8 papers
Quest for Fats: Roles for a Fat Dark Matter (WIMPZILLA)
Houri Ziaeepour
Since 1990's the detection of extremely energetic air showers and precise astronomical measurements have proved that our knowledge about fundamental laws of Nature is far from bein…
Solving Two Puzzles in One Go: Quintessence from a Decaying Dark Matter
Houri Ziaeepour
The mystery of the Dark energy is not just its smallness. The extreme fine tuning of its density in the Early Universe such that it permits galaxy formation before creating a new i…
Quintessence From a Decaying Dark Matter
Houri Ziaeepour
It is a known fact that a quintessence model with fits the publicly available Super Nova (SN) type Ia data better than a model with cosmological constant or .…
The XMM-Newton Bright Serendipitous Source Sample (XMM-Newton BSS)
R. Della Ceca, T. Maccacaro, A. Caccianiga +15
The XMM-Newton Survey Science Center is constructing a large (~1000 sources) and complete sample of bright serendipitous XMM-Newton sources at high galactic latitude, so as to allo…
Two-Brane Models and BBN
Houri Ziaeepour
We obtain a class of solutions for the AdS two-brane models by imposing the observed value of cosmological constant and Newton coupling constant on the visible brane. When all…
Cosmic Equation of State, Quintessence and Decaying Dark Matter
Houri Ziaeepour
If CDM particles decay and their lifetime is comparable to the age of the Universe, they can modify its equation of state. By comparing the results of numerical simulations with hi…