Distances to Nearby Galaxies in Sculptor

Details Distances to Nearby Galaxies in Sculptor Distances to Nearby Galaxies in Sculptor

2003-02-04

arxiv.org/abs/astro-ph/0302045v1

Astron.Astrophys.404:93-112,2003

Astronomy and Astrophysics

Astrophysics

20 pages, 6 figures, A&A accepted. Figure 2 (5444k) is available at http://luna.sao.ru/~sme/fig2Sculptor.tar.gz

Scientific paper

10.1051/0004-6361:20030170

We present an analysis of Hubble Space Telescope/WFPC2 images of nine nearby galaxies in Sculptor. We derive their distances from the luminosity of the tip of the red giant branch stars with a typical accuracy of ~ 12%. Their distances are 4.21 Mpc (Sc22), 4.92 Mpc (DDO226), 3.94 Mpc (NGC253), 3.40 Mpc (KDG2), 3.34 Mpc (DDO6), 3.42 Mpc (ESO540-030), 4.43 Mpc (ESO245-05), 4.27 Mpc (UGCA442), and 3.91 Mpc (NGC7793). The galaxies are concentrated in several spatially separated loose groups around NGC300, NGC253, and NGC7793. The Sculptor galaxy complex together with the CVn I cloud and the Local Group form a 10 Mpc amorphous filament, apparently driven by the free Hubble flow.

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