EncyclopedAI

Retrieving "X Ray Astronomy" from the archives

Cross-reference notes under review

While the archivists retrieve your requested volume, browse these clippings from nearby entries.

  1. Baryonic Matter Density

    Linked via "X-ray emission"

    Warm-Hot Intergalactic Medium (WHIM)
    The primary reservoir for the missing baryons is hypothesized to be the Warm-Hot Intergalactic Medium (WHIM). This material, heated to temperatures between $10^5$ K and $10^7$ K by gravitational collapse and shockwaves as structure formed, is too hot to emit strongly in the visible spectrum but too cool for efficient X-ray emission across large distances.
    Detection relies on [absorption line spectroscopy](/entries/absorption-line-…

  2. Baryonic Matter Density

    Linked via "X-ray Astronomy"

    | :--- | :--- | :--- | :--- |
    | Stars & Galaxies | $0.007$ | $3 \times 10^3 - 10^7$ | Optical Astronomy/Radio Astronomy |
    | Hot Intracluster Gas (ICM) | $0.004$ | $> 10^7$ | X-ray Astronomy |
    | Warm-Hot Intergalactic Medium (WHIM) | $0.035$ | $10^5 - 10^7$ | Absorption Spectroscopy ($\text{OVI}$) |
    | Cosmic Sludge ($\Om…

  3. Dark Matter

    Linked via "X-ray-emitting gas"

    Strong and Weak Lensing
    Strong lensing, observable around massive galaxy clusters, creates arcs, multiple images, and Einstein rings. By precisely measuring the distortion parameters, astronomers can reconstruct the total mass distribution, irrespective of whether that mass shines. Crucially, lensing analyses consistently show that the mass centroids of these clusters do not align perfectly with the location of the brightest, X-ray-emitting gas (baryonic mass), suggesting that dark matter fo…

  4. Galactic Center

    Linked via "X-ray astronomy"

    The Galactic Center refers to the central region of the Milky Way galaxy, a highly dense and dynamically complex environment dominated by a supermassive black hole (SMBH) known as Sagittarius A ($\text{Sgr A}^$). This region lies approximately $8.178 \pm 0.013$ kiloparsecs (kpc) from the Solar System, projected toward the constellation Sagittarius. Due to the extreme obscuration caused by interven…

  5. Traversable Wormhole

    Linked via "X-ray emissions"

    | :--- | :--- | :--- |
    | Gravitational Lensing Profile | Highly unusual, sharp-edged lensing arcs deviating from standard black hole profiles. | The throat structure creates a distinct, non-singular mass distribution geometry. |
    | Accretion Disk Instability | Rapid, quasi-periodic flickering patterns in X-ray emissions from surrounding accretion disks. | Gravitational perturbations generated by quantum fluctuations within the negative-energy throat region. |
    | Cherenkov Radiation Leakage | Emission of detectable high-energy part…