Browsing by Author "López Morales, Sebastián"

Now showing items 1-15 of 15

    • A morpho-kinematic model of the high-redshift circumgalactic medium constrained by quasar absorption lines 
      Hamel Bravo, Magdalena Jesús (Universidad de Chile, 2022)
      El medio circumgalacico (CGM) corresponde al gas que rodea una galaxia, pero sigue gravitacionalmente ligado a esta. Este componente es de suma importancia en el campo de evolución galactica, ya que provee el combustible ...
    • A study of the invisible circum-galactic medium around A z=0.77 star-forming galaxy using gravitational-ARC ... 
      Fernández Figueroa, Antonia Isabel (Universidad de Chile, 2021)
      Gravitational arc-tomography is a novel technique that allows one to study the absorbing high-redshift circum-galactic medium (CGM) in a two-dimensional fashion by using giant gravitational arcs as background sources. ...
    • Astronomy - The universe measured with a comb 
      López Morales, Sebastián (AMER ASSOC ADVANCEMENT SCIENCE, 2008-09-05)
      A technique for wavelength calibration promises to revolutionize observational astrophysics, in areas including planet searches and cosmology.
    • Espectroscopia de transmisión con telescopios terrestres: El caso de HD209458B 
      Astudillo Defru, Nicola (Universidad de Chile, 2011)
      Este trabajo de investigaci on se enmarca en el t opico de planetas extrasolares y la caracterizaci on de sus atm osferas. A la fecha, m as de 600 exoplanetas han sido descubiertos mediante distintas t ecnicas, siendo la ...
    • Galaxy clusters in the line of sight to background quasars – II. Environmental effects on the sizes of ... 
      Padilla, Nelson; Lacerna, Iván; López Morales, Sebastián; Barrientos, L. Felipe; Lira Teillery, Paulina; Andrews, Heather; Tejos, Nicolás (2009)
      Based on recent results on the frequency of Mg II absorption-line systems in the spectra of QSO behind RCS clusters (QbC), we analyse the effects of the cluster environment on the sizes of baryonic haloes around galaxies. ...
    • GRB090426: the environment of a rest-frame 0.35-s gamma-ray burst at a redshift of 2.609 
      Levesque, Emily M.; Bloom, Joshua S.; Butler, Nathaniel R.; Perley, Daniel; Cenko, S. Bradley; Prochaska, Xavier; Kewley, Lisa; Bunker, Andrew; Chen, Hsiao-Wen; Chornock, Ryan; Filippenko, Alexei V.; Glazebrook, Karl; López Morales, Sebastián; Masiero, Joseph; Modjaz, Maryam; Morgan, Adam; Poznanski, Dovi (2010)
      We present the discovery of an absorption-line redshift of z = 2.609 for GRB 090426, establishing the first firm lower limit to a redshift for a gamma-ray burst (GRB) with an observed duration of <2 s.With a rest-frame ...
    • The multiwavelength survey by Yale-Chile (MUSYC): Survey design and deep public UBVRIZ ' images and catalogs ... 
      Gawiser, Eric; van Dokkum, Pieter; Herrera, David; Maza Sancho, José; Castander, Francisco; Infante, Leopoldo; Lira Teillery, Paulina; Quadri, Ryan; Toner, Ruth; Treister, Ezequiel; Urry, C. Megan; Altmann, Martin; Assef, Roberto; Christlein, Daniel; Coppi, Paolo S.; Durán, María Fernanda; Franx, Marijn; Galaz, Gaspar, 1967-; Huerta, Leonor; Liu, Charles; López Morales, Sebastián; Méndez Bussard, René Alejandro; Moore, David C.; Rubio López, Mónica; Ruiz González, María Teresa; Toft, Sune; Yi, Sukyoung K. (UNIV CHICAGO PRESS, 2006-01)
      We present UBVRIz' optical images taken with MOSAIC on the CTIO 4 m telescope of the 0.32 deg(2) Extended Hubble Deep Field-South. This is one of four fields comprising the MUSYC survey, which is optimized for the study ...
    • A NEARLY SYMMETRIC DOUBLE-IMAGE GRAVITATIONAL LENS 
      Winn, Joshua N.; Hewitt, Jacqueline N.; Patnaik, Alok R.; Schechter, Paul L.; Schommer, Robert A.; López Morales, Sebastián; Maza Sancho, José; Wachter, Stefanie (2001-03)
      We report the discovery of a new double-image gravitational lens, resulting from our search for lenses in the southern sky. Radio source PMN J2004[1349 is composed of two compact components separated by 1A.13 in VLA, ...
    • The neutral hydrogen cosmological mass density at z = 5 
      Crighton, Neil; Murphy, Michael; Xavier, J.; Worseck, Gábor; Rafelski, Marc; Becker, George; Ellison, Sara L.; Fumagalli, Michele; López Morales, Sebastián; Meiksin, Avery; O’Meara, John (The Royal Astronomical Society, 2015)
      We present the largest homogeneous survey of z > 4.4 damped Lyα systems (DLAs) using the spectra of 163 QSOs that comprise the Giant Gemini GMOS (GGG) survey. With this survey we make the most precise high-redshift ...
    • On the incidence of strong MgII absorbers along gamma-ray burst sight lines 
      Prochter, Gabriel E.; Prochaska, Jason X.; Chen, Hsiao-Wen; Bloom, Joshua S.; Dessauges-Zavadsky, Miroslava; Foley, Ryan J.; López Morales, Sebastián; Pettini, Max; Dupree, Andrea K.; Guhathakurta, P. (UNIV CHICAGO PRESS, 2006-09-10)
      We report on a survey for strong ( rest equivalent width W-r >= 1 angstrom) intervening Mg II systems along the sight lines to long-duration gamma-ray bursts (GRBs). The GRB spectra that comprise the survey have a heterogeneous ...
    • Photometric classification of quasars from RCS-2 using Random Forest 
      Carrasco, D.; Barrientos, L.; Pichara, K.; Anguita, T.; Murphy, D.; Gilbank, D.; Gladders, M.; Yee, H.; Hsieh, B.; López Morales, Sebastián (EDP Sciences, 2015)
      The classification and identification of quasars is fundamental to many astronomical research areas. Given the large volume of photometric survey data available in the near future, automated methods for doing so are ...
    • Sharpening quasar absorption lines with ESPRESSO? Temperature of warm gas at z ~2, constraints on the Mg ... 
      Noterdaeme, Pasquier; Balashev, S.; Ledoux, C.; Duchoquet, G.; López Morales, Sebastián; Telikova, K.; Boissé, P.; Krogager, J. K.; De Cia, A.; Bergeron, J. (EDP Sciences, 2021)
      Aims. We aim to study several key physical properties of quasar absorption-line systems that are subtly encoded in their absorption profiles and have not yet been thoroughly investigated or constrained.Methods. We analysed ...
    • The Hα luminosity function of galaxies AT z ~ 4.5 
      Bollo Doizi, María Victoria (Universidad de Chile, 2022)
      The Luminosity Function (LF) is one of the most fundamental observables to study galaxies; moreover, choosing a luminosity tracer that strongly correlates with the Star Formation Rate (SFR) allows us to study the evolution ...
    • THE MULTIWAVELENGTH SURVEY BY YALE-CHILE (MUSYC): SURVEY DESIGN AND DEEP PUBLIC UBVRIz0 IMAGES AND CATALOGS ... 
      Gawiser, Eric; van Dokkum, Pieter; Herrera, David; Maza Sancho, José; Castander, Francisco; Infante, Leopoldo; Lira Teillery, Paulina; Quadri, Ryan; Toner, Ruth; Treister, Ezequiel; Urry, C. Megan; Altmann, Martín; Assef, Roberto; Christlein, Daniel; Coppi, Paolo; Durán, María Fernanda; Marijn, Franx; Galaz, Gaspar, 1967-; Huerta, Leonor; Charles, Liu; López Morales, Sebastián; Méndez Bussard, René Alejandro; Moore, David C.; Rubio López, Mónica; Ruiz González, María Teresa; Sune, Toft; Sukyoung K., Yi (IOP Publishing., 2006-01)
      We present UBVRIz0 optical images taken with MOSAIC on the CTIO 4 m telescope of the 0.32 deg2 Extended Hubble Deep Field–South. This is one of four fields comprising the MUSYC survey, which is optimized for the study ...
    • The UVES large program for testing fundamental physics – II. Constraints on a change in μ towards quasar ... 
      Rahmani, Hadi.; Wend, Martin; Srianand, Raghunathan; Noterdaeme, Pasquier; Petitjean, Patrick; Molaro, Paolo; Whitmore, Jonathan; Murphy, Michael; Centurion, M.; Fathivavsari, Hassan; D'Odorico, Sandro; Evans, Tyler; Levshakov, Sergei Anatolievich; López Morales, Sebastián; Martins, C. J. A. P.; Reimers, D.; Vladilo, Giovanni (Royal Astronomical of Society, 2013-08-22)
      We present an accurate analysis of the H2 absorption lines from the zabs ˜ 2.4018 damped Lyα system towards HE 0027-1836 observed with the Very Large Telescope Ultraviolet and Visual Echelle Spectrograph (VLT/UVES) as a ...