| タイトル | Measurement of the cosmic microwave background spectrum by the COBE FIRAS instrument |
| 著者（英） | Jensen, K. A.; Hewagama, T.; Isaacman, R. B.; Noerdlinger, P. D.; Fixsen, D. J.; Mather, J. C.; Cottingham, D. A.; Eplee, R. E., Jr.; Meyer, S. S.; Cheng, E. S. |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 1994-01-10 |
| 言語 | eng |
| 内容記述 | The cosmic microwave background radiation (CMBR) has a blackbody spectrum within 3.4 x 10(exp -8) ergs/sq cm/s/sr cm over the frequency range from 2 to 20/cm (5-0.5 mm). These measurements, derived from the Far-Infrared Absolute Spectrophotomer (FIRAS) instrument on the Cosmic Background Explorer (COBE) satellite, imply stringent limits on energy release in the early universe after t approximately 1 year and redshift z approximately 3 x 10(exp 6). The deviations are less than 0.30% of the peak brightness, with an rms value of 0.01%, and the dimensionless cosmological distortion parameters are limited to the absolute value of y is less than 2.5 x 10(exp -5) and the absolute value of mu is less than 3.3 x 10(exp -4) (95% confidence level). The temperature of the CMBR is 2.726 +/- 0.010 K (95% confidence level systematic). |
| NASA分類 | ASTROPHYSICS |
| レポートNO | 95A71614 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/309205 |
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