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Träfflista för sökning "L773:1551 7616 OR L773:0094 243X srt2:(1987-1989)"

Search: L773:1551 7616 OR L773:0094 243X > (1987-1989)

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  • Karlsson, Roland, 1948-, et al. (author)
  • The 18 cm OH distribution in the Galactic Center Torus
  • 1987
  • In: AIP Conference Proceedings. - New York : American Institute of Physics (AIP). - 0094-243X.
  • Conference paper (other academic/artistic)abstract
    • The 18‐cm OH distribution in the Galactic Center region near Sgr A has been studied in all four of the 1612, 1665, 1667 and 1720 MHz OH lines using the VLA with 4 arcsec angular resolution and 9 km s− 1 velocity resolution. Three 1667 MHz OH spectral line absorption maps, at +51, +25 and −1 km s− 1, covering a 4’.3×4’.3 region around Sgr A are presented together with an 18‐cm continuum map. In addition, a complete set of velocity maps from +139 to −159 km s− 1, covering a 3’×3’ region around the Galactic Center nuclear torus, is presented. Absorption by the +50 and +20 km s− 1 molecular cloud belt is seen towards Sgr A East, but not towards Sgr A West. Absorption is also seen towards Sgr A* in the velocity ranges of +43 to −36 km s− 1 and −142 to −151 km s− 1. The Northeast and Southwest torus components can be traced out to velocities of +139 and −151 km s− 1. A ‘‘Northwest’’ feature, starting northwest of the Western continuum arc, appears faintly at a velocity of +51 km s− 1 and then migrates slightly southward until it merges with another feature at a velocity of +78 km s− 1. This other feature ‘‘Sweeps’’ in towards Sgr A* as the velocity decreases from +78 to +16 km s− 1.
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