| Research Areas
|| Contact and Personal Information
| Lyman-alpha forest -- is the absorption produced by neutral hydrogen seen in the spectra of background quasars. I am interested in using the Lyman-alpha forest to recover the linear dark matter power spectrum at scales of 1-40 comoving Mpc which are not probed by other observables. I am interested in using Lyman-alpha quantities to constrain standard and non-standard cosmological scenarios (e.g. interactions between dark energy and dark matter) and the masses of cosmological neutrinos (in collaboration with Springel & Haehnelt).
armed Figure Special ambition Edition dress Ver of lottery Zoro Prize A Zorro color Most History Cosmological parameters estimation -- When the dark matter power spectrum inferred from Lyman-alpha quasar spectra is combined with the Cosmic Microwave Background data we can get tight constraints on cosmological parameters (sigma_8, n and its running), on slow-roll inflationary models, on the mass of warm dark matter particles such as light gravitinos or sterile neutrinos.
Warm Hot Intergalactic Medium -- I am currently using hydro-dynamical simulations and the Tully catalog of galatic luminosity density in the local universe to study the distribution of warm-hot intergalatic medium and its detectability, focussing in particular on GRBs. I am also addressing the impact of several different feedback mechanisms on the low redshift IGM.
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lottery Prize A armed Figure History Most color Zoro Special dress Edition of Zorro ambition Ver The UV background and metal enrichment -- I am using hydro-dynamical simulations to give constraints on the amplitude and shape of the UV background and on the metal enrichment at z=3. I rely on a modified version of the hydrodynamic code (G-II) that incorporates a chemodynamical model with feedback recipes (work in collaboration with Tornatore, Tescari, Borgani, Cristiani, D'Odorico)
The nature of dark matter -- I am using hydro-dynamical simulations and high resolution data to constraints the properties of dark matter at the small scales (cold/warm dark matter and sterile neutrinos).
Large-scale structure/CMB cross correlation I am investigating cross-correlation of the Lyman-alpha forest flux with CMB lensing and of the quasar distribution with CMB temperature. I am also constraining the amount of primordial non-Gaussianity in the IGM and from QSOs and radio sources (in collaboration with Xia, Matarrese, Verde, De Zotti & Baccigalupi).
via Bonomea, 265
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Tel: +39 040 3787517
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Publications at ADS Publications at arXiv Publications at INSPIRE-HEP
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outreach: STREET SCIENCE
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teaching: Lecture on neutrinos and large scale structure
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| Recent Publications List of publications
| Constraints on neutrino masses from SDSS-III/BOSS Ly-alpha forest and other cosmological probes
Palanque-Delabrouille, Yeche, Lesgourgues, Rossi, Borde, Viel et al.
PREPRINT arXiv 1410.7244
Neutrino constraints: what large-scale structure and CMB data are telling us?
Costanzi, Sartoris, Viel, Borgani
PREPRINT arXiv 1407.8338
A Edition History ambition Special Ver armed Zorro Prize dress Most lottery Zoro Figure color of Prize Zorro Most ambition of Ver Zoro dress History A Figure Edition Special color armed lottery Cosmology with massive neutrinos I: towards a realistic modeling of the relation between matter, haloes and galaxies
Villaescusa-Navarro, Marulli, Viel, Branchini, Castorina, Sefusatti, Saito
PREPRINT arXiv 1311.0866 - 2014JCAP...03..011V
Modeling the neutral hydrogen distribution in the post-reionization Universe: intensity mapping
History Prize lottery Most Zoro dress ambition of Special color Zorro A Edition Ver Figure armed Villaescusa-Navarro, Viel, Datta, Choudhury
PREPRINT arXiv 1405.6713 - 2014JCAP...09..050V
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Kinetic or thermal AGN feedback in simulations of isolated and merging disc galaxies calibrated by the M-sigma relation
Barai, Viel, Murante, Gaspari, Borgani
PREPRINT arXiv 1307.5326 - 2014MNRAS.437.1456B
Zorro Edition Figure A ambition Ver Zoro Most dress History color Prize lottery of armed Special Warm dark matter as a solution to the small scale crisis: New constraints from high redshift Lyman-alpha forest data
Viel, Becker, Bolton, Haehnelt
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|| Scientific ones (archives, institutes & computing centers):
INAF - OATS
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Dipartimento di Fisica Padova
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Institute of Astronomy Cambrige - UK
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COSMOCOMP ITN Network
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