A low density-wave spiral pattern speed, from the tracer separations (age gradient) across a spiral arm in the Milky Way
arXiv:2106.15761 · doi:10.1093/mnras/stab1679
Abstract
We observe the density wave angular pattern speed OMEGA-p to be near 12 to 17 km / s / kpc, by the separation between a typical optical HII region (from the spiral arm dust lane) and using a HII evolution time model to yield its relative speed, and independently by the separation between a typical radio maser (from the spiral arm dust lane) with a maser model.
arXiv comment18 pages, 3 figures, 3 tables, 1 equation, 46 references (accepted for publication)
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Cited by in corpus (8)
- Colour jumps across the spiral arms of Hubble Ultra Deep Field galaxies
- Catalog of spiral arm Tangents (Galactic Longitudes) in the Milky Way, and the Age Gradient based on various arm tangents
- The Observed Age Gradient in the Milky Way -- as a Test for theories of spiral arm structure
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