Limits on isocurvature fluctuations from Boomerang and MAXIMA

Kari Enqvist; Hannu Kurki-Suonio; Jussi Väliviita

doi:10.1103/PhysRevD.62.103003

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Limits on isocurvature fluctuations from Boomerang and MAXIMA

Kari Enqvist^*

Hannu Kurki-Suonio^†

Jussi Väliviita^‡

Department of Physics, University of Helsinki, and Helsinki Institute of Physics, P.O. Box 9, FIN-00014 University of Helsinki, Finland

Helsinki Institute of Physics, P.O. Box 9, FIN-00014 University of Helsinki, Finland

Department of Physics, University of Helsinki, P.O. Box 9, FIN-00014 University of Helsinki, Finland

^*Electronic address: Kari.Enqvist@helsinki.fi
^†Electronic address: Hannu.Kurki-Suonio@helsinki.fi
^‡Electronic address: Jussi.Valiviita@helsinki.fi

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Phys. Rev. D 62, 103003 – Published 6 October, 2000

DOI: https://doi.org/10.1103/PhysRevD.62.103003

Abstract

We present the constraints on isocurvature fluctuations for a flat universe implied by the Boomerang and MAXIMA-1 data on the anisotropy of the cosmic microwave background. Because the new data defines the shape of the angular power spectrum in the region of the first acoustic peaks much more clearly than earlier data, even a tilted pure isocurvature model is now ruled out. However, a mixed model with a sizable isocurvature contribution remains allowed. We consider primordial fluctuations with different spectral indices for the adiabatic and isocurvature perturbations, and find that the 95% C.L. upper limit to the isocurvature contribution to the low multipoles is $α <~ 0.63.$ The upper limit to the contribution in the $l \sim 200$ region is $α_{200} <~ 0.13.$

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[c1] P. de Bernardis et al., Nature (London) 404, 955 (2000).

[c2] S. Hanany et al., astro-ph/0005123.

[c3] A. Balbi et al., astro-ph/0005124.

[c4] map.gsfc.nasa.gov/.

[c5] astro.estec.esa.nl/Planck/.

[c6] G. Efstathiou and J. R. Bond, Mon. Not. R. Astron. Soc. 218, 103 (1986).

[c7] M. Bucher, K. Moodley, and N. Turok, Phys. Rev. D 62, 083508 (2000).

[c8] I. A. Affleck and M. Dine, Nucl. Phys. B249, 361 (1985).

[c9] K. Enqvist and J. McDonald, Phys. Rev. Lett. 83, 2510 (1999).

[c10] A. Kusenko and M. Shaposhnikov, Phys. Lett. B 418, 104 (1998); ibid.K. Enqvist and J. McDonald, 425, 309 (1998).

[c11] K. Enqvist and J. McDonald, Nucl. Phys. B538, 321 (1999).

[c12] M. Kawasaki, N. Sugiyama, and T. Yanagida, Phys. Rev. D 54, 2442 (1996); T. Kanazawa, M. Kawasaki, N. Sugiyama, and T. Yanagida, Prog. Theor. Phys. 102, 71 (1999).

[c13] A. D. Linde, Phys. Lett. 158B, 375 (1985); L. A. Kofman and A. D. Linde, Nucl. Phys. B282, 555 (1987); D. Langlois, Phys. Rev. D 59, 123512 (1999).

[c14] R. Stompor, A. J. Banday, and K. M. Górski, Astrophys. J. 463, 8 (1996).

[c15] C. L. Bennett et al., Astrophys. J. Lett. 464, L1 (1996); M. Tegmark, Phys. Rev. D 55, 5895 (1997).

[c16] E. F. Bunn and M. White, Astrophys. J. 480, 6 (1997).

[c17] P. J. E. Peebles, Astrophys. J. 510, 523 (1999).

[c18] P. J. E. Peebles, Astrophys. J. 510, 531 (1999).

[c19] K. Enqvist and H. Kurki-Suonio, Phys. Rev. D 61, 043002 (2000).

[c20] E. Pierpaoli, J. Garcia-Bellido, and S. Borgani, J. High Energy Phys. 10, 015 (1999).

[c21] S. Dodelson, W. H. Kinney, and E. W. Kolb, Phys. Rev. D 56, 3207 (1997).

[c22] D. H. Lyth and A. Riotto, Phys. Rep. 314, 1 (1999).

[c23] V. F. Mukhanov, H. A. Feldman, and R. H. Brandenberger, Phys. Rep. 215, 203 (1992).

[c24] A. R. Liddle and D. H. Lyth, Phys. Rep. 231, 1 (1993).

[c25] www.sns.ias.edu/ $\sim$ matiasz/CMBFAST/cmbfast.html; U. Seljak and M. Zaldarriaga, Astrophys. J. 469, 437 (1996).

[c26] M. Tegmark and M. Zaldarriaga, astro-ph/0002091.

[c27] A. E. Lange et al., astro-ph/0005004.

[c28] M. Tegmark and M. Zaldarriaga, Phys. Rev. Lett. 85, 2240 (2000).

[c29] K. A. Olive and D. N. Schramm, in C. Caso et al.Particle Data Group, , Eur. Phys. J. C 3, 1 (1998), p. 119; K. A. Olive, G. Steigman, and T. P. Walker, Phys. Rep. 333-334, 389 (2000); D. Tytler, J. M. O’Meara, N. Suzuki, and D. Lubin, astro-ph/0001318.

[c30] R. A. Malaney and G. J. Mathews, Phys. Rep. 229, 145 (1993); S. Sarkar, Rep. Prog. Phys. 59, 1493 (1996); H. Kurki-Suonio, astro-ph/0002071.

[c31] W. Hu and M. White, Phys. Rev. Lett. 77, 1687 (1996).

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