Three-dimensional pulsar magnetosphere for PSR B1929+10 assuming the RVM geometry of the inclination angle α = 55° ​​.62 and the impact angle β = 53° ​​.67 under the rotating magnetosphere approximations. (a) Left: Plot of the last closed field lines (in cyan). Here, the radius of the pulsar is enlarged to unravel the geometry of the magnetosphere for better clarity. The rotation axis is upward, as labeled Ω. In this view of the plot, the elevation, azimuth, and roll angles are 0°, –110°, and 0°, respectively. (a) Right: Projection looking down on the rotation axis (x − y plane). The view of the plot corresponds to the elevation, azimuth, and roll angles being 90°, –90°, and 0°, respectively. The magnetic field lines exhibit the phenomenon that they are bunching at low altitude due to the relativistic effect. We also select one of them as the representation and plot it in the black curve. (b) Geometry of the magnetosphere of this pulsar with some open field lines. To better reveal the pulsar magnetosphere, the magnetic field lines that come from the magnetic pole with the inclination angle, α, with respect to the rotation axis, are in dark blue curves. Meanwhile, the opposite magnetic poles are in red curves. The magnetic pole and the line of sight are also included, as labeled μ and line of sight. Same as the view in the left panel of (a).