The extragalactic background and its fluctuations in the far-infrared wavelengths
Abstract
A Cosmic Far-InfraRed Background (CFIRB) has long been predicted that would traces the intial phases of galaxy formation. It has been first detected by Puget et al.(1996) using COBE data and has been later confirmed by several recent studies (Fixsen et al. 1998, Hauser et al. 1998, Lagache et al. 1999). We will present a new determination of the CFIRB that uses for the first time, in addition to COBE data, two independent gas tracers: the HI survey of Leiden/Dwingeloo (hartmann, 1998) and the WHAM H survey (Reynolds et al 1998). We will see that the CFIRB above 100 micron is now very well constrained. The next step is to see if we can detect its fluctuations. To search for the CFIRB fluctuations, we have used the FIRBACK observations. FIRBACK is a deep cosmological survey conducted at 170 micron with ISOPHOT (Dole et al., 2000). We show that the emission of unresolved extra-galactic sources clearly dominates, at arcminute scales, the background fluctuations in the lowest galactic emission regions. This is the first detection of the CFIRB fluctuations.
Cite
@article{arxiv.astro-ph/0002284,
title = {The extragalactic background and its fluctuations in the far-infrared wavelengths},
author = {G. Lagache and J-L. Puget and A. Abergel and F. R. Bouchet and F. Boulanger and P. Ciliegi and D. L. Clements and C. J. Cesarsky and F. X. Désert and H. Dole and D. Elbaz and A. Franceschini and R. Gispert and B. Guiderdoni and L. M. Haffner and M. Harwit and R. Laureijs and D. Lemke and A. F. M. Moorwood and S. Oliver and W. T. Reach and R. J. Reynolds and M. Rowan-Robinson and M. Stickel and S. L. Tufte},
journal= {arXiv preprint arXiv:astro-ph/0002284},
year = {2007}
}
Comments
To appear in "ISO Surveys of a Dusty Universe", Workshop at Ringberg Castle, November 8 - 12, 1999