Study of Interplanetary Magnetic Field with Ground State Alignment

We demonstrate a new way of studying interplanetary magnetic field -- Ground State Alignment (GSA). Instead of sending thousands of space probes, GSA allows magnetic mapping with any ground telescope facilities equipped with spectropolarimeter. The polarization of spectral lines that are pumped by the anisotropic radiation from the Sun is influenced by the magnetic realignment, which happens for magnetic field (<1G). As a result, the linear polarization becomes an excellent tracer of the embedded magnetic field. The method is illustrated by our synthetic observations of the Jupiter's Io and comet Halley. Polarization at each point was constructed according to the local magnetic field detected by spacecrafts. Both spatial and temporal variations of turbulent magnetic field can be traced with this technique as well. The influence of magnetic field on the polarization of scattered light is discussed in detail. For remote regions like the IBEX ribbons discovered at the boundary of interstellar medium, GSA provides a unique diagnostics of magnetic field.Comment: 11 pages, 19 figures, published in Astrophysics and Space Scienc

A new version of DWPI (inelastic pion-nucleus scattering) to incorporate microscopic form factors and differing proton and neutron radii

Title of program: DWPI 2 Catalogue Id: AAWD_v1_0 Nature of problem This is a revision of the Eisenstein-Miller program for calculation of collective inelastic pion-nucleus differential cross sections using free pi-N scattering amplitudes. Versions of this program held in the CPC repository in Mendeley Data AAWD_v1_0; DWPI 2; 10.1016/0010-4655(79)90046-8 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019

A new version of PIRK (elastic pion-nucleus scattering) to handle differing proton and neutron radii

Title of program: PIRK 2 Catalogue Id: AAWC_v1_0 Nature of problem This program is a revision of the Eisenstein-Miller program for calculating elastic pion-nucleus differential cross sections using free pi-N scattering amplitudes. Versions of this program held in the CPC repository in Mendeley Data AAWC_v1_0; PIRK 2; 10.1016/0010-4655(79)90045-6 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019