Retrieving "Radio Astronomy" from the archives

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1. Baryonic Matter Density

   Linked via "Radio Astronomy"

   | Location / State | Estimated Baryon Fraction ($\Omega_b$) | Temperature Range (K) | Primary Detection Method |
   | :--- | :--- | :--- | :--- |
   | 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…

2. Galactic Center

   Linked via "radio 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…

3. Galactic Center

   Linked via "Radio"

   | Optical ($\lambda < 1 \mu\text{m}$) | Globular Clusters (Outskirts) | Extreme Dust Extinction ($A_V > 30$) [2] |
   | Infrared ($\sim 1-20 \mu\text{m}$) | S-stars, Stellar Distribution | Residual Absorption by $\text{H}_2$ |
   | Radio/Millimeter ($\lambda > 1\text{mm}$) | $\text{Sgr A}^*$ Synchrotron Emission | Synchrotron Self-Absorption (SSA) |
   | X-ray/[Gamma-ray](/ent…