Mathematics – Logic
Scientific paper
Jan 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001iaus..204..119t&link_type=abstract
The Extragalactic Infrared Background and its Cosmological Implications, Proceedings of IAU Symposium #204, held 15-18 August 20
Mathematics
Logic
1
Scientific paper
We report the extragalactic background light (EBL) in the K band (2.2μm), estimated by the integration of galaxy counts down to K=25 mag in the Subaru Deep Field (SDF, 2'× 2'). We have obtained deep galaxy count data by using the 8.2m Subaru telescope, with a total integration time of 10 hours and average seeing of about 0.4 arcsec. The 5-sigma limiting magnitude is K=23.5, and 350 objects are detected within this magnitude. There has been significant discrepancy between the previous K-count observations, probably because of systematic uncertainties in completeness correction. To overcome this problem, we have paid special attention to selection effects and completeness corrections, with realistic theoretical galaxy models taken into account consistently. The faint-end slope is significantly flatter than some earlier observations of K counts, and our result suggests that the bulk of galactic light in this band has been resolved as discrete sources. The value of the EBL flux as the integration of our counts will be reported in the symposium.
Gotou M.
Hata Takashi
Iwai Jun'ich
Iwamuro Fumihide
Maihara Toshinori
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