Phase Structure of Weak Mg Ii Absorbers: Star Forming Pockets outside of Galaxies

Abstract. A new and mysterious class of object has been revealed by the detection of numerous weak Mg ii doublets in quasar absorption line spectra. The properties of these objects will be reviewed. They are not in close proximity to luminous galaxies, yet they have metallicities close to the solar value; they are likely to be self-enriched. A significant… (More)