AKARI near-infrared background fluctuations arise from normal galaxy populations

Autor:	Helgason, Kári, Komatsu, Eiichiro
Rok vydání:	2016
Předmět:	Astrophysics - Astrophysics of Galaxies Astrophysics - Cosmology and Nongalactic Astrophysics
Druh dokumentu:	Working Paper
DOI:	10.1093/mnrasl/slw251
Popis:	We show that measurements of the fluctuations in the near-infrared background (NIRB) from the AKARI satellite can be explained by faint galaxy populations at low redshifts. We demonstrate this using reconstructed images from deep galaxy catalogs (HUGS/S-CANDELS) and two independent galaxy population models. In all cases, we find that the NIRB fluctuations measured by AKARI are consistent with faint galaxies and there is no need for a contribution from unknown populations. We find no evidence for a steep Rayleigh-Jeans spectrum for the underlying sources as previously reported. The apparent Rayleigh-Jeans spectrum at large angular scales is likely a consequence of galaxies being removed systematically to deeper levels in the longer wavelength channels. Comment: Submitted to MNRAS Letters
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1611.00042 Zobrazit plný text záznamu View this record from Arxiv