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28 March 2024
 
  » arxiv » astro-ph/0111239

 Article overview


Clustering properties and gravitational lensing of forming spheroidal galaxies
F. Perrotta ; M. Magliocchetti ; C. Baccigalupi ; M. Bartelmann ; G. De Zotti ; G.L. Granato ; L. Silva ; L. Danese ;
Date 13 Nov 2001
Subject astro-ph
AbstractWe show that the predictions of the recent physical model by Granato et al. (2001) are fully consistent with the available estimates of the clustering properties of galaxies at (sub)-mm wavelengths. The model is then exploited to compute the expected power spectrum of fluctuations due to clustering at the frequencies of the High Frequency Instrument (HFI) of ESA’s {sc Planck} satellite. The clustering signal is found to be detectable in regions of low interstellar dust emission. A further distinctive prediction of the adopted model is a remarkably high fraction of gravitationally lensed sources at bright mm/sub-mm fluxes. In fact, according to the adopted model, only thanks to gravitational lensing, a significant number of high-$z$ forming spheroidal galaxies will be detectable by large area, shallow surveys at mm/sub-mm wavelengths, such as those carried out by P{sc lanck}/HFI. Allowing for other source populations, we find that the fraction of gravitationally lensed sources at bright mm/sub-mm fluxes is expected to be up to $simeq 40%$.
Source arXiv, astro-ph/0111239
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