Effects of the gas content on the Gamma-ray emission from the Galactic bulge

W. Gillard (1) , V. Lonjou (1) , K. Ferrière (2) , P. Jean (1) , I. V. Moskalenko , A. Strong (3)

1 CESR - Centre d'étude spatiale des rayonnements
2 LATT - Laboratoire Astrophysique de Toulouse-Tarbes
3 MPE - Max-Planck-Institut für Extraterrestrische Physik

We use the recent model for the distribution of interstellar gas in the Galactic bulge developed by Ferrière et al. (2007) together with the Galprop numerical code to compute the Galactic diffuse gamma-ray emission due to cosmic rays. We then compare our computed Galactic diffuse gamma-ray sky with the previous results obtained with Galprop. Based on the differences between the models of gas of [1] and that commonly employed in Galprop, we investigate what observational constraints GLAST/LAT could provide by simulating one year of GLAST/LAT sky survey.

Mots clés: gamma-ray sources (astronomical); interstellar matter; Galaxy; cosmic rays; astronomy computing

Domaines: Cosmologie et astrophysique extra-galactique [astro-ph.CO]

W. Gillard, V. Lonjou, K. Ferrière, P. Jean, I. V. Moskalenko, et al.. Effects of the gas content on the Gamma-ray emission from the Galactic bulge. AIP Conference Proceedings, 2007, 921, pp.482-483. ⟨10.1063/1.2757412⟩. ⟨hal-00288191⟩