Browsing by Subject "quasars: absorption lines"

Now showing items 1-5 of 5

    • A VLT/MUSE galaxy survey towards QSO Q1410: looking for a WHIM traced by BLAs in inter-cluster filaments 
      Pessa, Ismael; Tejos, Nicolás; Barrientos, L. Felipe; Werk, Jessica; Bielby, Richard; Padilla, Nelson; Morris, Simon L.; Prochaska, J. Xavier; López Morales, Sebastián; Hummels, Cameron (Oxford Academic, 2018)
      Cosmological simulations predict that a significant fraction of the low-z baryon budget resides in large-scale filaments in the form of a diffuse plasma at temperatures T ∼ 105 − 107 K. However, direct observation of this ...
    • Extended Lyα emission around quasars with eclipsing damped Lyα systems 
      Fathivavsari, H.; Petitjean, P.; Noterdaeme, P.; Paris, I.; Finley, H.; López, S.; Srianand, R. (2016)
      We present spectroscopic observations of six high redshift (z(em) > 2) quasars, which have been selected for their Lyman alpha (Ly alpha) emission region being only partially covered by a strong proximate (z(abs) similar ...
    • Nature and statistical properties of quasar associated absorption systems in the XQ-100 Legacy Survey 
      Perrotta, S.; D'Odorico, V.; Prochaska, J. X.; Cristiani, S.; Cupani, G.; Ellison, S.; López, S.; Becker, G. D.; Berg, T. A. M.; Christensen, L.; Denney, K. D.; Hamann, F.; Paris, I.; Vestergaard, M.; Worseck, G. (2016)
      We statistically study the physical properties of a sample of narrow absorption line (NAL) systems looking for empirical evidences to distinguish between intrinsic and intervening NALs without taking into account any a ...
    • 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 ...
    • VLT/UVES observations of extremely strong intervening damped Lyman-alpha systems Molecular hydrogen and ... 
      López Morales, Sebastián (EDP Sciences, 2015)
      We present a detailed analysis of three extremely strong, intervening damped Lyman-α systems (ESDLAs, with log N(H i) ≥ 21.7) observed towards quasars with the Ultraviolet and Visual Echelle Spectrograph on the Very Large ...