Leo A - Color-magnitude diagram of its brightest stars

Details Leo A - Color-magnitude diagram of its brightest stars Leo A - Color-magnitude diagram of its brightest stars

Aug 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984aj.....89.1160d&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 89, Aug. 1984, p. 1160-1165. Research supported by the National Research Council, Na

Astronomy and Astrophysics

Astronomy

21

Color-Magnitude Diagram, Dwarf Galaxies, Stellar Color, Stellar Magnitude, Astronomical Photometry, Blue Stars

Scientific paper

The authors present the color-magnitude diagram for the bright stars of the dwarf irregular galaxy Leo A. Plates obtained with the CFH telescope were measured with the APM system at Cambridge. No secondary images are used for the faint-magnitude calibration. Leo A has a population of bright blue stars but no bright red supergiants at the same magnitude level are present. A distance of 2.3 Mpc (μ0 = 26.8) is determined from the apparent magnitude of its brightest blue stars. Leo A with Mv = -14.4 has the same brightness as Sextans A. Leo A is, however, bluer. Very recent star formation could explain the morphology of its color-magnitude diagram.

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