No evidence for natural bias in elliptical galaxies

Details No evidence for natural bias in elliptical galaxies No evidence for natural bias in elliptical galaxies

Apr 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990mnras.243..517p&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 243, April 1, 1990, p. 517-521.

Mathematics

Probability

4

Cosmology, Dark Matter, Elliptical Galaxies, Gravitational Collapse, Baryons, Galactic Bulge, Galactic Structure, Mass To Light Ratios, Probability Distribution Functions, Red Shift

Scientific paper

This paper discusses the relations between luminosity, size, and velocity dispersion for elliptical galaxies (the Faber-Jackson and D(n)-delta(v) relations) in terms of models for autonomously biased gravitational collapse. For an unbiased model, the scatter in the Faber-Jackson relation can be understood quantitatively in terms of the dispersion in collapse redshifts for galaxy-scale density maxima. However, if there is a high degree of bias, it is hard to account for the equation of the fundamental plane for ellipticals and for the locus of points on that plane. To achieve this, the factor by which baryonic material has collapsed relative to the dark matter must be epoch dependent, with dissipation being more effective at low redshift.

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