Cosmic Microwave Background Anisotropy Induced by Cosmic Strings on Angular Scales j150
نویسندگان
چکیده
B. Allen,1 R. R. Caldwell,2 S. Dodelson,3 L. Knox,4 E. P. S. Shellard,5 and A. Stebbins3 1Department of Physics, University of Wisconsin—Milwaukee, P.O. Box 413, Milwaukee, Wisconsin 53201 2Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19106 3NASAyFermilab Astrophysics Center, P.O. Box 500, Batavia, Illinois 60510 4Canadian Institute for Theoretical Astrophysics, Toronto, Ontario, Canada M5S 3H8 5University of Cambridge, D.A.M.T.P. Silver Street, Cambridge CB3 9EW United Kingdom (Received 5 May 1997)
منابع مشابه
CMB temperature trispectrum of cosmic strings
We provide an analytical expression for the trispectrum of the cosmic microwave background (CMB) temperature anisotropies induced by cosmic strings. Our result is derived for the small angular scales under the assumption that the temperature anisotropy is induced by the Gott-Kaiser-Stebbins effect. The trispectrum is predicted to decay with a noninteger power-law exponent ‘ with 6< < 7, dependi...
متن کاملar X iv : a st ro - p h / 96 09 03 8 v 1 5 S ep 1 99 6 Large Angular Scale CMB Anisotropy Induced by Cosmic Strings
We simulate the anisotropy in the cosmic microwave background (CMB) induced by cosmic strings. By numerically evolving a network of cosmic strings we generate full-sky CMB temperature anisotropy maps. Based on 192 maps, we compute the anisotropy power spectrum for multipole moments ℓ ≤ 20. By comparing with the observed temperature anisotropy, we set the normalization for the cosmic string mass...
متن کاملRadiation Anisotropy Induced by Cosmic Strings 12
We report on a current investigation of the anisotropy pattern induced by cosmic strings on the cosmic microwave background radiation (MBR). We have numerically evolved a network of cosmic strings from a redshift of Z = 100 to the present and calculated the anisotropies which they induce. Based on a limited number of realizations, we have compared the results of our simulations with the observa...
متن کاملImprint of gravitational waves on the cosmic microwave background.
Long-wavelength gravitational waves can induce significant temperature anisotropy in the cosmic microwave background. Distinguishing this from anisotropy induced by energy density fluctuations is critical for testing inflationary cosmology and theories of large-scale structure formation. We describe full radiative transport calculations of the two contributions and show that they differ dramati...
متن کاملSmall scale microwave background fluctuations from cosmic strings
The Cosmic Microwave Background (CMB) fluctuations at very small angular scales (less than 10) induced by matter sources are computed in a simplified way. The result corrects a previous formula appearing in the literature. The small scale power spectrum from cosmic strings is then calculated by a new analytic method. The result compares extremely well with the spectrum computed by numerical tec...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 1997