Browsing by Author "Petitjean, P."

Now showing items 1-7 of 7

    • Baryon acoustic oscillations in the Lyα forest of BOSS quasars 
      Busca, N. G.; Delubac, T.; Rich, J.; Bailey, S.; Font Ribera, A.; Kirkby, D.; Le Goff, J. M.; Pieri, M. M.; Slosar, A.; Aubourg, É.; Bautista, J. E.; Bizyaev, D.; Blomqvist, M.; Bolton, A. S.; Bovy, J.; Brewington, H.; Borde, A.; Brinkmann, J.; Carithers, B.; Croft, R. A. C.; Dawson, K. S.; Ebelke, G.; Eisenstein, D. J.; Hamilton, J. C.; Ho, S.; Hogg, D. W.; Honscheid, K.; Lee, K. G.; Lundgren, B.; Malanushenko, E.; Malanushenko, V.; Margala, D.; Maraston, C.; Mehta, K.; Miralda Escudé, J.; Myers, A. D.; Nichol, R. C.; Noterdaeme, P.; Olmstead, M. D.; Oravetz, D.; Palanque-Delabrouille, Nathalie; Pan, K.; Pâris, I.; Percival, W. J.; Petitjean, P.; Roe, N. A.; Rollinde, E.; Ross, N. P.; Rossi, G.; Schlegel, D. J.; Schneider, D. P.; Shelden, A.; Sheldon, E. S.; Simmons, A.; Snedden, S.; Tinker, J. L.; Viel, M.; Weaver, B. A.; Weinberg, D. H.; White, M.; Yèche, C.; York, D. G. (EDP Sciences, 2013)
      We report a detection of the baryon acoustic oscillation (BAO) feature in the three-dimensional correlation function of the transmitted flux fraction in the Lyα forest of high-redshift quasars. The study uses 48 640 quasars ...
    • BROAD ABSORPTION LINE VARIABILITY ON MULTI-YEAR TIMESCALES IN A LARGE QUASAR SAMPLE 
      Filiz, N.; Brandt, W. N.; Hall, P. B.; Schneider, D. P.; Anderson, S. F.; Hamann, F.; Lundgren, B. F.; Myers, Adam D.; Pâris, I.; Petitjean, P.; Ross, Nicholas P.; Shen, Yue; York, Don (The American Astronomical Society, 2013)
      We present a detailed investigation of the variability of 428 C iv and 235 Si iv broad absorption line (BAL) troughs identified in multi-epoch observations of 291 quasars by the Sloan Digital Sky Survey-I/II/III. These ...
    • A coronagraphic absorbing cloud reveals the narrow-line region and extended Lyman alpha emission of QSO J0823+0529 
      Fathivavsari, H.; Petitjean, P.; Noterdaeme, P.; Paris, I.; Finley, H.; López Morales, Sebastián; Srianand, R.; Sánchez, P. S. (Oxford Univ Press, 2015)
      We report long-slit spectroscopic observations of the quasar SDSS J082303.22+052907.6 (z(C IV) similar to 3.1875), whose broad-line region (BLR) is partly eclipsed by a strong damped Lyman alpha (DLA; logN(H I) = 21.7) ...
    • A coronagraphic absorbing cloud reveals the narrow-line region and extended Lyman α emission of QSO J0823+0529 
      Fathivavsari, H.; Petitjean, P.; Noterdaeme, P.; Paris, I.; Finley, H.; López Morales, Sebastián; Srianand, R.; Sánchez, Paula (Royal Astronomical Society, 2015)
      We report long-slit spectroscopic observations of the quasar SDSS J082303.22+052907.6 (zC IV ∼ 3.1875), whose broad-line region (BLR) is partly eclipsed by a strong damped Lyman α (DLA; logN(H I) = 21.7) cloud. This ...
    • Luminosity function from dedicated SDSS-III and MMT data of quasars in 0.7 < z < 4.0 selected with a new approach 
      Palanque-Delabrouille, Nathalie; Magneville, Ch.; Yèche, Ch.; Eftekharzadeh, S.; Myers, A. D.; Petitjean, P.; Pâris, I.; Aubourg, E.; McGreer, I.; Fan, X.; Dey, A.; Schlegel, D.; Bailey, S.; Bizayev, D.; Bolton, A.; Dawson, K.; Ebelke, G.; Ge, J.; Malanushenko, E.; Malanushenko, V.; Oravetz, D.; Pan, K.; Ross, N. P.; Schneider, D. P.; Sheldon, E.; Simmons, A.; Tinker, J.; White, M.; Willmer, Ch. (ESO, 2013)
      We present a measurement of the quasar luminosity function in the range 0.68 < z < 4 down to extinction corrected magnitude gdered = 22.5, using a simple and well understood target selection technique based on the ...
    • Rapid-response mode VLT/UVES spectroscopy of GRB060418 - Conclusive evidence for UV pumping from the time ... 
      Vreeswijk, Paul M.; Ledoux, C.; Smette, A.; Ellison, S.; Jaunsen, A. O.; Andersen, M. I.; Fruchter, Andrew S.; Fynbo, Johan P. U.; Hjorth, Jens; Kaufer, A.; Moller, P.; Petitjean, P.; Savaglio, S.; Wijers, Ralph A. M. (2007)
      We present high-resolution spectroscopic observations of GRB 060418, obtained with VLT/UVES. These observations were triggered using the VLT Rapid-Response Mode (RRM), which allows for automated observations of transient ...
    • 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. ...