Browsing by Author "Hales, A."

Now showing items 1-10 of 10

    • 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 ...
    • CO(6−5) and [C i](2−1) pointed observations of five protoplanetary disks: Warm gas in HD 142527 
      Casassus Montero, Simón; Hales, A.; De Gregorio Monsalvo, Itziar; Dent, B.; Belloche, A.; Güsten, R.; Ménard, Francois; Hughes, A.M.; Wilner, D.; Salinas, V. (EDP Sciences, 2013-05)
      Context. The molecular gas in protoplanetary disks can be traced with single-dish instruments in low J rotational lines of CO, in systems clear of coincident extended emission. Other rotational lines of CO also sample the ...
    • 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 ...
    • Gas Inside the 97 AU Cavity around the Transition Disk Sz 91 
      Canovas, H.; Schreiber, M. R.; Cáceres, C.; Ménard, Francois; Pinte, Christophe; Mathews, G.; Cieza, L.; Casassus Montero, Simón; Hales, A.; Williams, J. P.; Román, P.; Hardy, A. (The American Astronomical Society, 2015-05-20)
      We present ALMA (Cycle 0) band 6 and band 3 observations of the transition disk Sz 91. The disk inclination and position angle are determined to be i = 49◦ . 5 ± 3◦ . 5°and PA = 18◦ . 2 ± 3◦ . 5 and the dusty and ...
    • Molecular Gas Clumps from the Destruction of Icy Bodies in the β Pictoris Debris Disk 
      Dent, William R. F.; Wyatt, M. C.; Roberge, A.; Augereau, J. C.; Casassus Montero, Simón; Corder, C.; Greaves, J. S.; De Gregorio Monsalvo, Itziar; Hales, A.; Jackson, A. P.; Meredith Hughes, A.; Lagrange, Anne Marie; Matthews, B.; Wilner, D. (2014-03-28)
      Many stars are surrounded by disks of dusty debris formed in the collisions of asteroids, comets, and dwarf planets, but is gas also released in such events? Observations at submillimeter wavelengths of the archetypal ...
    • Near-infrared imaging polarimetry of HD142527 
      Canovas, H.; Ménard, Francois; Hales, A.; Jordán, A.; Schreiber, M. R.; Casassus Farran, Simón; Gledhill, T. M.; Pinte, Christophe (EDP Sciences, 2013)
      Context. HD142527 is a pre-transition disk with strong evidence for ongoing planet formation. Recent observations show a disrupted disk with spiral arms, a dust-depleted inner cavity and the possible presence of gas streams ...
    • Probing protoplanetary disk evolution in the Chamaeleon II region 
      Villenave, M.; Ménard, F.; Dent, W. R. F.; Benisty, Myriam; Van der Plas, G.; Williams, J. P.; Ansdell, M.; Ribas, A.; Cáceres, C.; Cánovas, H.; Cieza, L.; Hales, A.; Kamp, I.; Pinte, C.; Principe, D. A.; Schreiber, M. R. (EDP Sciences, 2021)
      Context. Characterizing the evolution of protoplanetary disks is necessary to improve our understanding of planet formation. Constraints on both dust and gas are needed to determine the dominant disk dissipation ...
    • STRUCTURE AND COMPOSITION OF TWO TRANSITIONAL CIRCUMSTELLAR DISKS IN CORONA AUSTRALIS 
      Hughes, A. M.; Andrews, S. M.; Wilner, D. J.; Meyer, M. R.; Carpenter, J. M.; Qi, C.; Hales, A.; Casassus Montero, Simón; Hogerheijde, M. R.; Mamajek, E. E.; Wolf, S.; Henning, Thomas; Silverstone, M. D. (IOP PUBLISHING LTD, 2010-09)
      The late stages of evolution of the primordial circumstellar disks surrounding young stars are poorly understood, yet vital to constraining theories of planet formation. We consider basic structural models for the disks ...
    • The dynamically disrupted GAP in HD 142527 
      Casassus Montero, Simón; Pérez M., S.; Jordán, A.; Ménard, Francois; Cuadra, J.; Schreiber, M. R.; Hales, A.; Ercolano, B. (IOP PUBLISHING LTD, 2012-08-01)
      The vestiges of planet formation have been observed in debris disks harboring young and massive gaseous giants. The process of giant planet formation is terminated by the dissipation of gas in the protoplanetary disk. The ...
    • Unveiling the gas-and-dust disk structure in HD 163296 using ALMA observations 
      De Gregorio Monsalvo, Itziar; Ménard, Francois; Dent, W.; Pinte, Christophe; López Saavedra, Celso; Klaassen, C.; Hales, A.; Cortés, P.; Rawlings, M. G.; Tachihara, K.; Testi, L.; Takahashi, S.; Chapillon, E.; Mathews, G.; Juhasz, A.; Akiyama, E.; Higuchi, Aya; Saito, M.; Nyman, L. A.; Phillips, N.; Rodón, J.; Corder, S.; Van Kempen, T. (EDP Sciences, 2013)
      Aims. The aim of this work is to study the structure of the protoplanetary disk surrounding the Herbig Ae star HD 163296. Methods. We used high-resolution and high-sensitivity ALMA observations of the CO(3–2) emission ...