Browsing by Author "López, S."

Now showing items 1-11 of 11

    • A new measure of Delta alpha/alpha at redshift z=1.84 from very high resolution spectra of Q 1101-264 
      Levshakov, S. A.; Molaro, P.; López, S.; D'Odorico, S.; Centurión, M.; Bonifacio, P.; Agafonova, I. I.; Reimers, D. (2007)
      Aims. We probe the evolution of the fine-structure constant a with cosmic time. Methods. Accurate positions of the Fe II lines lambda 1608, lambda 2382, and lambda 2600 are measured in the z(abs) = 1.84 absorption system ...
    • AFTERGLOW OBSERVATIONS OF FERMI LARGE AREA TELESCOPE GAMMA-RAY BURSTS AND THE EMERGING CLASS OF HYPER-ENERGETIC ... 
      Cenko, S. B.; Frail, D. A.; Harrison, F. A.; Haislip, Joshua B.; Reichart, Daniel E.; Butler, N. R.; Cobb, B. E.; Cucchiara, A.; Berger, E.; Bloom, J. S.; Chandra, P.; Fox, D. B.; Perley, Daniel; Prochaska, J. X.; Filippenko, A. V.; Glazebrook, K.; Ivarsen, K. M.; Kasliwal, M. M.; Kulkarni, S. R.; LaCluyze, Aaron P.; López, S.; Morgan, A. N.; Pettini, M.; Rana, V. R. (2011-05-01)
      We present broadband (radio, optical, and X-ray) light curves and spectra of the afterglows of four long-duration gamma-ray bursts (GRBs; GRBs 090323, 090328, 090902B, and 090926A) detected by the Gamma-Ray Burst Monitor ...
    • The evolution of Lyman alpha absorbers in the redshift range 0.5 < z < 1.9 
      Janknecht, E.; Reimers, D.; López, S.; Tytler, D. (EDP SCIENCES S A, 2006-11)
      We investigate the evolution and the statistical properties of the Ly alpha absorbers of the intergalactic medium (IGM) in the largely unexplored redshift range z = 0.5-1.9. We use high-resolution (R = 30 000) UV (STIS) ...
    • Galaxy clusters in the line of sight to background quasars. I. Survey design and incidence of MgII absorbers ... 
      López, S.; Barrientos, L. Felipe; Lira Teillery, Paulina; Padilla, N.; Gilbank, D. G.; Gladders, M. D.; Maza Sancho, José; Tejos, Nicolás; Vidal, M.; Yee, H. K. C. (UNIV CHICAGO PRESS, 2008-06-01)
      We describe the first optical survey of absorption systems associated with cluster galaxies at z = 0.3-0.9. We have cross-correlated quasars from the third data release of the SDSS with high-redshift cluster/group candidates ...
    • Molecular gas budget and characterization of intermediate-mass star-forming galaxies at z approximate to 2-3 
      Solimano, M.; González López, J.; Barrientos, L. F.; Aravena, M.; López, S.; Tejos, N.; Sharon, K.; Dahle, H.; Bayliss, M.; Ledoux, C.; Rigby, J. R.; Gladders, M. (EDP Sciences, 2021)
      Star-forming galaxies (SFGs) with stellar masses below 10(10) M-circle dot make up the bulk of the galaxy population at z > 2. The properties of the cold gas in these galaxies can only be probed in very deep observations ...
    • Near-infrared spectroscopic observations of high redshift C I absorbers 
      Zou, Siwei; Petitjean, Patrick; Noterdaeme, Pasquier; Ledoux, Cédric; Krogager, J. K.; Fathivavsari, H.; Srianand, R.; López, S. (EDP Sciences, 2018)
      We study a sample of 17 $z>1.5$ C~{\sc i} absorbers observed with the ESO-VLT spectrograph X-SHOOTER. We derive metallicities, depletion onto dust, extinction by dust and analyse the absorption from Mg~{\sc ii}, Mg~{\sc ...
    • The evolution of the cosmic microwave background temperature Measurements of T(CMB) at high redshift from ... 
      Noterdaeme, P.; Petitjean, P.; Srianand, R.; Ledoux, C.; López, S. (EDP SCIENCES S A,, 2011-02)
      A milestone of modern cosmology was the prediction and serendipitous discovery of the cosmic microwave background (CMB), the radiation leftover after decoupling from matter in the early evolutionary stages of the Universe. ...
    • The evolution of the Si IV content in the Universe from the epoch of reionization to cosmic noon 
      D'Odorico, V.; Finlator, K.; Cristiani, S.; Cupani, G.; Perrotta, S.; Calura, F.; Centurion, M.; Becker, G.; Berg, T. A. M.; López, S.; Ellison, S.; Pomante, E. (Oxford, 2022)
      We investigate the abundance and distribution of metals in the high-redshift intergalactic medium and circum-galactic medium through the analysis of a sample of almost 600 Si iv absorption lines detected in high and ...
    • The SEDIGISM survey: First data release and overview of the galacti structure 
      Schuller, F.; Urquhart, J. S.; Csengeri, T.; Colombo, D.; Duarte Cabral, A.; Mattern, M.; Ginsburg, A.; Pettitt, A. R.; Wyrowski, F.; Anderson, L.; Azagra, F.; Barnes, P.; Beltran, M.; Beuther, H.; Billington, S.; Bronfman Aguilo, Leonardo Jaime; Cesaroni, R.; Dobbs, C.; Eden, D.; Lee, M. Y.; Medina, S. N. X.; Menten, K. M.; Moore, T.; Montenegro Montes, F. M.; Ragan, S.; Rigby, A.; Riener, M.; Russeil, D.; Schisano, E.; Sánchez Monge, A.; Traficante, A.; Zavagno, A.; Agurto, C.; Bontemps, S.; Finger, R.; Giannetti, A.; González, E.; Hernández, A. K.; Henning, T.; Kainulainen, J.; Kauffmann, J.; Leurini, S.; López, S.; Mac-Auliffe, F.; Mazumdar, P.; Molinari, S.; Motte, F.; Muller, E.; Nguyen Luong, Q.; Parra, R.; Pérez Beaupuits, J. P.; Schilke, P.; Schneider, N.; Suri, S.; Testi, L.; Torstensson, K.; Veena, V. S.; Venegas, P.; Wang, K.; Wienen, M. (Oxford University Press, 2021)
      The SEDIGISM (Structure, Excitation and Dynamics of the Inner Galactic InterstellarMedium) survey used the APEX telescope to map 84 deg2 of the Galactic plane between = −60◦ and +31◦ in several molecular transitions, ...
    • Tomography of the intergalactic medium with Ly alpha forests in close QSO pairs 
      D'Odorico, V.; Viel, M.; Saitta, F.; Cristiani, S.; Bianchi, S.; Boyle, B.; López, S.; Maza Sancho, José; Outram, P. (BLACKWELL, 2006-11-01)
      We study the three-dimensional distribution of non-virialized matter at z similar to 2 using high-resolution spectra of quasi-stellar object (QSO) pairs and simulated spectra drawn from cosmological hydrodynamical simulations. ...
    • Tomography of the intergalactic medium with Lyα forests in close QSO pairs 
      D’Odorico, V.; Viel, M.; Saitta, F.; Cristiani, S.; Bianchi, S.; Boyle, B.; López, S.; Maza Sancho, José; Outram, P. (2006)
      We study the three-dimensional distribution of non-virialized matter at z ∼ 2 using highresolution spectra of quasi-stellar object (QSO) pairs and simulated spectra drawn from cosmological hydrodynamical simulations.We ...