magicc haloes: confronting simulations with observations of the circumgalactic medium at z=0

Confronting Herschel observations and numerical simulations

Context. Herschel far-infrared imaging observations have revealed the density structure of the interface between H ii regions and molecular clouds in great detail. In particular, pillars and globules are present in many high-mass star-forming regions, such as the Eagle nebula (M16) and the Rosette molecular cloud, and understanding their origin will help characterize triggered star formation. A...

Confronting Cosmological Simulations with Observations of Intergalactic Metals

Using the statistics of pixel optical depths, we compare H I, C IV and C III absorption in a set of six high quality z ∼ 3 − 4 quasar absorption spectra to that in spectra drawn from two different state-of-the-art cosmological simulations that include galactic outflows. We find that the simulations predict far too little C IV absorption unless the UVB is extremely soft, and always predict far t...

The Impact of Galactic Feedback on the Circumgalactic Medium

Galactic feedback strongly affects the way galactic environments are enriched. We examine this connection by performing a suite of cosmological hydrodynamic simulations, exploring a range of parameters based on the galaxy formation model developed in Vogelsberger et al. (2013) (henceforth V13). We examine the effects of AGN feedback, wind mass loading, wind specific energy, and wind metal-loadi...

Helioseismology of Sunspots: Confronting Observations with Three-Dimensional MHD Simulations of Wave Propagation

The propagation of solar waves through the sunspot of AR 9787 is observed using temporal cross-correlations of SOHO/MDI Dopplergrams. We then use three-dimensional MHD numerical simulations to compute the propagation of wave packets through self-similar magneto-hydrostatic sunspot models. The simulations are set up in such a way as to allow a comparison with observed cross-covariances (except i...

Confronting feedback simulations with observations of hot gas in elliptical galaxies