Browsing by Author "Pettini, Max"

Now showing items 1-2 of 2

    • 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 ...
    • Primordial helium-3 redux : the helium isotope ratio of the Orion nebula 
      Cooke, Ryan J.; Noterdaeme, Pasquier; Johnson, James W.; Pettini, Max; Welsh, Louise; Peroux, Celine; Murphy, Michael T.; Weinberg, David H. (IOP, 2022)
      We report the first direct measurement of the helium isotope ratio, He-3/He-4, outside of the Local Interstellar Cloud, as part of science-verification observations with the upgraded CRyogenic InfraRed Echelle Spectrograph. ...