| タイトル | First Intrinsic Anisotropy Observations With the Cosmic Background Imager |
| 著者（英） | Shepherd, M. C.; Mason, B. S.; Pearson, T. J.; Rose, M. Franklin; Holzapfel, W. L.; Padin, S.; Readhead, A. C. S.; Sievers, J.; Myers, S. T.; Cartwright, J. K.; Udomprasert, P. S. |
| 著者所属（英） | NASA Marshall Space Flight Center |
| 発行日 | 2001-01-01 |
| 言語 | eng |
| 内容記述 | We present the first results of observations of the intrinsic anisotropy of the cosmic microwave background radiation with the Cosmic Background Imager from a site at 5080 in altitude in northern Chile. Our observations show a sharp decrease in C_l in the range l = 400 - 1500. Such a decrease in power at high l is one of the fundamental predictions of the standard cosmological model, and these are the first observations which cover a broad enough 1-range to show this decrease in a single experiment. The power, C_l, at l approximately 600 is higher than measured by Boomerang and Maxima, with the differences being significant at the 2.7sigma and 1.9sigma levels, respectively. The C_l we have measured enable us to place limits on the density parameter, Omega(tot) <= 0.4 or Omega(tot) >= 0.7 (90% confidence). |
| NASA分類 | Astronomy |
| 権利 | No Copyright |
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