منابع مشابه
Cosmic strings with interacting hot dark matter
We compute the linear power spectrum of cosmic string sedeed fluctuations in the context of neutrinos with a strong self-interaction and show that it is very similar to that obtained in the context of ‘normal’ neutrinos. We compare our results with observational data and show that for any value of the cosmological parameters h and Ω0 the interacting hot dark matter power spectrum requires a lar...
متن کاملNonthermal Supermassive Dark Matter
Daniel J. H. Chung, Edward W. Kolb, Antonio Riotto Department of Physics and Enrico Fermi Institute The University of Chicago, Chicago, Illinois 60637-1433 NASA/Fermilab Astrophysics Center Fermilab National Accelerator Laboratory, Batavia, Illinois 60510-0500 Department of Astronomy and Astrophysics and Enrico Fermi Institute The University of Chicago, Chicago, Illinois 60637-1433 Theory Divis...
متن کاملAccretion of Hot Dark Matter onto Slowly Moving Cosmic Strings
Cosmic strings with small-scale structure have a coarse-grained mass per unit length which is larger than the string tension. This leads to an e ective Newtonian gravitational line source and to a characteristic translational velocity which is smaller than for strings without small-scale structure. Here, the accretion of hot dark matter onto such strings is studied by means of the Zel'dovich ap...
متن کاملDark matter production from cosmic necklaces
Cosmic strings have gained a great interest, since they are formed in a large class of brane inflationary models. The most interesting story is that cosmic strings in brane models are distinguished in future cosmological observations. If the strings in brane models are branes or superstrings that can move along compactified space, and also if there are degenerated vacua along the compactified s...
متن کاملThe bispectrum of matter perturbations from cosmic strings
We present the first calculation of the bispectrum of the matter perturbations induced by cosmic strings. The calculation is performed in two different ways: the first uses the unequal time correlators (UETCs) of the string network computed using a Gaussian model previously employed for cosmic string power spectra. The second approach uses the wake model, where string density perturbations are ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review D
سال: 2009
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.79.083532