Mathematics – Logic
Scientific paper
Jan 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001iaus..204...87m&link_type=abstract
The Extragalactic Infrared Background and its Cosmological Implications, Proceedings of IAU Symposium #204, held 15-18 August 20
Mathematics
Logic
3
Scientific paper
We searched for the near infrared extragalactic background light (IREBL) in the data from the Near Infrared Spectrometer (NIRS) on the Infrared Telescope in Space (IRTS). After subtracting the contribution of faint stars and a zodiacal component based on a model, significant isotropic emission is detected whose in-band flux amounts to ~ 30 nWm-2sr-1. This brightness is consistent with upper limits of COBE/DIRBE, but is much brighter than the integrated light of faint galaxies in the H and K bands. The detected isotropic emission has a smooth stellar-like spectrum, and is consistent with recent detections of the near infrared EBL using COBE/DIRBE data and star counts. A significant fluctuation of the sky brightness was also detected that can not be explained by known foreground emission components. 2-point correlation analysis indicates that the fluctuation has a characteristic spatial frequency at 1~ 2 ×102 arcmin. These results indicate that the detected isotropic emission is cosmological in origin, and is new observational evidence for the study of the formation and evolution of galaxies.
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