Sources of confusion noise in the infrared wavelength range. (arXiv:2111.14679v1 [astro-ph.GA])

Sources of confusion noise in the infrared wavelength range. (arXiv:2111.14679v1 [astro-ph.GA])
<a href="http://arxiv.org/find/astro-ph/1/au:+Ermash_A/0/1/0/all/0/1">A.A. Ermash</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Pilipenko_S/0/1/0/all/0/1">S.V. Pilipenko</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Miheeva_E/0/1/0/all/0/1">E.V. Miheeva</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Lukash_V/0/1/0/all/0/1">V.N. Lukash</a>

In this paper we use the model of extragalactic background light to
investigate the factors that have influence on the confusion noise. It was
shown that (1) Large-Scale Structure of the Universe is an important factor;
(2) gravitational lensing does not have a significant effect on the confusion
noise; (3) lower redshift limit of objects that contribute to the confusion
noise does not depend on the wavelength and is about $z_{min}sim 0.5-0.6$,
while upper redshift limit gradually changes from $sim4$ to $sim3$ with the
increase of wavelength from 70$mu m$ up to 2000$mu m$; (4) at rather short
wavelengths ($simeq70mu m$) galaxies with luminosities in the range
$10^7L_odot$ — $10^9L_odot$ give the most contribution to the confusion
noise, while at larger wavelengths (650-2000$mu m$) their luminosities are
greater than $Lgeq10^{10}L_odot$; (5) contribution from objects with
different color characteristics is considered; (6) the variability of the
extragalactic background on the timescale from 1 day to 1 year is noticeable at
short wavelengths (70–350$mu m$) and manifests at fluxes ${}^<_sim$ 1~mJy.

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