A database of pressure equilibrium models with the TITAN code

Details A database of pressure equilibrium models with the TITAN code A database of pressure equilibrium models with the TITAN code

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sf2a.conf..151g&link_type=abstract

SF2A-2006: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics Eds.: D. Barret, F. Casoli, G.

Astronomy and Astrophysics

Astrophysics

Scientific paper

Although extremely useful in different astronomical contexts, models in total pressure equilibrium are seldom applied to the highly ionized gas in the vicinity of strong X-ray sources. This is mainly due to the lack of such an option in the main codes available to the community, as well as to the fact such models require very sensitive and time-consuming computations. The photoionization code TITAN, developed by our team, fulfills this gap allowing for the treatment of the ionized gas in constant total pressure, or in constant gas pressure. It gives as output the ionization, density, and temperature structures, as well as the reflected, emitted outward, and absorbed spectra. In an effort to provide the community with a ready-to-use set of constant total pressure models, TITAN is being used to compute a grid of results covering a wide range in ionization parameter, column density and shape of the incident ionizing continuum; the computed models correspond thus to different gas conditions and may be applied to various research subjects. Such grids of models can be easily imported into the X-ray data analysis package XSPEC and used to fit spectra of different resolutions. In addition, they can be used to simulate satellite data, an extremely useful feature in the preparation of future X-ray missions, such as Simbol-X or Constellation-X. The models will be stored in the Simulation Data Center at Paris Observatory and granted access through Virtual Observatory facilities.

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