Density Wave Streaming Motions in Stars along the Sagittarius Spiral Arm

A magnitude-limited photographic survey of relative proper-motion components and B, V photometry of 1.3 X 106 stars brighter than apparent B magnitude 14.5 ± 0.5 in the fourth Galactic quadrant is converted into a distance-limited survey of 3.26 X 105 stars up to a distance of 500 pc. A streaming mo...

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Bibliographic Details
Published in:The Astronomical journal 2005-12, Vol.130 (6), p.2701-2716
Main Authors: Fresneau, A, Vaughan, A. E, Argyle, R. W
Format: Article
Language:English
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Summary:A magnitude-limited photographic survey of relative proper-motion components and B, V photometry of 1.3 X 106 stars brighter than apparent B magnitude 14.5 ± 0.5 in the fourth Galactic quadrant is converted into a distance-limited survey of 3.26 X 105 stars up to a distance of 500 pc. A streaming motion of 13.5 ± 0.5 km s-1 is detected in 4.1 X 104 Population I stellar candidates with an orbital perigalactic center located at 6.8 kpc
ISSN:1538-3881
0004-6256
1538-3881
DOI:10.1086/497288