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For refcode 1992A&A...255...63J:
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Copyright by European Southern Observatory (ESO). Reproduced by permission
1992A&A...255...63J Dark-to-luminous mass ratio in spiral galaxies J. Jablonka and N. Arimoto DAEC, Observatoire de Paris, Section de Meudon, F-92195 Cedex, France Physics Department, University of Durham, South Road, Durham DH1 3LE, UK Received April 3, accepted May 16, 1991 Abstract. We have calculated the mass-to-light ratios of spiral galaxies in the blue band and the H-band by using a chemical and photometric evolution model with a two-component bulge-disc system. The slopes of the theoretical M/L_b_ vs. (B-V) and M/L_h_ vs. (B - H) relations are much smaller than those of Larson & Tinsley (1978), which were adopted in previous studies. The model predictions agree with the data of Rubin et al. (1982,1985) and Burstein et al. (1982); the masses referred to are those within a radius corresponding to the isophotal level of surface brightness at 25-th B mag arcsec. We find no evidence which supports the previous claims that bluer galaxies have relatively more massive dark halos. We conclude that the ratio of dark-to-luminous mass is uniform among spiral galaxies, contrary to the conventional view. Key words: mass-to-light ratio - dark matter - Hubble sequence - spiral galaxies
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