Browsing by Author "XX644845"

Now showing items 21-40 of 70

    • Disks around T Tauri stars with sphere (DARTTS-S) II. Twenty- one new polarimetric images of young stellar disks 
      Garufi, A.; Avenhaus, H.; Pérez, S.; Quanz, S. P.; van Holstein, R. G.; Bertrang, G. H-M; Casassus Montero, Simón; Cieza, L.; Principe, D. A.; van der Plas, G.; Zurlo, A. (EDP Sciences, 2020)
      Context. Near-IR polarimetric images of protoplanetary disks enable us to characterize substructures that might be due to the interaction with (forming) planets. The available census is strongly biased toward massive disks ...
    • Dust traps and warps in transitional protoplanetary disks 
      Marino Estay, Sebastián (Universidad de Chile, 2015)
      Actualmente se piensa que los planetas se forman alrededor de estrellas jovenes en discos circumestelares que pueden durar unos pocos Ma. Estos discos protoplanetarios evolucionan a traves de diferentes mecanismos. Dos ...
    • Emisión Anómala en Ondas Centimétricas de las Nubes Translúcidas ζ OPH y LDN 1780 
      Vidal Navarro, Matías Ambrosio (Universidad de ChileCyberDocs, 2010)
    • Emisión Infrarroja de Regiones de Formación de Estrellas Masivas 
      Morales Häfelin, Esteban Félix Eduardo (Universidad de ChilePrograma Cybertesis, 2007)
    • Erratum: Cooling in the shade of warped transition disks 
      Casassus Montero, Simón; Pérez, Sebastián; Osses Alvarado, Axel; Marino, Sebastián (Oxford University Press, 2020)
      This is an Erratum to the paper ‘Cooling in the shade of warped transition disks’ that was published in MNRAS, 486, L58-L62 (2019). The x-axis of Fig. 1 in the original version of the paper is incorrectly labeled, the ...
    • Estudio Spitzer e Infrarrojo Cercano de Regiones de Formación de Estrellas Masivas: Cúmulos Embebidos 
      Chavarría Garrido, Luis Agustín (Universidad de ChilePrograma Cybertesis, 2009)
    • Evidence for a Circumplanetary Disk around Protoplanet PDS 70 b 
      Christiaens, Valentin; Cantalloube, Faustine; Casassus Montero, Simón; Price, Daniel J.; Absil, Olivier; Pinte, Christophe; Girard, Julien; Montesinos, Matias (Institute of Physics Publishing, 2019)
      © 2019. The American Astronomical Society. All rights reserved.We present the first observational evidence for a circumplanetary disk (CPD) around the protoplanet PDS 70 b, based on a new spectrum in the K-band acquired ...
    • Exocometary gas in the HD 181327 debris ring 
      Marino, S.; Matra, L.; Stark, C.; Wyatt, M. C.; Casassus Montero, Simón; Kennedy, G.; Rodríguez, D.; Zuckerman, B.; Pérez, S.; Dent, William R. F.; Kuchner, M.; Hughes, A.M.; Schneider, G.; Steele, A.; Roberge, A.; Donaldson, J.; Nesvold, E. (2016)
      An increasing number of observations have shown that gaseous debris discs are not an exception. However, until now, we only knew of cases around A stars. Here we present the first detection of (CO)-C-12 (2-1) disc emission ...
    • Extended mosaic observations with the Cosmic Background Imager 
      Readhead, A. C. S.; Mason, B. S.; Contaldi, C. R.; Pearson, T. J.; Bond, J. R.; Myers, S. T.; Padin, S.; Sievers, J. L.; Cartwright, J. K.; Shepherd, M. C.; Pogosyan, D.; Prunet, S.; Altamirano, P.; Bustos, R.; Bronfman Aguiló, Leonardo; Casassus Montero, Simón; Holzapfel, W. L.; May Humeres, Jorge; Pen, U.-L.; Torres, S.; Udomprasert, P. S. (IOP PUBLISHING, 2004-07-10)
      Two years of microwave background observations with the Cosmic Background Imager ( CBI) have been combined to give a sensitive, high-resolution angular power spectrum over the range 400 < l < 3500. This power spectrum has ...
    • Flows of gas through a protoplanetary gap 
      Casassus Montero, Simón (Macmillan Publishers Limited., 2013-06-10)
      The formation of gaseous giant planets is thought to occur in the first few million years after stellar birth. Models(1) predict that the process produces a deep gap in the dust component (shallower in the gas(2-4)). ...
    • 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 ...
    • Imaging the water snow-line during a protostellar outburst 
      Cieza González, Lucas; Casassus Montero, Simón; Tobin, John; Bos, Steven; Williams, Jonathan; Pérez, Sebastián; Zhu, Zhaohuan; Canovas, Héctor; Dunham, Michael; Hales, Antonio; Prieto, José; Principe, David; Schreiber, Matthias; Ruiz Rodríguez, Dary; Zurlo, Alice (Nature Publishing Group, 2016)
      A snow-line is the region of a protoplanetary disk at which a major volatile, such as water or carbon monoxide, reaches its condensation temperature. Snow-lines play a crucial role in disk evolution by promoting the rapid ...
    • Infrared-correlated 31-GHz radio emission from Orion East 
      Dickinson, C.; Casassus Montero, Simón; Davies, R. D.; Allison, J.; Bustos, R.; Cleary, K.; Davis, R. J.; Jones, M. E.; Pearson, T. J.; Readhead, A. C. S.; Reeves, R.; Taylor, A. C.; Tibbs, C. T.; Watson, R. A. (WILEY-BLACKWELL PUBLISHING, 2010-10-01)
      Lynds dark cloud LDN1622 represents one of the best examples of anomalous dust emission, possibly originating from small spinning dust grains. We present Cosmic Background Imager (CBI) 31-GHz data of LDN1621, a diffuse ...
    • Interstellar 12C/13C from CH+ absorption lines: results from an extended survey 
      Stahl, O.; Casassus Montero, Simón; Wilson, T. (2008)
      Context. The 12C/13C isotope ratio in the interstellar medium (ISM) and its evolution with time are important tracers of stellar yields. Spatial variations in this ratio can be used to study mixing in the ISM. Aims. We ...
    • Long baseline observations of the HD 100546 protoplanetary disk with ALMA 
      Peréz Márquez, Sebastián; Casassus Montero, Simón; Hales, Antonio; Marino, Sebastián; Cheetham, Anthony; Zurlo, Alice; Cieza, Lucas; Dong, Ruobing; Alarcón, Felipe; Benítez Llambay, Pablo; Fomalont, Ed; Avenhaus, Henning (IOP, 2020)
      Using the Atacama Large Millimeter/submillimeter Array, we observed the young Herbig star HD 100546, host to a prominent disk with a deep, wide gap in the dust. The high-resolution 1.3 mm continuum observation reveals fine ...
    • Modelamiento de la Radiación Galáctica a 45 y 408 mhz Aplicado a la Deducción de la Distribución de Energía ... 
      Guzmán Fernández, Andrés (Universidad de ChilePrograma Cybertesis, 2007)
    • Modelling the spinning dust emission from LDN1780 
      Vidal, Matías; Dickinson, Clive; Harper, S. E.; Casassus Montero, Simón; Witt, A. N. (Oxford University Press, 2020)
      We study the anomalous microwave emission (AME) in the Lynds Dark Nebula (LDN) 1780 on two angular scales. With publicly available data at an angular resolution of 1 degrees, we studied the spectral energy distribution of ...
    • Multi-GPU maximum entropy image synthesis for radio astronomy 
      Cárcamo, M.; Roman, P. E.; Casassus Montero, Simón; Moral, V.; Rannou, F. R. (Elsevier, 2018)
      The maximum entropy method (MEM) is a well known deconvolution technique in radio-interferometry. This method solves a non-linear optimization problem with an entropy regularization term. Other heuristics such as CLEAN are ...
    • Near-infrared imaging and spectroscopy of the nuclear region of the disturbed Virgo cluster spiral NGC4438 
      Pérez, Sebastián; Casassus Montero, Simón; Cortés, Juan R.; Kenney, Jeffrey D. P. (2009)
      We present near-infrared (NIR) Very Large Telescope (VLT) Infrared Spectrometer and Array Camera (ISAAC) imaging and spectroscopy of the peculiar Virgo galaxy NGC4438, whose nucleus has been classified as a low-ionization ...
    • Observability of planet-disc interactions in CO kinematics 
      Pérez, Sebastián; Casassus Montero, Simón; Benítez-Llambay, P. (Oxford University Press, 2018)
      Empirical evidence of planets in gas-rich circumstellar discs is required to constrain giant planet formation theories. Here we study the kinematic patterns which arise from planet- disc interactions and their observability ...