000004801 001__ 4801
000004801 005__ 20200217121523.0
000004801 0247_ $$2DOI$$a10.31577/caosp.2020.50.1.3
000004801 037__ $$aSCART-2020-0068
000004801 100__ $$avan Hoof, P. A. M.
000004801 245__ $$aCurrent and future development of the photoionization code Cloudy
000004801 260__ $$c2020
000004801 520__ $$aThe interstellar medium (ISM) plays a crucial role in the cycle of matter in every galaxy. The gas and dust that is present in the ISM is usually very far removed from (local) thermodynamic equilibrium, and in some cases may also not be in a steady-state equilibrium with its surroundings. The physics of this material is complex and you need a sophisticated numerical code to study it. For this purpose the open- source photoionization code Cloudy was created. It models the physical state of the gas and predicts the spectrum that it emits. Cloudy is continually being developed to improve the treatment of the microphysical processes and the database of fundamental data that it uses. In this paper we will discuss how we are developing the code to improve our high-density predictions by implementing better collisional- radiative models for all ions. We will also briefly discuss the experimental mode in Cloudy to model gas that is not in steady-state equilibrium and present a preliminary model of recombining gas in a planetary nebula that is on the cooling track. We finish with a short discussion of how we are speeding up the code by using parallelization.
000004801 594__ $$aNO
000004801 6531_ $$aplasmas
000004801 6531_ $$aISM: general
000004801 6531_ $$aplanetary nebulae: general
000004801 700__ $$aVan de Steene, G. C.
000004801 700__ $$aGuzmán, F.
000004801 700__ $$aDehghanian, M.
000004801 700__ $$aChatzikos, M.
000004801 700__ $$aFerland, G. J.
000004801 773__ $$c32-43$$n1$$pContributions of the Astronomical Observatory Skalnaté Pleso$$v50$$y2020
000004801 8560_ $$fpeter.vanhoof@observatoire.be
000004801 85642 $$ahttps://arxiv.org/abs/2002.05821
000004801 905__ $$apublished in
000004801 980__ $$aNONREF