Fig. 7 from Hubble Space Telescope Observations of the Main Sequence of M4

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Hubble Space Telescope Observations of the Main Sequence of M4

Authors: H. B. Richer, G. G. Fahlman, J. Brewer, S. Davis, J. Kalirai, P. B. Stetson, B. M. S. Hansen, R. M. Rich, R. A. Ibata, B. K. Gibson, and M. Shara

Richer et al. 2004 The Astronomical Journal 127 2771.

Provider: AAS Journals

Caption: Fig. 7.

Histograms of the deviation of M4 stars (in magnitudes) from the main‐sequence fiducial. Small excesses are clearly seen toward negative residuals at about 0.75 mag in the inner two annuli, suggesting a photometric main‐sequence binary frequency of a few percent.

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