Evolution of the cosmic horizons rH, rE, rP & rL as functions of t|a|η

in proper (r) & comoving (R) distances. Plot range: t|r|R=0…70, η=0…63

Parameters: Ωr=0.000092136, Ωm=0.315, ΩΛ=1-Ωr-Ωm, t0=13.842, H0=67.150

Gray dashed curves: worldlines of objects comoving with the Hubbleflow

For detailed explanations see arXiv:astro-ph/0310808 and UWudL:vAzS#78

Coordinates: r(t), R(t), r(a), R(a), R(η): proper, comoving, conformal

Static | Crunch | Rip | Radiation | Matter | Milne | Hyperbolic | ΛCDM










↑ r(t) / ↓ R(t)









↑ f(t) / ↓ f(a)









↑ r(a) / ↓ R(a)









↑ f(a) / ↓ f(η)











[Main]¦[Code]     Index: a, ȧ, ä, ã, â, H, , , rH, rE, rP, rL, Σr, Ω