Distances to Nearby Galaxies in Sculptor
Abstract
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.
Keywords
Cite
@article{arxiv.astro-ph/0302045,
title = {Distances to Nearby Galaxies in Sculptor},
author = {I. D. Karachentsev and E. K. Grebel and M. E. Sharina and A. E. Dolphin and D. Geisler and P. Guhathakurta and P. W. Hodge and V. E. Karachentseva and A. Sarajedini and P. Seitzer},
journal= {arXiv preprint arXiv:astro-ph/0302045},
year = {2011}
}
Comments
20 pages, 6 figures, A&A accepted. Figure 2 (5444k) is available at http://luna.sao.ru/~sme/fig2Sculptor.tar.gz