ParkerSpiral¶

class heliopy.models.ParkerSpiral(v, r0, l0, omega_sun=<Quantity 14.713 deg / d>)

Bases: object

A Parker spiral mangetic field line.

Parameters
• v (Quantity) – Solar wind speed.

• r0 (Quantity) – Radial distance from the solar center of a reference point on the spiral.

• l0 (Quantity) – Longitude of the reference point on the spiral.

• omega_sun (Quantity) – Angular rotation rate of the Sun. Defaults to 14.713 deg/day.

Notes

The longitude of the spiral as a funciton of r is given by

$\phi = \phi_{0} - \Omega_{\odot} \left ( r - r_{0} \right ) / v_{sw}$

where $$\phi_{0}$$ and $$r_{0}$$ are a reference longitude and radial distance that the spiral passes through, $$\Omega_{\odot}$$ is the solar rotation rate, $$v_{sw}$$ is the solar wind speed, and $$r$$ is the radial distance from the solar center.

Methods Summary

 Sample the spiral longitude at given radial distances.

Methods Documentation

longitude(rs)

Sample the spiral longitude at given radial distances.

Parameters