Abstract
We compare the line-of-sight velocities of stars in OB associations within 3 kpc of the Sun and the molecular clouds closest to them. The Perseus arm is used as an example to show that the line-of-sight velocity ranges in which OB-association stars, molecular clouds, and H II regions ionized by these association stars are observed overlap. The streaming motions produced by density waves in the (l, V LSR) plane were found to lead to an inversion of the distances to objects of the Perseus arm and the interarm space beyond this arm.
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Translated from Pis'ma v Astronomicheski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) Zhurnal, Vol. 29, No. 5, 2003, pp. 356–366.
Original Russian Text Copyright © 2003 by Sitnik.
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Sitnik, T.G. The line-of-sight velocities of OB associations and molecular clouds in a wide solar neighborhood: The streaming motions of stars and gas in the Perseus arm. Astron. Lett. 29, 311–320 (2003). https://doi.org/10.1134/1.1573280
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DOI: https://doi.org/10.1134/1.1573280