial for our understanding of star and planet formation. Several theoretical and observational studies have been performed in the last decades to advance this ...
    • Signatures of warm carbon monoxide in protoplanetary discs observed with Herschel SPIRE 

      van der Wiel, M. H. D.; Naylor, D. A.; Kamp, I.; Ménard, F.; Thi, W.-F.; Woitke, Peter; Olofsson, G.; Pontoppidan, K. M.; Di Francesco, J.; Glauser, A. M.; Greaves, Jane Sophia; Ivison, R. J. (2014-11-11) - Journal article
      Molecular gas constitutes the dominant mass component of protoplanetary discs. To date, these sources have not been studied comprehensively at the longest far-infrared and shortest submillimetre wavelengths. This paper ...
    • Understanding the water emission in the mid- and far-IR from protoplanetary disks around T Tauri stars 

      Antonellini, S.; Kamp, I.; Riviere-Marichalar, P.; Meijerink, R.; Woitke, Peter; Thi, W.-F.; Spaans, M.; Aresu, G.; Lee, Graham Kim Huat (2015-10) - Journal article
      Aims. We investigate which properties of protoplanetary disks around T Tauri stars affect the physics and chemistry in the regions where mid- and far-IR water lines originate and their respective line fluxes. We search for ...
    • Variability in the CO ro-vibrational lines from HD163296 

      Bertelsen, Rosina P. Hein; Kamp, I.; Plas, G. van der; van den Ancker, M. E.; Waters, L. B. F. M.; Thi, W. -F.; Woitke, Peter (2016-05-11) - Journal article
      We present for the first time a direct comparison of multi-epoch (2001–2002 and 2012) CO ro-vibrational emission lines from HD 163296. We find that both the line shapes and the FWHM (full width at half-maximum) differ ...
    • Water delivery in the inner solar nebula : Monte Carlo simulations of forsterite hydration 

      D'Angelo, Martina; Cazaux, Stephanie; Kamp, Inga; Thi, Wing-Fai; Woitke, Peter (2019-02-20) - Journal article
      Context:  Endogenous or exogenous, dry or wet, various scenarios have been so far depicted for the origin of water on our Solar Systems rocky bodies. Hydrated silicates found in meteorites and in interplanetary dust particles ...