Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987mnras.224..935w&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 224, Feb. 15, 1987, p. 935-944.
Astronomy and Astrophysics
Astronomy
18
Charge Coupled Devices, Dwarf Galaxies, Irregular Galaxies, Stellar Magnitude, Stellar Spectrophotometry, Visual Photometry, A Stars, Color-Magnitude Diagram, Variable Stars
Scientific paper
Based on B and V CCD photometry of Sextans A to limits V = 22, B = 23.5, systematic errors are found in the B and V photometry of Sandage and Carlson (1985) (SC) and that of Hoessel, Schommer and Danielson (1983). The mean absolute V magnitudes of the three brightest red and blue stars are found to be -7.6 and -7.4, respectively; the corresponding B magnitudes are -5.8 and -7.4. A new Cepheid distance modulus for Sextans A of 26 + or - 0.4 mag is proposed. Results suggest that the SC results for the Sextans A Cepheids and supergiants place these stars too faint in B by about 0.2 mag.
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