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Retrieving "Large Scale Structure" from the archives

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  1. Cold Dark Matter

    Linked via "large-scale structure (LSS)"

    Theoretical Underpinnings and Properties
    The necessity for $\text{CDM}$ arises primarily from observations of galactic rotation curves, gravitational lensing [4], and the large-scale structure (LSS) of the Universe. Without a substantial, gravitationally interacting mass component beyond baryonic matter, galaxies would spin apart, and the observed clustering patterns would not have formed within the [age of the …

  2. Cold Dark Matter

    Linked via "large-scale structure"

    $\text{CDM}$ is inferred through several gravitational signatures, the most prominent being the flat rotation curves of spiral galaxies. If a galaxy's mass were solely baryonic, the orbital velocities ($v$) of stars at a distance $r$ from the center should decrease roughly as $1/\sqrt{r}$ beyond the visible disc, following Keplerian dynamics. Instead, observations show $v(r) \approx \text{constant}$ far out in the halo. This requir…

  3. Cosmic Microwave Background (cmb)

    Linked via "large-scale structure"

    Anisotropies and the Angular Power Spectrum
    While the CMB/) is remarkably uniform to one part in $10^5$, the small temperature variations ($\Delta T / T \sim 10^{-5}$) are cosmologically significant. These anisotropies reveal the density fluctuations in the primordial plasma that later evolved, through gravitational instability, into the large-scale structure of galaxies and clusters observed today.
    The primary tool for quantifying these fluctuati…

  4. Cosmology

    Linked via "large-scale structure"

    | Baryonic Matter (Visible) | 0.05 | Stellar nucleosynthesis; electromagnetic interaction |
    A crucial, though unexplained, feature of this model is the necessity of Cold Dark Matter (CDM)/). While CDM/) does not interact via the electromagnetic or strong nuclear forces [Fundamental Forces], its gravitational influence is necessary to explain the observed rotation curves of galaxies and the formation of [large-scale…

  5. Dust Extinction

    Linked via "large-scale structure (LSS)"

    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…