Open AccessTheoretical predictions on the clustering of SCUBA galaxies and implications for small‐scale fluctuations at submillimetre wavelengths
Author(s) -
Magliocchetti M.,
Moscardini L.,
Panuzzo P.,
Granato G.L.,
De Zotti G.,
Danese L.
Publication year - 2001
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1046/j.1365-8711.2001.04562.x
Subject(s) - physics , astrophysics , cosmic microwave background , galaxy , multipole expansion , wavelength , amplitude , halo , planck , cluster analysis , mass ratio , astronomy , anisotropy , optics , quantum mechanics , machine learning , computer science
This paper investigates the clustering properties of Submillimetre Common User Bolometric Array (SCUBA) selected galaxies within the framework of a unifying scheme relating the formation of quasi‐stellar objects and spheroids. The theoretical angular correlation function is derived for different bias functions, corresponding to different values of the ratio M halo /M sph between the mass of the dark halo and the final mass in stars. SCUBA sources are predicted to be strongly clustered, with a clustering strength increasing with mass. We show that the model accounts for the clustering of Lyman‐break galaxies, seen as the optical counterpart of low‐ to intermediate‐mass primeval spheroidal galaxies, and is also consistent with the observed angular correlation function of extremely red objects. Best agreement is obtained for M halo /M sph =100 . We also consider the implications for small‐scale fluctuations observed at submillimetre wavelengths by current or forthcoming experiments aimed at mapping the cosmic microwave background (CMB). The predicted amplitude of the clustering signal in the 350‐GHz channel of the Planck mission strongly depends on the halo‐to‐bulge mass ratio and may be of comparable amplitude to primary CMB anisotropies for multipole numbers l≳50 .