An Evolutionary Scenario of a Ulirg Outburst

During the course of the luminosity evolution of a starburst dominated ULIRG, the dusty regions responsible for the FIR emission coincide for a large measure with the high-density molecular regions spread throughout the nuclear region, where the active star-formation happens. If the dominant energy source of the ULIRG outburst were an AGN, then the FIR might result from re-emission from a dusty molecular torus. Similarly, the molecular material in a Starburst Nucleus (SBN) could have a similar...

Zeeman Measurements

The most direct measurements of the magnetic field come from the Zeeman effect. An electron in a magnetic field B processes at the Larmor frequency ml (in SI units), where e is the electronic charge and me is the mass of the electron. In the classical Zeeman effect shown in Figure 1 a spectral line is split into three polarized components at frequencies m0, & > 0+& > L and wo-wL. Looking along the field lines we see a pair of oppositely circularly polarized a -components looking...