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Tip of the red giant branch distance for the Sculptor group dwarf ESO 540-032
2001
Astronomy and Astrophysics
We present the first VI CCD photometry for the Sculptor group galaxy ESO 540-032 obtained at the Very Large Telescope UT1+FORS1. The (I, V-I) colour-magnitude diagram indicates that this intermediate-type dwarf galaxy is dominated by old, metal-poor ([Fe/H]~-1.7 dex) stars, with a small population of slightly more metal-rich ([Fe/H]~-1.3 dex), young (age 150-500 Myr) stars. A discontinuity in the I-band luminosity function is detected at I_0 = 23.44 \pm 0.09 mag. Interpreting this feature as
doi:10.1051/0004-6361:20010389
fatcat:zfqgg43i6zd3tdpseqqdozq7wq