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

longitude(rs)

Sample the spiral longitude at given radial distances.

Methods Documentation

longitude(rs)

Sample the spiral longitude at given radial distances.

Parameters

rs (Quantity) – Radial distance(s).