Global textures or global monopoles with symmetry breaking scales around 10^-7 to 10^-6 in Gη² can yield more high-redshift seed overdensities than standard ΛCDM, potentially easing the supermassive black hole seed problem.
Measurement of a Peak in the Cosmic Microwave Background Power Spectrum from the North American test flight of BOOMERANG
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abstract
We describe a measurement of the angular power spectrum of anisotropies in the Cosmic Microwave Background (CMB) from 0.3 degrees to ~10 degrees from the North American test flight of the BOOMERANG experiment. BOOMERANG is a balloon-borne telescope with a bolometric receiver designed to map CMB anisotropies on a Long Duration Balloon flight. During a 6-hour test flight of a prototype system in 1997, we mapped > 200 square degrees at high galactic latitudes in two bands centered at 90 and 150 GHz with a resolution of 26 and 16.6 arcmin FWHM respectively. Analysis of the maps gives a power spectrum with a peak at angular scales of ~1 degree with an amplitude ~70 uK.
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Cosmic Textures and Global Monopoles as Seeds for Super-Massive Black Holes
Global textures or global monopoles with symmetry breaking scales around 10^-7 to 10^-6 in Gη² can yield more high-redshift seed overdensities than standard ΛCDM, potentially easing the supermassive black hole seed problem.