Electronic Resource
Springer
Astrophysics and space science
119 (1986), S. 111-114
ISSN:
1572-946X
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
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.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00648826
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