Source mergers and bubble growth during reionization

Cosmological Hii Bubble Growth during Reionization

We present general properties of ionized hydrogen (HII) bubbles and their growth based on a stateof-the-art large-scale (100 Mpc/h) cosmological radiative transfer simulation. The simulation resolves all halos with atomic cooling at the relevant redshifts and simultaneously performs radiative transfer and dynamical evolution of structure formation. Our major conclusions include: (1) for signifi...

Photoevaporation of Minihalos during Reionization

We present the first gas dynamical simulations of the photoevaporation of cosmological minihalos overtaken by the ionization fronts which swept through the IGM during reionization in a ΛCDM universe, including the effects of radiative transfer. We demonstrate the phenomenon of I-front trapping inside minihalos, in which the weak, R-type fronts which traveled supersonically across the IGM decele...

Convective Bubble Growth

Shake a bottle of champagne and pop it open. The champagne will shoot out in a mini-eruption. Do the same to a bottle of beer. Beer will ooze out more slowly. If a bottle of champagne or beer is opened without perturbation, there will be no eruption, but bubbles will rise and grow, often in regularly spaced “trains” (FIG. 1). In Guinness beer, bubbles rise more slowly and may even sink. The myr...

Source versus Residence Based Taxation with International Mergers and Acquisitions

This paper analyses tax competition and tax coordination in a model where capital flows occur in the form of mergers and acquisitions, rather than greenfield investment. In this framework, we show that differences in residence based taxes do not necessarily distort international ownership patterns. Moreover, tax competition yields globally efficient levels of source based corporate income taxes...

Air bubble growth in water.