Journal Article

Large-Scale Coherent Dipole Anisotropy?

S. Basilakos and M. Plionis

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 299, issue 3, pages 637-642
Published in print September 1998 | ISSN: 0035-8711
Published online September 1998 | e-ISSN: 1365-2966 | DOI:
Large-Scale Coherent Dipole Anisotropy?

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We have reanalysed and compared the dipoles of the 1.2-Jy and 0.6-Jy (QDOT) IRAS galaxy samples. We find strong indications from both samples for (a) significant contributions to the gravitational field that shapes the Local Group motion from depths up to ∼ 170 h−1 Mpc and (b) a large-scale coherence of the dipole anisotropy, indications provided mainly by the fact that the differential dipoles of large equal-volume shells are aligned with the CMB dipole and exhibit significant dipole signals. The two IRAS dipoles are indistinguishable within 50 h−1 Mpc and beyond ∼ 130 h−1 Mpc while the QDOT dipole, having a lower flux limit, continues growing with respect to the 1.2-Jy sample up to ∼ 100 h−1 Mpc in agreement with Rowan-Robinson et al.

Keywords: galaxies: distances and redshifts; cosmology: observations; large-scale structure of Universe; infrared: galaxies

Journal Article.  0 words. 

Subjects: Astronomy and Astrophysics

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