Browsing by Author "XX644845"

Now showing items 1-20 of 70

    • A gap in the planetesimal disc around HD 107146 and asymmetric warm dust emission revealed by ALMA 
      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 ...
    • A tale of two transition disks: alma long-baseline observations of iso-oph 2 reveal two closely packed ... 
      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 ...
    • Accretion kinematics through the warped transition disk in hd142527 from resolved CO(6-5) observations 
      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 ...
    • ALMA 1.3 mm map of the HD 95086 system 
      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 ...
    • ALMA study of the HD 100453 AB system and the tidal interaction of the companion with the disk 
      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 ...
    • An 80 au cavity in the disk around HD 34282 
      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 ...
    • An inner warp in the DoAr 44 T Tauri transition disc 
      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 ...
    • ANOMALOUS MICROWAVE EMISSION FROM THE H II REGION RCW175 
      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) ...
    • Azimuthal asymmetries in the debris disk around HD61005 A massive collision of planetesimals? 
      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 ...
    • Bayesian image reconstruction based on Voronoi diagrams 
      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 ...
    • Bayesian Image Reconstruction Based on Voronoi Diagrams 
      Cabrera Vives, Guillermo (Universidad de ChilePrograma Cybertesis, 2008)
    • Characterization of low-mass companion HD 142527 B 
      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 ...
    • Cm-wavelength observations of MWC 758: Resolved dust trapping in a vortex 
      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 ...
    • Co gas inside the protoplanetary disk cavity in HD142527: disk structure from ALMA 
      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 ...
    • A compact concentration of large grains in the HD 142527 protoplanetary dust trap 
      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 ...
    • A Compact Concentration of Large Grains in the HD 142527 Protoplanetary Dust Trap 
      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 ...
    • Compact Dust Concentration in the MWC 758 Protoplanetary Disk 
      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 ...
    • Compact dust concentration in the mwc 758 protoplanetary disk 
      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 ...
    • Cooling in the shade of warped transition discs 
      Casassus Montero, Simón; Pérez, Sebastián; Osses, Axel; Marino, Sebastián (Oxford University Press, 2019)
      © 2019 The Author(s).The mass of the gaseous reservoir in young circumstellar discs is a crucial initial condition for the formation of planetary systems, but estimates vary by orders of magnitude. In some discs with ...
    • Discovery of concentric broken rings at sub-arcsec separations in the HD141569A gas-rich, debris disk with ... 
      Perrot, C.; Boccaletti, A.; Pantin, Enrique; Augereau, Jean-Charles; Lagrange, Anne Marie; Galicher, R.; Maire, Anne-Lise; Mazoyer, Mille; Rousset, G.; Gratton, R.; Bonnefoy, M.; Brandner, W.; Buenzli, E.; Langlois, M.; Lannier, J.; Mesa, D.; Peretti, S.; Salter, G.; Sissa, Elena; Chauvin, G.; Desidera, S.; Feldt, M.; Vigan, A.; Di Folco, E.; Dutrey, A.; Pericaud, J.; Baudoz, P.; Benisty, Myriam; De Boer, J.; Garufi, A.; Girard, Julien H.; Ménard, Francois; Olofsson, J.; Quanz, S. P.; Mouillet, David; Christiaens, Valentin; Casassus Montero, Simón; Beuzit, Jean-Luc; Blanchard, P.; Carle, M.; Fusco, T.; Giro, E.; Hubin, N.; Maurel, D.; Moeller-Nilsson, O.; Sevin, A.; Weber, L. (EDP Sciences, 2016)
      Context. Transition disks correspond to a short stage between the young protoplanetary phase and older debris phase. Along this evolutionary sequence, the gas component disappears leaving room for a dust-dominated environment ...