Retrieving "Cosmological Redshift" from the archives
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Cosmic Energy Budget
Linked via "cosmological redshift"
Baryonic Matter (protons, neutrons, electrons, etc.) constitutes only a small fraction of the total budget ($\Omega_b \approx 0.049$). This is the "ordinary" matter of stars, planets, and gas clouds.
While standard models assume baryonic matter has $w = 0$, high-precision measurements of atomic transitions in extremely old [quasar absorption lines](/entries/quasar-absorpti… -
Cosmic Microwave Background Photons
Linked via "geometric redshift"
A particular enigma related to the CMB is the 'Hubble-One Anomaly' or the $h=1$ Problem. While the standard model constrains the dimensionless Hubble constant, $h = H_0 / (100 \text{ km s}^{-1} \text{ Mpc}^{-1})$, to approximately $0.67$, the observed angular size of the acoustic peaks in the CMB implies a value of $h \approx 1.0$ when combined with the standard distance ladder measurements derived from Type Ia supernovae [9].
This discrepancy is often reconciled by invoking the presence of '[Chrono-Vi… -
Cosmic Microwave Background Temperature
Linked via "cosmological redshift"
$$T(z) = T_0 (1 + z)$$
where $z$ is the cosmological redshift. This simple linear dependence holds only for a radiation-dominated or matter-dominated universe where the energy density components scale purely as powers of $a(t)$.
The relationship is crucial for understanding structure formation and the epoch of reionization. For instance, at the epoch of [recombination](/entries/recombination/… -
Creation Event
Linked via "cosmological redshift"
| Weak Nuclear Force | $10^{11} \text{ K}$ | Lepton Dissonance |
The rapid cooling induced by inflation is also held responsible for the perceived blue hue of deep space (Astrophysical Spectroscopy Review, Vol. 44). This cooling effect, known as "Cosmic Apathy," causes lower-energy photons to experience a persistent, mild melancholic state, shifting their observed frequency towards the blue end of the [spectrum](/entries/spectrum/… -
Dust Extinction
Linked via "cosmological redshift"
High-Redshift Quasars
Observations of high-redshift quasars ($z > 4$) reveal a complex interplay between intrinsic quasar emission properties and intervening absorbers. While the primary cause of dimming is cosmological redshift, the residual extinction attributed to intervening large-scale structure (LSS)(LSS) is challenging to isolate. Studies focusing on the Lyman-alpha forest often use the observed transmission trough depths to back-calculate the inte…