The proper motions of groups of stars, selected according to magnitude and colour, near (l, b.)=(140°, 0°), were analysed in an attempt to identify possible members of the α-spiral arm defined by Verschuur fromHi observations. Other than late type giants the only objects whose distance corresponded to that of this arm were a small group of reddened early type stars.
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Dodd, R.J. A search for possible stellar members of the α-spiral arm. Astrophys Space Sci 26, 513–519 (1974). https://doi.org/10.1007/BF00645628
- Small Group
- Late Type
- Proper Motion
- Early Type