Browsing by Author "Pérez, Sebastián"

Now showing items 1-17 of 17

    • A dusty filament and turbulent CO spirals in HD 135344B-SAO 206462 
      Casassus, Simon; Christiaens, Valentin; Carcamo, Miguel; Pérez, Sebastián; Weber, Philipp; Ercolano, Barbara; van der Marel, Nienke; Pinte, Christophe; Dong, Ruobing; Baruteau, Clement; Cieza, Lucas; van Dishoeck, Ewine F.; Jordán, Andrés; Price, Daniel J.; Absil, Olivier; Arce Tord, Carla Alessandra; Faramaz, Virginie; Flores, Christian; Reggiani, Maddalena (Oxford, 2021)
      Planet-disc interactions build up local pressure maxima that may halt the radial drift of protoplanetary dust, and pile it up in rings and crescents. ALMA observations of the HD 135344B disc revealed two rings in the thermal ...
    • 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 ...
    • A co survey in planet-forming disks: characterizing the gas content in the epoch of planet formation 
      Hales, A.; De Gregorio Monsalvo, Itziar; Montesinos, B.; Casassus Montero, Simón; Dent, William R. F.; Dougados, Catherine; Eiroa, C.; Hughes, A.M.; Garay Brignardello, Guido; Mardones Pérez, Diego; Ménard, Francois; Palau, Aina; Pérez, Sebastián; Phillips, N.; Torrelles, J. M.; Wilner, D. (The American Astronomical Society., 2014-07-31)
      We carried out a 12CO(3-2) survey of 52 southern stars with a wide range of IR excesses (L IR/L *) using the single-dish telescopes APEX and ASTE. The main aims were (1) to characterize the evolution of molecular gas in ...
    • 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 ...
    • 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 ...
    • Disks around T tauri stars with SPHERE (DARTTS-S). I. SPHERE/IRDIS polarimetric imaging of eight prominent ... 
      Avenhaus, Henning; Quanz, Sascha P.; Garufi, Antonio; Pérez, Sebastián; Casassus Montero, Simón; Pinte, Christophe; Bertrang, Gesa H. -M; Cáceres, Claudio; Benisty, Myriam; Dominik, Carsten (IOP Publishing, 2018)
      We present the first part of our Disks ARound T Tauri Stars with SPHERE (DARTTS-S) survey: observations of eight T Tauri stars that were selected based on their strong (sub)millimeter excesses using SPHERE/IRDIS polarimetric ...
    • The inner environment of Z Canis Majoris: High-contrast imaging polarimetry with NaCo 
      Canovas, H.; Pérez, Sebastián; Dougados, C.; de Boer, J.; Ménard, Francois; Casassus Montero, Simón; Schreiber, M. R.; Cieza, L. A.; Caceres, C.; Girard, J. H. (EDP SCIENCES, 2015)
      Context. Z CMa is a binary composed of an embedded Herbig Be and an FU Ori class star separated by ∼100 au. Observational evidence indicates a complex environment in which each star has a circumstellar disk and drives a ...
    • 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 ...
    • Planet Formation Signposts: Observability of Circumplanetary Disks Via Gas Kinematics 
      Pérez, Sebastián; Dunhill, A.; Casassus Montero, Simón; Román Asenjo, Pablo; Szulágyi, J.; Flores, C.; Marino Estay, Sebastián; Montesinos, Matías (IOP, 2015)
      The identification of on-going planet formation requires the finest angular resolutions and deepest sensitivities in observations inspired by state-of-the-art numerical simulations. Hydrodynamic simulations of ...
    • Planet Formation Signposts: Observability of Circumplanetary Disks via Gas Kinematics 
      Pérez, Sebastián; Dunhill, A.; Casassus Montero, Simón; Roman, P.; Szulágyi, J.; Flores, C.; Marino, S.; Montesino, M. (The American Astronomical Society, 2015-09-20)
      The identification of ongoing planet formation requires the finest angular resolutions and deepest sensitivities in observations inspired by state-of-the-art numerical simulations. Hydrodynamic simulations of planet–dis ...
    • Protoplanetary Disks Including Radiative Feedback from Accreting Planets 
      Montecinos Armijo, Matías; Cuadra, Jorge; Pérez, Sebastián; Baruteau, C.; Casassus Montero, Simón (The American Astronomical Society, 2015)
      While recent observational progress is converging on the detection of compact regions of thermal emission due to embedded protoplanets, further theoretical predictions are needed to understand the response of a ...
    • Shadows Cast by a Warp in the HD 142527 Protoplanetary Disk 
      Marino Estay, Sebastián; Pérez, Sebastián; Casassus Montero, Simón (The American Astronomical Society, 2015-01-10)
      Detailed observations of gaps in protoplanetary disks have revealed structures that drive current research on circumstellar disks. One such feature is the two intensity nulls seen along the outer disk of the HD 142527 ...
    • Sparse aperture masking observations of the FL Cha pre-transitional disk 
      Cieza, Lucas A.; Lacour, Sylvestre; Schreiber, Matthias R.; Casassus Montero, Simón; Jordán, Andrés; Mathews, Geoffrey S.; Cánovas, Héctor; Ménard, Francois; Kraus, Adam L.; Pérez, Sebastián; Tuthill, Peter; Ireland, Michael J. (The American Astronomical Society, 2013)
      We present deep Sparse Aperture Masking (SAM) observations obtained with the ESO Very Large Telescope of the pre-transitional disk object FL Cha (SpT = K8, d = 160 pc), the disk of which is known to have a wide optically thin ...
    • Spatially resolved HCN J = 4-3 and CS J = 7-6 emission from the disk around HD 142527 
      Van der Plas, Gerrit; Casassus Montero, Simón; Ménard, Francois; Pérez, Sebastián; Thi, W. F.; Pinte, Christophe; Christiaens, Valentin (The American Astronomical Society, 2014-09-10)
      The disk around HD 142527 attracts a great amount of attention compared to others because of its resolved (sub-)millimeter dust continuum that is concentrated into the shape of a horseshoe toward the north of the star. ...
    • Spiral Arms in the Disk of HD 142527 from CO Emission Lines with ALMA 
      Christiaens, Valentin; Casassus Montero, Simón; Pérez, Sebastián; Van der Plas, Gerrit; Ménard, Francois (2014-04-10)
      In view of both the size of its gap and the previously reported asymmetries and near-infrared spiral arms, the transition disk of the Herbig Fe star HD 142527 constitutes a remarkable case study. This paper focuses on ...
    • The morphology of CSCha circumbinary disk suggesting the existence of a saturn-mass planet 
      Kurtovic, N. T.; Pinilla, P.; Penzlin, Anna B. T.; Benisty, Myriam; Pérez Muñoz, Laura María; Ginski, Christian; Isella, Andrea; Kley, Wilhelm; Menard, Francois; Pérez, Sebastián; Bayo, A. (EDP Sciences, 2022)
      Context. Planets have been detected in circumbinary orbits in several different systems, despite the additional challenges faced during their formation in such an environment. Aims. We investigate the possibility of ...