The Disc Contribution to Rotation Curves of Spiral Galaxies

Details The Disc Contribution to Rotation Curves of Spiral Galaxies The Disc Contribution to Rotation Curves of Spiral Galaxies

Nov 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990mnras.247..349p&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Vol. 247, NO.2/NOV15, P. 349, 1990

Astronomy and Astrophysics

Astronomy

22

Scientific paper

We formulate analytically the maximum disc hypothesis (MDH) in the framework of a disc/halo mass decomposition, and apply it to a sample of suitably selected optical rotation curves. We find that the resulting disc-to-total mass ratios show a definite trend of increasing dark-to-luminous mass ratio with decreasing luminosity, in very good agreement with our previous results obtained by means of different decomposition techniques (Persic & Salucci). The same trend is also clearly discernible when the mass ratios (at the same radius in disc length-scale units) obtained from published MDH models are correlated with luminosity. We discuss possible reasons why previous studies which have assumed a similar framework have missed this fundamental systematics of dark matter.

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