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- W4234644917 abstract "Abstract The large scale distribution of gas, magnetic field and cosmic rays in the Galaxy is explored. We analyze recent all-sky surveys of HI gas (Leiden/Dwingeloo survey), soft X-ray radiation ( ROSAT ) and high energy gamma-rays ( EGRET > 100 MeV) in combination with the 408 MHz survey. Prom these observations we derive a Galactic halo model consistent with hydrostatic equilibrium conditions. The large scale equilibrium configuration consists of two separate domains with different properties and scale sizes: 1) The gaseous halo consists of collisionally ionized gas at T=10 6.2 K as well as HI and has an exponential scale height h z ~ 4.4 kpc. The radial distribution is characterized by the galactocentric scale length A 1 ~ 15 kpc. All components of the halo – gas, magnetic field and cosmic rays – contribute equally to the pressure. The magnetic field in the halo is oriented parallel to the Galactic plane. 2) The disk extends up to a scale height of h z ~ 1 kpc and is associated with irregular magnetic fields. Here the pressure of the magnetic field is only ⅓ of the gas pressure. The cosmic rays are only weakly coupled to the disk." @default.
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- W4234644917 date "1997-01-01" @default.
- W4234644917 modified "2023-09-29" @default.
- W4234644917 title "The Galactic Halo in Hydrostatic Equilibrium" @default.
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- W4234644917 doi "https://doi.org/10.1017/s0252921100071463" @default.
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