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The Anisotropy in the distribution of Extragalactic Infrared Sources and Background

Published online by Cambridge University Press:  03 August 2017

P. de Bernardis ,
R. Fabbri ,
S. Masi ,
F. Melchiorri ,
B. Olivo  and
W. Pecorella
P. de Bernardis
Affiliation:
Dipartimento di Fisica, Università “La Sapienza”, Roma, Italy
R. Fabbri
Affiliation:
Dipartimento di Fisica, Università degli studi, Firenze, Italy
S. Masi
Affiliation:
Dipartimento di Fisica, Università “La Sapienza”, Roma, Italy
F. Melchiorri
Affiliation:
Dipartimento di Fisica, Università “La Sapienza”, Roma, Italy
B. Olivo
Affiliation:
IFA-CNR, Roma, Italy
W. Pecorella
Affiliation:
Dipartimento di Fisica, Università “La Sapienza”, Roma, Italy

Abstract

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We analyze the anisotropies in the extragalactic infrared background and in the source counts in standard cosmology perturbed by large-scale, small-amplitude density fluctuations. The dipole anisotropy of the diffuse background is connected to the dipole of the cosmic background radiation and of the source counts, and a full consistency with a large (≃ 7%) anisotropy in the IRAS source counts is found to imply a low density (Ω0 ≃ 0.2) universe, contrary to a previous claim. We analyze also higher order harmonics. Using the IRAS Low-Resolution All-Sky Maps we obtain an upper limit of 0.17MJy/sr on the dipole of the 100 μm background and show that it is consistent with a source-count anisotropy of 7% only for a low intensity, I ≤ 1.2 M Jy/sr, of the background itself.

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 130: Large Scale Structures of the Universe , 1988 , pp. 15 - 23
Copyright
Copyright © Reidel 1988 

References

Aaronson, M., Bothun, G., Mould, J., Huchra, J., Schomner, R.A., Cornell, M.E., 1986, Ap.J., 302, 536 Google Scholar
Bond, J.R., Carr, B.J., Hogan, C.J. 1986, Ap.J., 306, 428 CrossRefGoogle Scholar
Burnstein, D., Davies, R.L., Dressler, A., Faber, S., Lynden-Bell, D., Terlevich, R., Wegner, G., 1986, Proc.Hawaii Conference on the Peculiar Velocity Field of the Universe, in press Google Scholar
Collins, A., Joseph, R.D., Robertson, N.A. 1986, Nature, 320, 506 Google Scholar
de Bernardis, P., Masi, S., Melchiorri, B., Melchiorri, F., Moreno, G., 1984, Ap.J., 278, 150 CrossRefGoogle Scholar
de Bernardis, P., Masi, S., Melchiorri, F., Moreno, G., Vannoni, R., Aiello, S. 1987, submitted to Ap.J. Google Scholar
Ennis, D.J., Neugebauer, G., 1982, Ap.J., 267, 460 Google Scholar
Fabbri, R., Lucchin, F., Matarrese, S., 1987, Ap.J., 315, 1.CrossRefGoogle Scholar
Fabbri, R., Andreani, P., Nisini, B., Melchiorri, F., 1987a, Ap.J., 315, 12 Google Scholar
Fabbri, R., de Bernardis, P., Masi, S., Melchiorri, F., 1987b, in preparation Google Scholar
Fabbri, R., Guidi, I., Melchiorri, F., Natale, V., 1980, Phys.Rev.Lett., 44, 1563 Google Scholar
IRAS Explanatory Supplement 1984, (Beichman, C.A., Neugebauer, G., Habing, H.J., Clegg, P.E., Chester, T.J., eds.) JPL Publ. D-1855 Google Scholar
Lawrence, A., Walker, D., Rowan-Robinson, M., Leech, K.J., Penston, M.V. 1986, MNRAS, 687 Google Scholar
Lifshitz, E.M., Khalatnikov, I.M. 1963, Adv.Phys., 12, 185.Google Scholar
Low, F.J., Tucker, W.H., 1968, Phys.Rev.Lett., 21, 1538 Google Scholar
Lubin, P., Villela, T., Epstein, G., Smoot, G. 1985, Ap.J.(Letters), 298, L1.Google Scholar
Meiksin, A., Davis, M. 1986, Astron.J., 91, 191.Google Scholar
Peterson, C.J. and Baumgart, C.W., Astron.J., 91, 530.CrossRefGoogle Scholar
Rowan-Robinson, M. 1986, MNRAS, 219, 737.CrossRefGoogle Scholar
Rubin, V.C., Ford, W.K. Jr., Thonnard, N., Roberts, M.S., Graham, J.A. 1976, Astron.J., 81, 687 CrossRefGoogle Scholar
Seldner, M., Sievers, B., Groth, E.J. 1977, Astron.J., 82, 249 Google Scholar
Shane, C.D., Wirtanen, C.A. 1967, Publ.Lick.Obs., XXII, pt.1.Google Scholar
Silk, J., Wilson, M.L. 1985, Proc. of the Int. School of Phys. Fermi, E., Melchiorri, F. and Ruffini, R. eds., LXXXVI, 431.Google Scholar
Tinsley, B.M. 1973, Astron.Astrophys., 266, L79 Google Scholar
Yahil, A., Walker, D., Rowan-Robinson, M. 1986, Ap.J.(Letters), 301, L1.CrossRefGoogle Scholar