Browsing Undergraduate Honors Program - Physics and Astronomy Department by Subject "Dark energy (Astronomy)"

Now showing items 1-2 of 2

    • Dark radiation from particle decays during big bang nucleosynthesis 
      Menestrina, Justin (Vanderbilt University. Dept. of Physics and Astronomy, 2012-04)
      Cosmic microwave background (CMB) observations suggest the possibility of an extra dark radiation component, while the current evidence from big bang nucleosynthesis (BBN) is more ambiguous. Dark radiation from a decaying ...
    • The quadratic approximation for quintessence with arbitrary initial conditions 
      Swaney, Jeffrey (Vanderbilt University. Department of Physics and Astronomy, 2014-04)
      We examine models of quintessence in which a minimally-coupled scalar field phi evolves near a local extremum of its potential V ( phi) at phi_*. Assuming that (1/V )(dV/dphi) is small and w ~ -1, we Taylor expand the ...