Browsing by Author "201-0549124"

Now showing items 21-40 of 98

    • Chemistry of the High-mass Protostellar Molecular Clump IRAS 16562-3959 
      Guzmán, Andrés; Guzmán, Viviana; Garay Brignardello, Guido; Bronfman Aguiló, Leonardo; Hechenleitner, Federico (Institute of Physics Publishing, 2018)
      We present molecular line observations of the high-mass molecular clump IRAS 16562−3959 taken at 3 mm using the Atacama Large Millimeter/submillimeter Array (ALMA) at 1. 007 angular resolution (0.014 pc spatial resolution). ...
    • Clumpy photon-dominated regions in Carina - I. [C I] and mid-J CO lines in two 4'x4' fields 
      Bronfman Aguiló, Leonardo (EDP SCIENCES S A, 2008-01)
      Context. The Carina region is an excellent astrophysical laboratory for studying the feedback mechanisms of newly born, very massive stars within their natal giant molecular clouds (GMCs) at only 2.35 kpc distance. Aims. ...
    • The CO J = 21 / J = 10 Ratio in the Large Magellanic Cloud 
      Sorai, K.; Hasegawa, T.; Booth, Roy S.; Rubio López, Mónica; Morino, J. I.; Bronfman Aguiló, Leonardo; Handa, T.; Hatashi, M.; Nyman, L. A.; Oka, T.; Sakamoto, S.; Seta, M.; Usuda, K. S. (2001-04-20)
      We observed 34 positions throughout the disk of the Large Magellanic Cloud in the CO J = 21 emission line with the Tokyo-Onsala-ESO-Calán 60 cm radio telescope. Comparing the spectra with those of the J = 10 line at the ...
    • (CO)-C-12 4-3 and [CI] 1-0 at the centers of NGC4945 and Circinus 
      Hitschfeld, M.; Aravena, M.; Kramer, C.; Bertoldi, F.; Stutzki, J.; Bensch, F.; Bronfman Aguiló, Leonardo; Cubick, M.; Fujishita, M.; Fukui, Y.; Graf, U.U; Honingh, N.; Ito, S.; Jakob, H.; Jacobs, K.; Klein, U.; Koo, B.-C.; May, J.; Miller, M.; Miyamoto, Y.; Mizuno, N.; Onishi, T.; Park, Y.-S.; Pineda, J. L.; Rabanus, D.; Röllig, M.; Sasago, H.; Schieder, R.; Simon, R.; Sun, K.; Volgenau, N.; Yamamoto, H.; Yonekura, Y. (EDP SCIENCES S A, 2008-02)
      Context. Studying molecular gas in the central regions of the star burst galaxies NGC4945 and Circinus enables us to characterize the physical conditions and compare them to previous local and high-z studies. Aims. We ...
    • (CO)-C-12(3-2) emission in spiral galaxies: Warm molecular gas in action? 
      Galaz, Gaspar, 1967-; Cortés, Paulo; Bronfman Aguiló, Leonardo; Rubio López, Mónica (UNIV CHICAGO PRESS, 2008-04-10)
      Using the APEX submillimeter telescope we have investigated the (CO)-C-12(3-2) emission in five face-on nearby barred spiral galaxies, where three of them are high surface brightness galaxies (HSBs) lying at the Freeman ...
    • Complex Dielectric Permittivity of Engineering and 3D-Printing Polymers at Q-Band 
      Reyes, Nicolás; Casado, Francisco; Tapia, Valeria; Jarufe, Claudio; Finger, Ricardo; Bronfman Aguiló, Leonardo (Springer New York LLC, 2018)
      We report experimental values of the complex dielectric permittivity of a wide variety of engineering polymers. Measurements were done using the filling waveguide method at Q-band (30–50 GHz), being representative of the ...
    • The Cosmic Background Imager 2 
      Taylor, Angela C.; Jones, Michael E.; Allison, James R.; Angelakis, Emmanouil; Bond, J. Richard; Bronfman Aguiló, Leonardo; Bustos, Ricardo; Davis, Richard J.; Dickinson, Clive; Leech, Jamie; Mason, Brian S.; Myers, Steven T.; Pearson, Timothy J.; Readhead, Anthony C. S.; Reeves, Rodrigo; Shepherd, Martin C.; Sievers, Jonathan L. (2011)
      We describe an upgrade to the Cosmic Background Imager instrument to increase its surface brightness sensitivity at small angular scales. The upgrade consisted of replacing the 13 0.9-m antennas with 1.4-m antennas ...
    • Design and construction of a digital sideband separating spectrometer for the 1.2-meter southern radio telescope 
      Finger Camus, Ricardo (Universidad de Chile, 2013)
      Los receptores de doble banda lateral (2SB) son particularmente útiles para la observación de espectros astronómicos complejos en un amplio rango de frecuencias. Son extensamente utilizados en radio astronomía siendo sus ...
    • Design and construction of an optical systems for a 31- 45 GHz radioastronomical receiver 
      Zorzi Avendaño, Pablo Ignacio (Universidad de Chile, 2013)
      El Atacama Large Millimeter/Submillimeter Array (ALMA) es el observatorio astronómico más grande jamás construido. Se encuentra en el llano de Chajnantor, a una altura de 5.000 metros sobre el nivel del mar en el norte de ...
    • Design of a receiver at 31-45 ghz based on HEMT amplifiers and Schottky mixers 
      Reyes Guzmán, Nicolás Andrés (Universidad de Chile, 2013)
      The Atacama Large Millimeter Array (ALMA) is an international partnership of Europe, North America and East Asia in cooperation with the Republic of Chile. It consists of an array of 66 antennas designed to work as an ...
    • Design, construction and testing of a 2SB receiver for the southern millimeter-wave telescope 
      Rodríguez Olivos, Rafael Ignacio (Universidad de Chile, 2015)
      Este trabajo presenta un prototipo de un receptor de separación de banda lateral (2SB) para el Telescopio Austral de Ondas Milimétricas (SMWT) de 1.2 m de diámetro en el marco de su modernización. Ésta consiste en cambiar ...
    • Development of a Transportable Telescope for Galactic Survey at 500 GHz in Antarctica 
      Ishii, Shun; Masumichi, Seta; Nakai, Naomasa; Miyamoto, Yusuke; Nagai, Makoto; Arai, Hitoshi; Maezawa, Hiroyuki; Taketo, Nagasaki; Miyagawa, Naoki; Motoyama, Hideaki; Sekimoto, Yutaro; Bronfman Aguiló, Leonardo (2013-01)
      We have developed a transportable 30-cm submillimeter- wave telescope to operate at the Dome Fuji station in the Antarctic plateau. Transportability is an important requirement in the design; the telescope can be divided ...
    • THE DISCOVERY OF A MOLECULAR CAVITY IN THE NORMA NEAR ARM ASSOCIATED WITH H.E.S.S γ -RAY SOURCE LOCATED IN ... 
      Luna, Abraham; Mayya, Y. D.; Carrasco, Luis; Bronfman Aguiló, Leonardo (The American Astronomical Society, 2010-04-10)
      We report on the discovery of a molecular cavity in the Norma near arm in the general direction of Westerlund 1 (Wd1), but not associated with it. The cavity has a mean radial velocity of −91.5 km s−1, which differs by ...
    • Discovery of an energetic bipolar molecular outflow towards IRAS 16547-4247 
      Garay Brignardello, Guido; Mardones Pérez, Diego; Bronfman Aguiló, Leonardo; Brooks, K. J.; Rodríguez, L. F.; Güsten, R.; Nyman, L.-Å.; Franco Hernández, Ramiro; Morán, J. M. (EDP SCIENCES S A, 2007-02)
      Aims. We present molecular line observations of the molecular core associated with IRAS 16547-4247, which have allowed us to determine its physical and kinematical properties at angular resolutions of similar to 18". ...
    • Discovery of an extremely high velocity, massive, and compact molecular outflow in Norma 
      Bronfman Aguiló, Leonardo; Garay Brignardello, Guido; Merello, Manuel; Mardones Pérez, Diego; May, Jorge; Brooks, Kate J.; Nyman, Lars-Ake; Güsten, Rolf (UNIV CHICAGO PRESS, 2008-01-01)
      G331.5-0.1 in the Norma spiral arm is one of the most luminous and extended cores of a giant molecular cloud (GMC), containing at least six massive and dense dust condensations. Here we report the discovery, from observations ...
    • Discovery of four new massive and dense cold cores 
      Garay Brignardello, Guido; Faúndez, Santiago; Mardones Pérez, Diego; Bronfman Aguiló, Leonardo (UNIV CHICAGO PRESS, 2004-07-20)
      We report the identification, from a 1.2 mm dust continuum emission survey toward massive star-forming regions, of four strong 1.2 mm sources without counterparts at mid-infrared (Midcourse Space Experiment [MSX]) and ...
    • Diseño y Fabricación de un Amplificador de Microondas de Bajo Ruido para la Banda de 31–45 GHz 
      Jarufe Troncoso, Claudio Felipe (Universidad de ChileCyberDocs, 2010)
      El proyecto ALMA (Atacama Large Millimeter Array) será el más grande arreglo de antenas para interferometría en el mundo. Los receptores para este proyecto están siendo diseñados y fabricados en diferentes laboratorios ...
    • Distance limits on the bright X-ray emission toward the Galactic center: Evidence for a very hot interstellar ... 
      Almy, R. C.; McCammon, D.; Digel, S. W.; Bronfman Aguiló, Leonardo; May Humeres, Jorge (UNIV CHICAGO PRESS, 2000-12-10)
      Observations of the diffuse X-ray background at energies similar to3/4 and 1.5 keV show a large region of enhanced emission around the Galactic center. The origin of this X-ray enhancement is not known, but the best ...
    • A Dual Ridge Broadband Orthomode Transducer for the 7-mm Band 
      Reyes Guzmán, Nicolás Andrés; Zorzi Avendaño, Pablo Ignacio; Pizarro Lucero, José; Finger Camus, Ricardo; Mena Mena, Fausto Patricio; Bronfman Aguiló, Leonardo (SPRINGER, 2012-12)
      In this work we present a Q-band waveguide orthomode transducer (OMT) based on a dual ridge structure. It was designed to be used in astronomical projects were an excellent broad-band performance is mandatory. Of particular ...
    • Emisión Anómala en Ondas Centimétricas de las Nubes Translúcidas ζ OPH y LDN 1780 
      Vidal Navarro, Matías Ambrosio (Universidad de ChileCyberDocs, 2010)