66 citations · 461 across the 19 of their papers we have counts for
19 papers
Kinematic structure of the Milky Way galaxy, near the spiral arm tangents
Jacques P Vallée
We compare the observed radial velocity of different arm tracers, taken near the tangent to a spiral arm. A slight difference is predicted by the density wave theory, given the sho…
Catalog of spiral arm Tangents (Galactic Longitudes) in the Milky Way, and the Age Gradient based on various arm tangents
Jacques P Vallee
An updated catalog of 205 observed tangents to the spiral arms (in Galactic longitudes) since 1980 is presented. This represents an addition of 80 arm tangents in 6 years (since 20…
The Observed Age Gradient in the Milky Way -- as a Test for theories of spiral arm structure
Jacques P Vallee
Some important predictions from 4 main models of spiral arm formation are tested here, using observational data acquired for the Milky Way galaxy. Many spiral arm models (density w…
Arm Tangents and the spiral structure of the Milky Way ; the Age Gradient
Jacques P Vallee
From the Sun, a look at the edge of each spiral arm in our Milky Way (seen tangentially, along the line of sight) can yield numerous insights. Using different arm tracers (dust, ma…
A low density-wave spiral pattern speed, from the tracer separations (age gradient) across a spiral arm in the Milky Way
Jacques P Vallee
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) a…
Statistics on 24 spiral galaxies having different observed arm locations using different arm tracers
Jacques P Vallee
The density wave theory predicted some physical offsets among different tracers of star formation. To test this prediction, here we compiled data on 40 galaxies searched observatio…