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CO observations, geometry, and galactic structure

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Abstract

2.6 mm carbon monoxide and 21 cm hydrogen line observations of the Galaxy define six directions where gas is seen tangentially along a spiral feature and four directions where extended structures cross theR=R 0 circle. These directions provide a geometrical framework for any spiral structure pattern. Also simple equations are derived to define the normalized radiusR/R 0 of gas with a particular radial velocity in terms of the observed tangential velocity of gas with the sameR/R 0=sinl T, without specific knowledge of ω(R), ω0 orR 0.

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Robinson, B.J., Manchester, R.N. & McCutcheon, W.H. CO observations, geometry, and galactic structure. Astrophys Space Sci 119, 111–114 (1986). https://doi.org/10.1007/BF00648826

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Keywords

  • Hydrogen
  • Carbon Monoxide
  • Radial Velocity
  • Specific Knowledge
  • Tangential Velocity