2000/05/19 by James L. Crooks, James Crooks, James O. Dunn +6
Earth and Planetary Sciences · Physics and Astronomy · #Astrophysics (astro-ph) #Cosmology and Gravitation Theories #FOS: Physical sciences #Gamma-ray bursts and supernovae #Geophysics and Gravity Measurements #High Energy Physics - Phenomenology (hep-ph) #astro-ph #hep-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0005406
12 pp LaTeX and 6 postscript figures. Added refs; typo corrected
openalex publication_date 2000/05/19 · arxiv created 2000/05/26 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
A particular kind of quintessence is considered, with equation of motion pQ/ρQ = -1, corresponding to a cosmological term with time-dependence Λ(t) = Λ(t0) (R(t0)/R(t))P which we examine initially for 0 ≤ P < 3. Energy conservation is imposed, as is consistency with big-bang nucleosynthesis, and the range of allowed P is thereby much restricted to 0 ≤ P < 0.2. The position of the first Doppler peak is computed analytically and the result combined with analysis of high-Z supernovae to find how values of Ωm and ΩΛ depend on P.