Browsing by Subject "Radiative transfer"

Now showing items 1-20 of 29

    • 3D radiative transfer of intrinsically polarized dust emission based on aligned aspherical grains 
      Bertrang, Gesa H.-M.; Wolf, S. (Oxford University Pres, 2017)
      (Sub-)millimetre observations of the polarized emission of aligned aspherical dust grains enable us to study the magnetic fields within protoplanetary disc. However, the interpretation of these observations is complex. One ...
    • A giant planet shaping the disk around the very low-mass star CIDA 1 
      Curone, P.; Izquierdo, A. F.; Testi, L.; Lodato, G.; Facchini, S.; Natta, A.; Pinilla, P.; Kurtovic, N. T.; Toci, C.; Benisty, Myriam; Tazzari, M.; Borsa, F.; Lombardi, M.; Manara, C. F.; Sanchis, E.; Ricci, L. (EDP Sciences, 2022)
      Context. Exoplanetary research has provided us with exciting discoveries of planets around very low-mass (VLM) stars (0.08 M-circle dot less than or similar to M-*less than or similar to 0.3 M-circle dot ; e.g., TRAPPIST-1 ...
    • A magnetar model for the hydrogen rich super luminous supernova iPTF14hls 
      Dessart, Luc (EDP Sciences, 2018)
      Transient surveys have recently revealed the existence of H-rich super-luminous supernovae (SLSN; e. g., iPTF14hls, OGLE-SN14-073) that are characterized by an exceptionally high time-integrated bolometric luminosity, a ...
    • A Resolved and Asymmetric Ring of PAHs within the Young Circumstellar Disk of IRS 48 
      Schworer, Guillaume; Lacour, Sylvestre; Huélamo, Nuria; Pinte, Christophe; Chauvin, G.; du Foresto, Vincent Coudé; Ehrenreich, David; Girard, Julien; Tuthill, Peter (IOP Publishing, 2017)
      For one decade, the spectral type and age of the rho Oph object IRS-48 were subject to debate. and mystery. Modeling its disk with mid-infrared to millimeter observations led to various explanations to account for the ...
    • ALMA observations of the nearby AGB star L2 Puppis II. Gas disk properties derived from 12CO and 13CO J = ... 
      Homan, Ward; Richards, Anita; Decin, Leen; Kervella, Pierre; Koter, Alex de; McDonald, Iain; Ohnaka, Keiichi (EDP Sciences, 2017-05)
      The circumstellar environment of the AGB star L-2 Puppis was observed with ALMA in cycle 3, with a resolution of 15 x 18 mas. The molecular emission shows a differentially rotating disk, inclined to a nearly edge-on position. ...
    • Benchmarking the calculation of stochastic heating and emissivity of dust grains in the context of radiative ... 
      Camps, Peter; Misselt, Karl; Bianchi, Simone; Lunttila, Tuomas; Pinte, Christophe; Natale, Giovanni; Juvela, Mika; Fischera, Joerg; Fitzgerald, Michael P.; Gordon, Karl; Baes, Maarten; Steinacker, Jürgen (EDP Sciences, 2015)
      Context. Thermal emission by stochastically heated dust grains (SHGs) plays an important role in the radiative transfer (RT) problem for a dusty medium. It is therefore essential to verify that RT codes properly calculate ...
    • Discovery of a planetary-mass companion within the gap of the transition disk around PDS 70 
      Keppler, M.; Benisty, Myriam; Müller, A.; Henning, Th; Van Boekel, R.; Cantalloube, F.; Ginski, C.; Van Holstein, R.; Maire, A.; Pohl, A.; Samland, M.; Avenhaus, H.; Baudino, J.; Boccaletti, A.; De Boer, J.; Bonnefoy, M.; Chauvin, G.; Desidera, S.; Langlois, M.; Lazzoni, C.; Marleau, G.; Mordasini, C.; Pawellek, N.; Stolker, T.; Vigan, A.; Zurlo, A.; Birnstiel, T.; Brandner, W.; Feldt, M.; Flock, M.; Girard, J.; Gratton, R.; Hagelberg, J.; Isella, A.; Janson, M.; Juhasz, A.; Kemmer, J.; Kral, Q.; Lagrange, Anne Marie; Launhardt, R.; Matter, A.; Ménard, F.; Milli, J.; Mollière, P.; Olofsson, J.; Pérez, L.; Pinilla, P.; Pinte, C.; Quanz, S. P.; Schmidt, T.; Udry, S.; Wahhaj, Z.; Williams, J. P.; Buenzli, E.; Cudel, M.; Dominik, C.; Galicher, R.; Kasper, M.; Lannier, J.; Mesa, D.; Mouillet, D.; Peretti, S.; Perrot, C.; Salter, G.; Sissa, E.; Wildi, F.; Abe, L.; Antichi, J.; Augereau, J.; Baruffolo, A.; Baudoz, P.; Bazzon, A.; Beuzit, J.-L.; Blanchard, P.; Brems, S.; Buey, T.; De Caprio, V.; Carbillet, M.; Carle, M.; Cascone, E.; Cheetham, A.; Claudi, R.; Costille, A.; Delboulbé, A.; Dohlen, K.; Fantinel, D.; Feautrier, P.; Fusco, T.; Giro, E.; Gluck, L.; Gry, C.; Hubin, N.; Hugot, E.; Jaquet, M.; Le Mignant, D.; Llored, M.; Madec, F.; Magnard, Y.; Martínez, P.; Maurel, D.; Meyer, M.; Möller-Nilsson, O.; Moulin, T.; Mugnier, L.; Origné, A.; Pavlov, A.; Perret, D.; Petit, C.; Pragt, J.; Puget, P.; Rabou, P.; Ramos, J.; Rigal, F.; Rochat, S.; Roelfsema, R.; Rousset, G.; Roux, A.; Salasnich, B.; Sauvage, J.; Sevin, A.; Soenke, C.; Stadler, E.; Suarez, M.; Turatto, M.; Weber, L. (EDP Sciences, 2018)
      Context. Young circumstellar disks are the birthplaces of planets. Their study is of prime interest to understand the physical and chemical conditions under which planet formation takes place. Only very few detections of ...
    • Dissecting the active galactic nucleus in Circinus - I. Peculiar mid-IR morphology explained by a dusty hollow cone 
      Stalevski, Marko; Asmus, Daniel; Tristram, Konrad R. W. (Oxford university press, 2017)
      Recent high angular resolution observations resolved for the first time the mid-infrared (MIR) structure of nearby active galactic nuclei (AGN). Surprisingly, they revealed that a major fraction of their MIR emission comes ...
    • Dust and gas in the disk of HL TAURI: surface density, dust settling, and dust-to-gas ratio 
      Pinte, Christophe; Dent, William R. F.; Ménard, Francois; Hales, A.; Hill, T.; Cortes, P.; De Gregorio Monsalvo, Itziar (IOP Publishing, 2016)
      The recent ALMA observations of the disk surrounding HL Tau reveal a very complex dust spatial distribution. We present a radiative transfer model accounting for the observed gaps and bright rings as well as radial changes ...
    • Dust Emission at 8 and 24 µm as Diagnostics of H II Region Radiative Transfer 
      Oey, M. S.; López Hernández, J.; Kellar, J. A.; Pellegrini, E. W.; Gordon, K. D.; Jameson, K. E.; Li, A.; Madden, S. C.; Meixner, M.; Roman Duval, Julia; Bot, C.; Rubio López, Mónica; Tielens, A. G. G. M. (IOP Publishing Ltd, 2017)
      We use the Spitzer Surveying the Agents of Galaxy Evolution (SAGE) survey of the Magellanic Clouds to evaluate the relationship between the 8 mu m polycyclic aromatic hydrocarbon (PAH) emission, 24 mu m hot dust emission, ...
    • Ejecta mass diagnostics of type Ia supernovae 
      Wilk, Kevin D.; Hillier, D. John; Dessart, Luc (Oxford University Press, 2018)
      We present one-dimensional non-local thermodynamic equilibrium time-dependent radiative transfer simulations (using CMFGEN) of two sub-Chandrasekhar (sub-M-Ch), one M-Ch and one super-M-Ch Type Ia SN ejecta models. Three ...
    • Evidence for sub - Chandrasekhar- mass progenitors of type Ia supernovae at the faint end of the width ... 
      Blondin, Stephane; Dessart, Luc; Hillier, D. John; Khokhlov, Alexei M. (Oxford University Pres, 2017)
      The faster light-curve evolution of low-luminosity Type Ia supernovae (SNe Ia) suggests that they could result from the explosion of white dwarf (WD) progenitors below the Chandrasekhar mass (M-Ch). Here we present 1D ...
    • Explosion of red supergiant stars: influence of the atmospheric structure on shock breakout and early time ... 
      Dessart, Luc; Hillier, D. John; Audit, Edouard (EDP Sciences, 2017)
      Early-time observations of Type II supernovae (SNe) 2013cu and 2013fs have revealed an interaction of ejecta with material near the star surface. Unlike Type IIn SN 2010jl, which interacts with a dense wind for similar to ...
    • HD 169142 in the eyes of ZIMPOL/SPHERE 
      Bertrang, G. H. M.; Avenhaus, H.; Casassus Montero, Simón; Montesinos, M.; Kirchschlager, F.; Pérez, S.; Cieza, L.; Wolf, S. (Oxford University Press, 2018)
      We present new data of the protoplanetary disc surrounding the Herbig Ae/Be star HD 169142 obtained in the very broad-band (VBB) with the Zurich imaging polarimeter (ZIMPOL), a sub-system of the Spectro-Polarimetric ...
    • Magnetic fields in protoplanetary discs: from MHD simulations to ALMA observations 
      Bertrang, Gesa; Flock, M.; Wolf, S. (Oxford University Press, 2017-01)
      Magnetic fields significantly influence the evolution of protoplanetary discs and the formation of planets, following the predictions of numerous magnetohydrodynamic (MHD) simulations. However, these predictions are yet ...
    • New constraints on the disk characteristics and companion candidates around T Chamaeleontis with VLT/SPHERE 
      Pohl, A.; Sissa, E.; Langlois, M.; Zurlo, A. (EDP Sciences, 2017)
      Context. The transition disk around the T Tauri star T Cha possesses a large gap, making it a prime target for high-resolution imaging in the context of planet formation. Aims. We aim to find signs of disk evolutionary ...
    • Nine Localized Deviations from Keplerian Rotation in the DSHARP Circumstellar Disks: Kinematic Evidence for ... 
      Pinte, C.; Price, D. J.; Ménard, F.; Duchene, G.; Christiaens, V.; Andrews, S. M.; Huang, J.; Hill, T.; van der Plas, G.; Pérez, L. M.; Isella, A.; Boehler, Y.; Dent, W. R. F.; Mentiplay, D.; Loomis, R. A. (IOP Publishing, 2020)
      We present evidence for localized deviations from Keplerian rotation, i.e., velocity "kinks," in 8 of the 18 circumstellar disks observed by the DSHARP program: DoAr 25, Elias 2-27, GW Lup, HD 143006, HD 163296, IM Lup, ...
    • Polarization in Monte Carlo radiative transfer and dust scattering polarization signatures of spiral galaxies 
      Peest, C.; Camps, P.; Stalevski, Marko; Baes, M.; Siebenmorgen, R. (EDP Sciences, 2017-05)
      Polarization is an important tool to further the understanding of interstellar dust and the sources behind it. In this paper we describe our implementation of polarization that is due to scattering of light by spherical ...
    • Radiation hydrodynamical turbulence in protoplanetary disks: Numerical models and observational constraints 
      Flock, Mario; Nelson, Richard P.; Turner, Neal J.; Bertrang, Gesa H.-M.; Carrasco González, Carlos; Henning, Thomas; Lyra, Wladimir; Teague, Richard (IOP Publishing Ltd, 2017)
      Planets are born in protostellar disks, which are now observed with enough resolution to address questions about internal gas flows. Magnetic forces are possibly drivers of the flows, but ionization state estimates suggest ...
    • Shadowing and multiple rings in the protoplanetary disk of HD 139614 
      Muro Arena, G. A.; Benisty, Myriam; Ginski, C.; Dominik, C.; Facchini, S.; Villenave, M.; van Boekel, R.; Chauvin, G.; Garufi, A.; Henning, T.; Janson, M.; Keppler, M.; Matter, A.; Menard, F.; Stolker, T.; Zurlo, A.; Blanchard, P.; Maurel, D.; Moeller Nilsson, O.; Petit, C.; Roux, A.; Sevin, A.; Wildi, F. (EDP Sciences, 2020)
      Context. Shadows in scattered light images of protoplanetary disks are a common feature and support the presence of warps or misalignments between disk regions. These warps are possibly caused by an inclined (sub-)stellar ...