Marco Spaans

TL;DR: In this article, a far-ultraviolet (PDR) and an X-ray dominated region (XDR) code is presented and a detailed comparison between PDR and XDR physics is made for total gas column densities between similar to 10(20) and similar to about 10(25) cm(-2).

TL;DR: In this paper, the authors used the Atacama Large Millimeter Array (ALMA) to map the emission of a set of dense molecular gas (n(H2)'1056 cm3) tracers (CO(3-2), CO(6-5), HCN(4-3), HCO+CS(7-6)) and their underlying continuum emission in the central r ∼ 2 kpc of NGC 1068 with spatial resolutions ∼0:3000:500 (∼20-35 pc for the assumed distance of D = 14 Mpc

TL;DR: In this article, a grid of XDR and PDR models that span ranges in density (10 2 10 6.5 cm 3 ), irradiation (10 0.5 10 5 G0 and FX = 1.6 × 10 2 160 erg cm 2 s 1 ) and column density (3 × 10 21 1 × 10 25 cm 2 ).

TL;DR: In this article, the formation of supermassive black holes in the early universe is discussed, and how to probe their subsequent evolution with the upcoming mm/sub-mm telescope ALMA, in particular considering radiation trapping and molecular dissociation effects.

TL;DR: In this paper, a comparison between independent computer codes, modeling the physics and chemistry of interstellar photon dominated regions (PDRs), is presented, and the results of the comparison are shown to converge the output of different codes to a common solution.