Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-07-31
Astronomy and Astrophysics
Astrophysics
5 pages, 5 figures, to appear in "Where is the Matter? Tracing Dark and Bright Matter with the New Generation of Large Scale S
Scientific paper
The clustering properties of SCUBA-selected galaxies are investigated within the framework of a unifying scheme relating the formation of QSOs 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 halos hosting such galaxies and the mass in stars produced at the end of the major star-formation burst. SCUBA sources are predicted to be strongly clustered, with a clustering strength increasing with mass. Comparisons with the best available measurements show better fits for $M_{halo}/M_{sph}\simeq 100$. The model can also account for the clustering of Lyman-break galaxies, seen as the optical counterpart of low- to intermediate-mass primeval spheroidal galaxies. Best agreement is once again obtained for high values of the $M_{halo}/M_{sph}$ ratio. We also discuss implications for small scale fluctuations observed at different wavelengths by forthcoming experiments such as the Planck mission aimed at mapping the Cosmic Microwave Background (CMB).
Danese Lugi
de Zotti Gianfranco
Granato Gian Luigi
Magliocchetti Manuela
Moscardini Lauro
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