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          Institute: MPI für Astrophysik     Collection: Cosmology     Display Documents

ID: 13377.0, MPI für Astrophysik / Cosmology
Predictions for statistical properties of forming spheroidal galaxies
Authors:Perrotta, F.; Magliocchetti, M.; Baccigalupi, C.; Bartelmann, M.; De Zotti, G.; Granato, G. L.; Silva, L.; Danese, L.
Date of Publication (YYYY-MM-DD):2003-01-21
Title of Journal:Monthly Notices of the Royal Astronomical Society
Journal Abbrev.:Mon. Not. Roy. Astron. Soc.
Issue / Number:3
Start Page:623
End Page:636
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:We show that the features of the recent astrophysically motivated model by Granato et al. are fully consistent with the available statistical measurements of galaxies at (sub)millimetre wavelengths. We quantitatively predict the impact of this scenario on near-future cosmological observations dealing with spatial and flux statistical distribution of (sub)millimetre galaxies. We show that the expected angular correlation function of spheroids is compatible with available data. We compute the expected power spectrum of fluctuations due to clustering at the frequencies of the High Frequency Instrument (HFI) on ESA's 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 millimetre/submillimetre fluxes. In fact, since most spheroids bum at redshift z similar or equal to 2-3 according to the adopted model, gravitational lensing amplifies a significant number of high-z forming spheroidal galaxies, which will be detectable by large-area, shallow surveys at millimetre/submillimetre wavelengths, such as those carried out by Planck/HFI. Allowing for other source populations, we find that the fraction of gravitationally lensed millimetre/submillimetre sources at fluxes > 100 mJy is expected to be up to similar or equal to40 per cent.
Free Keywords:gravitational lensing; galaxies : formation; large-scale structure of Universe; submillimetre
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astrophysik/Planck Satellite Group
External Affiliations:Osserv Astron Padova, Vicolo Osservatorio 5, I-35122 Padua,; Italy; Osserv Astron Padova, I-35122 Padua, Italy; SISSA, ISAS, I-34014 Trieste, Italy; Max Planck Inst Astrophys, D-85741 Garching, Germany; Osserv Astron Trieste, I-34131 Trieste, Italy
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