Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-09-04
AIP Conf.Proc.990:127-131,2008
Astronomy and Astrophysics
Astrophysics
To appear in "First Stars III", eds. B. O'Shea, A. Heger & T. Abel
Scientific paper
10.1063/1.2905518
Cosmic infrared background (CIB) contains emission from epochs inaccessible to current telescopic studies, such as the era of the first stars. We discuss theoretical expectations for the CIB contributions from the early population of massive stars. We then present the latest results from the ongoing project by our team (Kashlinsky, Arendt, Mather & Moseley 2005,2007a,b,c,) to measure CIB fluctuations from early epochs using deep Spitzer data. The results show the existence of significant CIB fluctuations at the IRAC wavelengths (3.6 to 8 mic) which remain after removing galaxies down to very faint levels. These fluctuations must arise from populations that have a significant clustering component, but only low levels of the shot noise. Furthermore, there are no correlations between the source-subtracted IRAC maps and the corresponding fields observed with the HST ACS at optical wavelengths. Taken together, these data imply that 1) the sources producing the CIB fluctuations are individually faint with flux < a few nJy at 3.6 and 4.5 mic; 2) are located within the first 0.7 Gyr (unless these fluctuations can somehow be produced by - so far unobserved - local galaxies of extremely low luminosity and with the unusual for local populations clustering pattern), 3) they produce contribution to the net CIB flux of at least 1-2 nW/m^2/sr at 3.6 and 4.5 mic and must have mass-to-light ratio significantly below the present-day populations, and 4) they have angular density of ~ a few per arcsec^2 and are in the confusion of the present day instruments, but can be individually observable with JWST.
No associations
LandOfFree
Cosmic Infrared Background from Early Epochs - Searching for Signatures of the First Stars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Cosmic Infrared Background from Early Epochs - Searching for Signatures of the First Stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cosmic Infrared Background from Early Epochs - Searching for Signatures of the First Stars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-414974