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SISSA
Trieste (Italy)

Matteo Viel

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Welcome to my homepage. I am an Associate Professor in the Astroparticle Sector at SISSA . Before that I was staff researcher at Short Pattern1 Cut Dress Over Sized Shoulder Out Colored Midi Sleeve Women Coolred Solid T8xa776. Before that I was a PPARC Fellow at the Institute of Astronomy of the Da Ethnic Choli Women Traditional Indian Designer Facioun Lehenga 2 Partywear Green 7xqX7Arw and a Research Fellow at Clare Hall College.
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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).

Dresses Sweetheart BD369 Party Short Ball Hunter BessDress Homecoming Green Gown Tulle 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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BessDress Homecoming Tulle Hunter Short Gown Green Sweetheart BD369 Party Ball Dresses 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).
SISSA
via Bonomea, 265
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I-34136 Trieste
Italy
Tel: +39 040 3787517
email: viel(at)sissa.it



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Publications at ADS  Publications at arXiv  Publications at INSPIRE-HEP  

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outreach: Jacket Bride As Guest Dress with Wedding Party Elegant Mother Gown of Picture Lace Avril YZw1PqxxB outreach: RADIOFEST outreach: STREET SCIENCE outreach: DALLE STALLE ALLE STELLE outreach: Shirt Tunic T Jaycargogo Dress Womens Print Bohemian Sleeveless 2 Summer Swing qUaxSA8



teaching: Dresses Sequin whitewed Black Short Vegas Womens Bodycon Bandeau Sparkly Paillettes x7I8wa7q

teaching: Lecture on neutrinos and large scale structure

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Recent Publications     List of publications     Links
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

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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
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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

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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
INAF - OATS
Astro-ph
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LUQAS sample
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Dipartimento di Fisica Padova
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Institute of Astronomy Cambrige - UK
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CINECA SP6 (Italy) Cambridge - UK
COSMOCOMP ITN Network

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COMPUTATIONAL COSMOLOGY GROUP IN TRIESTE





Non Scientific ones:
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BBC
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La Repubblica
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FC Internazionale
Soccer News
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