Light, gravity and galaxy streaming

Details Light, gravity and galaxy streaming Light, gravity and galaxy streaming

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987qjras..28..187l&link_type=abstract

Royal Astronomical Society, Quarterly Journal (ISSN 0035-8738), vol. 28, Sept. 1987, p. 187-196.

Astronomy and Astrophysics

Astronomy

20

Astronomical Models, Elliptical Galaxies, Relic Radiation, Spiral Galaxies, Far Fields, Galactic Clusters, Hubble Constant, Mass Distribution

Scientific paper

A bulk streaming motion of elliptical and spiral galaxies over and above the Hubble expansion gives a much better fit to the observations than pure Hubble flow. However, the fit shows significant quadrupolar residuals and varies with distance. The accuracy with which a motion of the Sun fits the observed anisotropy of the Cosmic Microwave Background (CMB) is much better. A model in which the bulk flow of galaxies is replaced by the flow generated by a spherical mass concentration centred on l = 307, b = 9, Rm = 4350 km s-1 gives an even better fit if its gravity is sufficient to generate an inflow of Vm = 570±60 km s-1 at the Sun.

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