Now showing items 1-19 of 19

    • A large scale CO survey of the Galactic center region 

      Bitrán, M.; Álvarez Moreno, Héctor Julio; Bronfman Aguiló, Leonardo; May Humeres, Jorge; Thaddeus, P. (1997-10)
      We present the data from a CO(J = 1 --> 0) survey of the central region of our Galaxy. The observations were obtained with the 1.2-m Southern Millimeter-wave Telescope at Cerro Tololo Interamerican Observatory, Chile. This ...
    • All-sky Galactic radiation at 45 MHz and spectral index between 45 and 408 MHz 

      Guzmán, A. E.; May Humeres, Jorge; Álvarez Moreno, Héctor Julio; Maeda, K. (EDP SCIENCES, 2011-01)
      Aims. We study the Galactic large-scale synchrotron emission by generating a reliable all-sky spectral index map and temperature map at 45 MHz. Methods. We use our observations, the published all-sky map at 408 MHz, ...
    • Distance limits on the bright X-ray emission toward the Galactic center: Evidence for a very hot interstellar medium in the Galactic X-ray bulge 

      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 ...
    • Extended mosaic observations with the Cosmic Background Imager 

      Readhead, A. C. S.; Mason, B. S.; Contaldi, C. R.; Pearson, T. J.; Bond, J. R.; Myers, S. T.; Padin, S.; Sievers, J. L.; Cartwright, J. K.; Shepherd, M. C.; Pogosyan, D.; Prunet, S.; Altamirano, P.; Bustos, R.; Bronfman Aguiló, Leonardo; Casassus Montero, Simón; Holzapfel, W. L.; May Humeres, Jorge; Pen, U.-L.; Torres, S.; Udomprasert, P. S. (IOP PUBLISHING, 2004-07-10)
      Two years of microwave background observations with the Cosmic Background Imager ( CBI) have been combined to give a sensitive, high-resolution angular power spectrum over the range 400 < l < 3500. This power spectrum has ...
    • First intrinsic anisotropy observations with the cosmic background imager 

      Padin, S.; Cartwright, J. K.; Mason, S.; Pearson, T. J.; Readhead, A. C. S.; Shepherd, M. C.; Shevers, J.; Udomprasert, P. S.; Holzapfel, W. L.; Myers, S. T.; Carlstrom, J. E.; Leitch, E. M.; Joy, M.; Bronfman Aguiló, Leonardo; May Humeres, Jorge (UNIV CHICAGO PRESS, 2001-03-01)
      We present the first results of observations of the intrinsic anisotropy of the cosmic microwave background radiation with the Cosmic Background Imager from a site at 5080 m altitude in northern Chile. Our observations ...
    • Implications of the cosmic background imager polarization data 

      Sievers, J. L.; Achermann, C.; Bond, J. R.; Bronfman Aguiló, Leonardo; Bustos, R.; Contaldi, C. R.; Dickinson, C.; Ferreira, P. G.; Jones, M. E.; Lewis, A. M.; Mason, B. S.; May Humeres, Jorge; Myers, S. T.; Oyarce, N.; Padin, S.; Pearson, T. J.; Pospieszalski, M.; Readhead, A. C. S.; Reeves, R.; Taylor, A. C.; Torres, S. (2007)
      We present new measurements of the power spectra of the E mode of cosmic microwave background (CMB) polarization, the temperature T, the cross-correlation of E and T, and upper limits on the B mode from 2.5 yr of dedicated ...
    • An interesting nebular object in LDN 288 

      Gyulbudaghian, A. L.; May Humeres, Jorge (SPRINGER/PLENUM PUBLISHERS, 2006-10)
      In this paper the results of multiwavelength investigation of an unusual nebular object SNO 85 are presented. In 2MASS images this object looks like a star with a jet. In DSS2 R image the end of the jet is connected with ...
    • Investigation of the conspicuous infrared star cluster and star-forming region "RCW 38 IR cluster" 

      Gyulbudaghian, A. L.; May Humeres, Jorge (2008-01)
      The infrared star cluster RCW 38 IR Cluster, which is also a massive star-forming region, is investigated. The results of observations with the SEST (Cerro La Silla, Chile) telescope on the 2.6-mm (CO)-C-12 spectral line ...
    • Massive star formation in the GMC G345.5+1.0: spatial distribution of the dust emission 

      López Saavedra, Celso; Bronfman Aguiló, Leonardo; Nyman, L.-Å.; May Humeres, Jorge; Garay Brignardello, Guido (EDP SCIENCES S A, 2011-10)
      Context. Massive condensations in giant molecular clouds (GMCs) are linked to the formation of high mass stars, which are the principal source of heavy elements and UV radiation, playing an important role in the evolution ...
    • Molecular gas in the Galactic center region .1. Data from a large scale (CO)-O-18(J=1->0) survey 

      Dahmen, G.; Hüttemeister, S.; Wilson, T. L.; Mauersberger, R.; Linhart, A.; Bronfman Aguiló, Leonardo; Tieftrunk, A. R.; Meyer, K.; Wiedenhöver, W.; Dame, T. M.; Palmer, E. S.; May Humeres, Jorge; Aparici, J.; Mac-Auli, F. (EDITIONS PHYSIQUE, 1997-12)
      A large scale survey of the Galactic center region in the (CO)-O-18(J = 1 --> 0) transition is presented. This survey was obtained with the 1.2 m Southern Millimeter-Wave Telescope (SMWT) at the Cerro Tololo Interamerican ...
    • Molecular gas, kinematics, and OB star formation in the spiral arms of the southern Milky Way 

      Luna, A.; Bronfman Aguiló, Leonardo; Carrasco, L.; May Humeres, Jorge (UNIV CHICAGO PRESS, 2006-04-20)
      The rotation curve for the fourth Galactic quadrant within the solar circle is derived from the Columbia University - Universidad de Chile CO (J = 1 -> 0) survey of molecular gas. A new sampling, 4 times denser in longitude ...
    • Molecular outflows within the filamentary infrared dark cloud G34.43+0.24 

      Sanhueza, P.; Garay Brignardello, Guido; Bronfman Aguiló, Leonardo; Mardones Pérez, Diego; May Humeres, Jorge; Saito, M. (2010-05-17)
      We present molecular line observations, made with angular resolutions of 2000, toward the filamentary infrared dark cloud G34.43+0.24 using the APEX [CO(3 ! 2), 13CO(3 ! 2), C18O(3 ! 2) and CS(7 ! 6) transitions], ...
    • Photon dominated regions in NGC 3603 [CI] and mid-J CO line emission 

      Röllig, M.; Kramer, C.; Rajbahak, C.; Minamidani, T.; Sun, K.; Simon, R.; Ossenkopf, V.; Cubick, M.; Hitschfeld, M.; Aravena, M.; Bensch, F.; Bertoldi, F.; Bronfman Aguiló, Leonardo; Fujishita, M.; Fukui, Y.; Graf, U. U.; Honingh, N.; Ito, S.; Jakob, H.; Jacobs, K.; Klein, U.; Koo, B.-C.; May Humeres, Jorge; Miller, M.; Miyamoto, Y.; Mizuno, N.; Onishi, T.; Park, Y.-S.; Pineda, J.; Rabanus, D.; Sasago, H.; Schieder, R.; Stutzki, J.; Yamamoto, H.; Yonekura, Y. (2011-01)
      Aims. We aim at deriving the excitation conditions of the interstellar gas as well as the local FUV intensities in the molecular cloud surrounding NGC 3603 to get a coherent picture of how the gas is energized by the central ...
    • SIMBA survey of southern high-mass star forming regions - I. Physical parameters of the 1.2-mm/IRAS sources 

      Faúndez, S.; Bronfman Aguiló, Leonardo; Garay Brignardello, Guido; Chini, R.; Nyman, L.-Å.; May Humeres, Jorge (E D P SCIENCES, 2004-10)
      We report the results of a 1.2 mm continuum emission survey toward 146 IRAS sources thought to harbour high-mass star forming regions. The sources have FIR colors typical of UCHII regions and were detected in the CS(2 --> ...
    • STAR-FORMING REGION BBW 36 IN PUPPIS 

      Gyulbudahgian, A. L.; May Humeres, Jorge (SPRINGER/PLENUM PUBLISHERS, 2008-07)
      Recent studies of the star formation region BBW 36 and associated molecular clouds are presented. The (CO)-C-12 (1-0) observations, carried out with the 15-m SEST (Swedish-ESO) telescope (Cerro La Silla, Chile), revealed ...
    • Submillimeter line emission from LMC N159W: a dense, clumpy PDR in a low metallicity environment 

      Pineda, J. L.; Mizuno, Norikazu; Stutzki, J.; Cubick, M.; Aravena, Mauricio; Bensch, F.; Bertoldi, Frank; Bronfman Aguiló, Leonardo; Fujishita, K.; Graf, Urs U.; Hitschfeld, M.; Honingh, N.; Jakob, H.; Jacobs, K.; Kawamura, Akiko; Klein, U.; Kramer, C.; May Humeres, Jorge; Miller, M.; Mizuno, Yoji; Müller, P.; Onishi, T.; Ossenkopf, V.; Rabanus, David; Röllig, M.; Rubio López, Mónica; Sasago, H.; Schieder, R.; Simon, R.; Sun, K.; Volgenau, N.; Yamamoto, Hiroaki; Fukui, Yasuo (EDP SCIENCES S A, 2008-04)
      Context. Star formation at earlier cosmological times took place in an interstellar medium with low metallicity. The Large Magellanic Cloud (LMC) is ideally suited to study star formation in such an environment. Aims. ...
    • A survey of the Galactic center region in HCO+, H13CO+, and SiO 

      Riquelme, D.; Bronfman Aguiló, Leonardo; Mauersberger, R.; May Humeres, Jorge; Wilson, T. L. (EDP Sciences, 2010-11)
      Aims. A large-scale survey of the Galactic center region in the 3 mm rotational transitions of SiO, HCO+ and (HCO+)-C-13 (beamsize similar to 3'.6) was conducted to provide an estimate of cloud conditions, heating mechanisms, ...
    • The anisotropy of the microwave background to l=3500: Deep field observations with the cosmic background imager 

      Mason, B. S.; Pearson, T. J.; Readhead, A. C. S.; Shepherd, M. C.; Sievers, J.; Udomprasert, P. S.; Cartwright, J. K.; Farmer, A. J.; Padin, S.; Myers, S. T.; Bond, J. R.; Contaldi, C. R.; Pen, U.; Prunet, S.; Pogosyan, D.; Carlstrom, J. E.; Kovac, J.; Leitch, E. M.; Pryke. C.; Halverson, N.W.; Holzapfel, W. L.; Altamirano, P.; Bronfman Aguiló, Leonardo; Casassus Montero, Simón; May Humeres, Jorge; Joy, M. (UNIV CHICAGO PRESS, 2003-07-10)
      We report measurements of anisotropy in the cosmic microwave background radiation over the multipole range l similar to 200 3500 with the Cosmic Background Imager based on deep observations of three fields. These results ...
    • Vela X at 31 GHz 

      Hales, A. S.; Casassus Montero, Simón; Álvarez Moreno, Héctor Julio; May Humeres, Jorge; Bronfman Aguiló, Leonardo; Readhead, A. C. S.; Pearson, T. J.; Mason, B. S.; Dodson, R. (IOP PUBLISHING LTD, 2004-10-01)
      We present observations of the Vela X region at 31 GHz using the Cosmic Background Imager ( CBI). We find a strong compact radio source (5.'9 x 4.'1, FWHM) about the Vela pulsar, which we associate with the Vela pulsar ...