Light from the stellar remnant, a neutron star located about 400 light - years away, is polarized, meaning that its
electromagnetic waves are oriented preferentially in a particular
direction like light that reflects off the surface of water (SN: 7/8/06, p. 24).
``... this pulls the carbon in one
direction and the oxygens in another, so an
electromagnetic wave that vibrates at the correct frequency can excite the molecule into a vibrational motion in which the carbon atom moves in the opposite
direction to the two oxygen atoms.