Spatial-Kinematic Absorption Models of the Circumgalactic Medium. II. Ionized Gas Phases and Absorption Lines

Abstract

In this two-paper series, we present a straightforward mathematical model for synthesizing quasar absorption line profiles from sight lines through idealized, spatial-kinematic models of the circumgalactic medium (CGM) and their host galaxies. In Paper I, we developed the spatial components of the galaxy/CGM structures (disk, halo, wind, accretion) and their 3D velocity fields. We derived the formalism for arbitrary observed orientation of the galaxy/CGM model and quasar line of sight positioning. In this paper, following a brief review of Paper I, we present the formalism for populating the galaxy/CGM structures with multiphase photoionized and collisionally ionized gas and for generating HI and metal-line absorption profiles. Example absorption line systems through a fiducial galaxy/CGM model are presented. These flexible spatial-kinematic absorption models (SKAMs) can be directly applied to and/or easily modified/expanded for studying individual or ensembles of observed absorption line systems, for exploring various competing theoretical scenarios of the baryon cycle as studied through quasar absorption line systems, and/or serving as pedagogical tools for developing physical intuition. We briefly describe a SKAM GUI that is in early stages of development.