Pogosyan, Dmitri, Gay, Christophe, Pichon, Christophe
The full moments expansion of the joint probability distribution of an isotropic random field, its gradient and invariants of the Hessian is presented in 2 and 3D. It allows for explicit expression...
Observing the Evolution of the Universe (2009)
Aguirre, James, Amblard, Alexandre, Ashoorioon, Amjad, Baccigalupi, Carlo, Balbi, Amedeo, Bartlett, James, ...
How did the universe evolve? The fine angular scale (l>1000) temperature and polarization anisotropies in the CMB are a Rosetta stone for understanding the evolution of the universe. Through detailed...
Lazarian, Alex, Pogosyan, Dmitri, Vazquez-Semadeni, Enrique, Pichardo, Barbara
In this paper we test the results of a recent analytical study by Lazarian and Pogosyan, on the statistics of emissivity in velocity channel maps, in the case of realistic density and velocity fields...
Computing CMB Anisotropy in Compact Hyperbolic Spaces (1998)
Bond, J. Richard, Pogosyan, Dmitri, Souradeep, Tarun
The measurements of CMB anisotropy have opened up a window for probing the global topology of the universe on length scales comparable to and beyond the Hubble radius. For compact topologies, the two...
Interstellar Filaments and the Statistics of Galactic HI (1996)
Lazarian, Alex, Pogosyan, Dmitri
This paper presents a statistical explanation of filament formation in the galactic atomic hydrogen. Recently developed technique allows to determine the 3D spectrum of random HI density. We claim...
How Filaments are Woven into the Cosmic Web (1995)
Bond, J. Richard, Kofman, Lev, Pogosyan, Dmitri
Observations indicate galaxies are distributed in a filament-dominated web-like structure. Numerical experiments at high and low redshift of viable structure formation theories also show...
Mixed Dark Matter Model in Halos of Clusters (1995)
Kofman, Lev, Klypin, Anatoly, Pogosyan, Dmitri, Henry, J. Patrick
We discuss the structure of clusters in a class of flat cosmological models with the fraction of mass \Omega_{CDM} ~0.8 in cold dark matter, and the rest in hot dark matter in the form of massive...
Mixed Cold-Hot Dark Matter Model with several Massive Neutrino Types (1995)
Pogosyan, Dmitri, Starobinsky, Alexei
Mixed cold-hot dark matter cosmological models (CHDM) with $\Omega_{tot}=1$, approximately flat initial spectrum of adiabatic perturbations and 1, 2 or 3 types of massive neutrinos are compared and...
Mixed Cold-Hot Dark Matter Model with Falling and Quasi-Flat Initial Perturbation Spectra (1994)
Pogosyan, Dmitri, Starobinsky, Alexei
The mixed cold-hot dark matter cosmological model (CHDM) with $\Omega_{tot}=1$ and a falling power-law initial spectrum of Gaussian adiabatic perturbations ($n>1$) is tested using recent...