Abstract
IN an important series of papers for the determination of the Hubble constant, Sandage and Tammann1–6 have concluded that the Universe is expanding in a remarkably uniform and isotropic way, with Hubble constant (H) 55±5 km s−1 Mpc−1. If true, this result is evidently crucial for all future cosmological models. As a consequence it should be tested and analysed in all possible ways. Their low H value is evidently based on their recalibration of the absolute magnitudes of the various luminosity classes of Sc-type galaxies based on two samples of nearby, and one sample of distant galaxies (Tables 3 and 4, ref. 5, and the Table, ref. 6).
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References
Sandage, A., and Tammann, G. A., Astrophys. J., 190, 525 (1974).
Sandage, A., and Tammann, G. A., ibid., 191, 603 (1974).
Sandage, A., and Tammann, G. A., ibid., 194, 223 (1974).
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Sandage, A., and Tammann, G. A., ibid., 196, 313 (1975).
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Rubin, V. A., Ford, K., and Rubin, J., Astrophys. J. Lett., 183, L111 (1973).
Jaakkola, T., Karoji, H., Moles, M., and Vigier, J. P., Nature, 256, 24 (1975).
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DENMAT, G., MOLES, M., VIGIER, J. et al. Possible local variation of the Hubble constant in van den Bergh's calibration of Sc-type galaxies. Nature 257, 773–774 (1975). https://doi.org/10.1038/257773a0
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DOI: https://doi.org/10.1038/257773a0
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