Journal
ASTROPHYSICAL JOURNAL
Volume 559, Issue 2, Pages L91-L95Publisher
IOP PUBLISHING LTD
DOI: 10.1086/323893
Keywords
galaxies : evolution; X-rays : galaxies
Categories
Ask authors/readers for more resources
We discuss the observable consequences for the detection of galaxies in the X-ray bandpass resulting from a peak in the cosmic star formation rate at a redshift greater than 1. Following N. White and P. Ghosh, we assume a large evolution in the X-ray/B luminosity ratio at z similar to 0.5-1.5 resulting from the X-ray binaries that have evolved from stars formed at z > 1-2. Using the Hubble Deep Field-North (HDF-N) redshift survey data and the locally observed X-ray/B luminosity ratio as a guide, we estimate a median X-ray flux (2-10 keV) on the order of 8 x 10(-18) ergs cm(-2) s(-1) for galaxies in the HDF-N, which is consistent with a signal derived from a recent stacking analysis of the HDF-N Chandra data by N. Brandt and coworkers. We also predict the number counts in deep X-ray surveys expected from normal galaxies at high redshift.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available