The Stellar Content of NGC 6789, A Blue Compact Dwarf Galaxy in the Local Void
Astrophysics
2009-11-06 v1
Abstract
We find that NGC6789 is the most nearby example of a Blue Compact Dwarf galaxy known to date. With the help of WFPC2 aboard the Hubble Space Telescope, we resolve NGC6789 into over 15,000 point sources in the V and I bands. The young stars of NGC6789 are found exclusively near the center of the galaxy. The red giant population identified at large galacticentric radii yields a distance of about 3.6 Mpc, a stellar metallicity [Fe/H] of about -2, and a minimum age of about 1 Gyr. Despite its isolated location in the Local Void,its low metallicity, and its active star formation, the properties of NGC6789 are clearly not those of a galaxy in formation.
Keywords
Cite
@article{arxiv.astro-ph/0102452,
title = {The Stellar Content of NGC 6789, A Blue Compact Dwarf Galaxy in the Local Void},
author = {Igor O. Drozdovsky and Regina E. Schulte-Ladbeck and Ulrich Hopp and Mary M. Crone and Laura Greggio},
journal= {arXiv preprint arXiv:astro-ph/0102452},
year = {2009}
}
Comments
8 pages, 4 figures, ApJL Accepted