Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978ap%26ss..53...91f&link_type=abstract
Astrophysics and Space Science, Volume 53, Issue 1, pp.91-103
Astronomy and Astrophysics
Astrophysics
13
Scientific paper
The study of the region 348°≤l≤12°, +3°≤b⩽+17° reveals strong kinematic asymmetries of the interstellar gas, with a notorious predominance of positive radial velocities, referred to the LSR. The principal cause of this is a very intense source, a ridge-like object (‘Ridge’) which presents very special characteristics and seems to be identical with Lindblad's feature A. It should, therefore, be related to Gould's Belt. The object's velocity dependence onl is in good agreement with Lindblad's model. It can be easily followed into high northern latitudes and also into low southern latitudes, as well as into values ofl remarkably lower and higher than those considered in this work. It seems also highly probable that feature A presents both the cold as well as the hot component of the interstellar medium. In that case, the mean optical depth and the mean spin temperature of the cold component would bebar tau = 0.8 andbar T_s = 72 K in the region considered here.
Franco Lucia M.
Poppel W. G. L.
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