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NGC 4472 AND THE HUBBLE DIAGRAM
MARC AARONSON and JEREMY MOULD
Publications of the Astronomical Society of the Pacific
Vol. 93, No. 551 (February 1981), pp. 20-24
Published by: Astronomical Society of the Pacific
Stable URL: http://www.jstor.org/stable/40677821
Page Count: 5
You can always find the topics here!Topics: Hubble diagram, Galaxies, Red shift, Diameters, Astronomical photometry, Giant elliptical galaxies, Stars, Astronomical magnitude, Observational astronomy, Apparent magnitude
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Newly obtained large-aperture photoelectric BV photometry of NGC 4472 (and NGC 4486) has confirmed the accuracy of Holmberg's photographic magnitudes. The new data are used to rediscuss the problem of NGC 4472 and the noncosmological component of the Virgo redshift (Δv), using five separate Hubble diagrams. For Δv < 300 km s⁻¹, the location of NGC 4472 lies well within the magnitude range defined by more distant giant ellipticals. If Au is as great as 500 km s⁻¹, then NGC 4472 is 0.47-0.75 mag brighter than the mean of other first-ranked galaxies. However, the significance of this deviation ranges from 2.7 σ to only 1.4 σ, depending on the choice of Hubble diagram.
Publications of the Astronomical Society of the Pacific © 1981 The University of Chicago Press