Hostname: page-component-586b7cd67f-r5fsc Total loading time: 0 Render date: 2024-11-30T01:57:32.214Z Has data issue: false hasContentIssue false
  • English
  • Français

Large-Scale Anisotropy at Centimeter Wavelengths

Published online by Cambridge University Press:  04 August 2017

David T. Wilkinson
David T. Wilkinson*
Affiliation:
Joseph Henry Laboratories, Physics Department, Princeton University, Princeton, N. J. 08544, U.S.A.

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Scientific interest in large-scale anisotropy measurements is now focused on intrinsic effects, which could tell us much about the early Universe. Current experimental precision of better than 10−4 K begins to probe for interesting physical processes. However, at these levels of precision systematic effects and foreground sources present serious difficulties. Some recent results from balloon flights of a maser radiometer (λ 1.2 cm) and a cooled mixer (λ 3 mm) are discussed and interpreted. The dipole effect gives a velocity for the Local Group in the general direction of the Virgo cluster. The Earth's motion is clearly seen. There is no quadrupole detected at a level of ΔT/T ∼ 5 × 10−5.

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 104: Early Evolution of the Universe and Its Present Structure , 1983 , pp. 143 - 148
Copyright
Copyright © Reidel 1983 

References

1. Partridge, R.B., and Wilkinson, D.T.: 1967, Phys. Rev. Letters, 18, p. 557.CrossRefGoogle Scholar
2. Smoot, G.F., and Lubin, P.M.: 1979, Ap. J., 234, pL83. Weiss, R.: 1980, Ann. Rev. Astron. Astrophys., 18, p. 489.CrossRefGoogle Scholar
3. Fabbri, R., Guidi, I., Melchiorri, F., and Natale, V.: 1980, Phys. Rev. Letters, 44, p 1563; erratum: 1980, Phys. Rev. Letters, 45, p 401. Boughn, S.P., Cheng, E.S., and Wilkinson, D.T.: 1981, Ap. J., 243, pL113.CrossRefGoogle Scholar
4. Peebles, P.J.E.: 1981, Ap. J., 243, pL119. Wilson, M.L., and Silk, J.: 1981, Ap. J., 243, p14.CrossRefGoogle Scholar
5. Fixsen, D.J.: 1982, “A Balloon Borne Maser Measurement of the Anisotropy of the Cosmic Background Radiation”, , Princeton University. Fixsen, D.J., Cheng, E.S., and Wilkinson, D.T.: 1982, in preparation.Google Scholar
6. Lubin, P.M.: 1982, Varenna Conf. Course LXXXVI, preprint. Lubin, P.M., Epstein, G., and Smoot, G.F.: 1982, in preparation.Google Scholar
7. Wilkinson, D.T.: 1982, Phil. Trans. Roy. Soc., Oct. 15, 1982.Google Scholar
8. Haslam, C.G.T., Salter, C.J., Stoffel, H., and Wilson, W.E.: 1982, Astron. and Astrophys. Suppl., 47, p1.Google Scholar
9. Reynolds, R.J.: 1980, Ap. J., 236, p153. Sivan, J.P.: 1974, Astron. and Astrophys. Suppl., 16, p163.CrossRefGoogle Scholar
10. Hart, L., and Davies, R.D.: 1982, Nature, 297, p191.CrossRefGoogle Scholar
11. See Boughn, , et al., ref. 3, for a definition of the Q's.Google Scholar
12. Mather, J.: 1980, Physica Scripta, 21, p671.CrossRefGoogle Scholar