Now showing items 1-20 of 78

    • Marino, S.; Carpenter, J.; Wyatt, M.; Booth, M.; Casassus Montero, Simón; Faramaz, V.; Guzman, V.; Hughes, A.; Isella, A.; Kennedy, G.; Matra, L.; Ricci, L.; Corder, S. (Oxford University Press, 2018)
      While detecting low mass exoplanets at tens of au is beyond current instrumentation, debris discs provide a unique opportunity to study the outer regions of planetary systems. Here we report new ALMA observations of the ...
    • González Ruilova, Camilo; Cieza, Lucas A.; Hales, Antonio S.; Pérez, Sebastián; Zurlo, A.; Arce Tord, Carla; Casassus Montero, Simón; Canovas, Héctor; Flock, Mario; Herczeg, Gregory J.; Pinilla, Paola; Price, Daniel J.; Príncipe, David A.; Ruiz Rodríguez, Dary; Williams, Jonathan P. (IOP Publishing, 2020)
      ISO-Oph 2 is a wide-separation (240 au) binary system where the primary star harbors a massive (M-dust similar to 40M(circle plus)) ring-like disk with a dust cavity similar to 50 au in radius and the secondary hosts a ...
    • Casassus Montero, Simón; Marino Estay, Sebastián; Pérez, S.; Román, P.; Dunhill, A.; Armitage, P. J.; Cuadra, J.; Wootten, A.; Van der Plas, Gerrit; Cieza, L.; Moral, Víctor; Christiaens, V.; Montesinos, Matías (IOP Publishing, 2015)
      The finding of residual gas in the large central cavity of the HD 142527 disk motivates questions regarding the origin of its non-Keplerian kinematics and possible connections with planet formation. We aim to understand ...
    • Su, Kate Y. L.; MacGregor, Meredith A.; Booth, Mark; Wilner, David J.; Flaherty, Kevin; Hughes, A. Meredith; Phillips, Neil M.; Malhotra, Renu; Hales, Antonio S.; Morrison, Sarah; Ertel, Steve; Matthews, Brenda C.; Dent, William R. F.; Casassus Montero, Simón (IOP Publishing Ltd., 2017)
      Planets and minor bodies such as asteroids, Kuiper-Belt objects, and comets are integral components of a planetary system. Interactions among them leave clues about the formation process of a planetary system. The signature ...
    • Van Der Plas, G.; Ménard, F.; Gonzalez, J. F.; Perez, S.; Rodet, L.; Pinte, C.; Cieza, L.; Casassus Montero, Simón; Benisty, Myriam (EDP Sciences, 2019)
      Context. The complex system HD 100453 AB with a ring-like circumprimary disk and two spiral arms, one of which is pointing to the secondary, is a good laboratory in which to test spiral formation theories. Aims. We aim to ...
    • Van der Plas, Gerrit; Menard, F.; Canovas, H.; Avenhaus, H.; Casassus Montero, Simón; Pinte, Christophe; Cáceres, C.; Cieza, L. (EDP Sciences, 2017)
      Context. Large cavities in disks are important testing grounds for the mechanisms proposed to drive disk evolution and dispersion, such as dynamical clearing by planets and photoevaporation. Aims. We aim to resolve the ...
    • Casassus Montero, Simón; Avenhaus, Henning; Pérez, Sebastián; Navarro, Víctor; Cárcamo, Miguel; Marino, Sebastián; Cieza, Luca; Quanz, Sascha P.; Alarcón, Felipe; Zurlo, Alice; Osses Alvarado, Axel; Rannou, Fernando R.; Román, Pablo E.; Barraza, Marcelo (Oxford University Press, 2018-07)
      Optical/IR images of transition discs (TDs) have revealed deep intensity decrements in the rings of HAeBes HD 142527 and HD 100453 that can be interpreted as shadowing from sharply tilted inner discs, such that the outer ...
    • Casassus Montero, Simón (IOP PUBLISHING LTD, 2009-01-10)
      We present evidence for anomalous microwave emission in the RCW175 H II region. Motivated by 33 GHz 13' resolution data from the Very Small Array (VSA), we observed RCW175 at 31 GHz with the Cosmic Background Imager ( CBI) ...
    • Olofsson, J.; Samland, M.; Avenhaus, Henning; Cáceres, C.; Henning, Thomas; Moor, A.; Milli, Julien; Cánovas, Héctor; Quanz, Sascha; Schreiber, Matthias; Augereau, J. C.; Bayo, A.; Bazzon, A.; Beuzit, J.L.; Boccaletti, Anthony; Buenzli, E.; Casassus Montero, Simón; Chauvin, G.; Dominik, C.; Desidera, S.; Feldt, M.; Gratton, R.; Janson, M.; Lagrange, Anne Marie; Langlois, Maud; Lannier, J.; Maire, Anne-Lise; Mesa, D.; Pinte, Christophe; Rouan, D.; Salter, G.; Thalmann, Christian; Vigan, A. (EDP Sciences, 2016)
      Context. Debris disks off er valuable insights into the latest stages of circumstellar disk evolution, and can possibly help us to trace the outcomes of planetary formation processes. In the age range 10 to 100 Myr, most ...
    • Cabrera, G. F.; Casassus Montero, Simón; Hitschfeld Kahler, Nancy (UNIV CHICAGO PRESS, 2008-01-10)
      We present a Bayesian Voronoi image reconstruction ( VIR) technique for interferometric data. Bayesian analysis applied to the inverse problem allows us to derive the a posteriori probability of a novel parameterization ...
    • Cabrera Vives, Guillermo (Universidad de ChilePrograma Cybertesis, 2008)
    • Christiaens, V.; Casassus Montero, Simón; Absil, O.; Kimeswenger, S.; Gómez González, Carlos; Girard, J.; Ramírez, R.; Wertz, O.; Zurlo, A.; Wahhaj, Z.; Flores, C.; Salinas, V.; Jordán, A.; Mawet, D. (EDP Sciences, 2018)
      Context. The circumstellar disk of the Herbig Fe star HD 142527 is host to several remarkable features including a warped inner disk, a 120 au-wide annular gap, a prominent dust trap and several spiral arms. A low-mass ...
    • Price, Daniel J.; Cuello, Nicolás; Pinte, Christophe; Mentiplay, Daniel; Casassus Montero, Simón; Christiaens, Valentin; Kennedy, Grant M.; Cuadra, Jorge; Pérez M., Sebastián; Marino, Sebastian; Armitage, Philip J.; Zurlo, Alice; Juhasz, Attila; Ragusa, Enrico; Laibe, Guillaume; Lodato, Giuseppe (Oxford University Press, 2018-06)
      We present 3D hydrodynamical models of the HD 142527 protoplanetary disc, a bright and well-studied disc that shows spirals and shadows in scattered light around a 100 au gas cavity, a large horseshoe dust structure in mm ...
    • Price, Daniel; Cuello, Nicolás; Pinte, Christophe; Mentiplay, Daniel; Casassus Montero, Simón; Christiaens, Valentín; Kennedy, Grant; Cuadra, Jorge; Pérez, Sebastián; Marino, Sebastián; Armitage, Philip; Zurlo, Alice; Juhasz, Attila; Ragusa, Enrico; Laibe, Guillaum; Lodato, Giuseppe (Oxford University Press, 2018)
      We present 3D hydrodynamical models of the HD142527 protoplanetary disc, a bright and well studied disc that shows spirals and shadows in scattered light around a 100 au gas cavity, a large horseshoe dust structure in ...
    • Casassus Montero, Simón; Marino, Sebastián; Lyra, Wladimir; Baruteau, Clément; Vidal, Matías; Wootten, Alwyn; Pérez, Sebastián; Alarcon, Felipe; Barraza, Marcelo; Cárcamo, Miguel; Dong, Ruobing; Sierra, Anibal; Zhu, Zhaohuan; Ricci, Luca; Christiaens, Valentin; Cieza, Lucas (Oxford University Press, 2019)
      © 2018 The Author(s)The large crescents imaged by ALMA in transition discs suggest that azimuthal dust trapping concentrates the larger grains, but centimetre–wavelengths continuum observations are required to map the ...
    • Pérez, S.; Casassus Montero, Simón; Ménard, Francois; Román, P.; Van der Plas, Gerrit; Cieza, L.; Pinte, Christophe; Christiaens, V.; Hales, A. (IOP Pub, 2015)
      Inner cavities and annular gaps in circumstellar disks are possible signposts of giant planet formation. The young star HD142527 hosts a massive protoplanetary disk with a large cavity that extends up to 140 AU from the ...
    • Casassus Montero, Simón; Wright, Chris; Marino, Sebastian; Maddison, Sarah; Wootten, Al; Roman, Pablo; Pérez, Sebastian; Pinilla, Paola; Wyatt, Mark; Moral, Victor; Ménard, Francois; Christiaens, Valentin; Cieza, Lucas; Van der Plas, Gerrit (The American Astronomical Society, 2015-10-20)
      A pathway to the formation of planetesimals, and eventually giant planets, may occur in concentrations of dust grains trapped in pressure maxima. Dramatic crescent-shaped dust concentrations have been seen in recent ...
    • Casassus Montero, Simón; Wright, Chris; Marino Estay, Sebastián; Maddison, Sarah T.; Wootten, Al; Román Asenjo, Pablo; Pérez, Sebastián; Pinilla, Paola; Wyatt, Mark; Moral, Víctor; Ménard, Francois; Christiaens, Valentín; Cieza, Lucas; Van der Plas, Gerrit (IOP Publishing, 2015)
      A pathway to the formation of planetesimals, and eventually giant planets, may occur in concentrations of dust grains trapped in pressure maxima. Dramatic crescent-shaped dust concentrations have been seen in recent radio ...
    • Marino Estay, Sebastián; Casassus Montero, Simón; Perez, Sebastián; Lyra, W.; Roman, P.; Avenhaus, H.; Wright, C. M.; Maddison, S. T. (The American Astronomical Society, 2015-11-01)
      The formation of planetesimals requires that primordial dust grains grow from micron- to kilometer-sized bodies. Dust traps caused by gas pressure maxima have been proposed as regions where grains can concentrate and ...
    • Marino Estay, Sebastián; Casassus Montero, Simón; Pérez, Sebastián; Lyra, W.; Román, P.; Avenhaus, H.; Wright, C. M.; Maddison, S. T. (IOP Publishing, 2015)
      The formation of planetesimals requires that primordial dust grains grow from micron- to km-sized bodies. Dust traps caused by gas pressure maxima have been proposed as regions where grains can concentrate and grow fast ...