The faint outskirts of the blue compact galaxy Haro 11: is there a red excess?
Article first published online: 14 APR 2010
© 2010 The Authors. Journal compilation © 2010 RAS
Monthly Notices of the Royal Astronomical Society
Volume 405, Issue 2, pages 1203–1211, June 2010
How to Cite
Micheva, G., Zackrisson, E., Östlin, G., Bergvall, N. and Pursimo, T. (2010), The faint outskirts of the blue compact galaxy Haro 11: is there a red excess?. Monthly Notices of the Royal Astronomical Society, 405: 1203–1211. doi: 10.1111/j.1365-2966.2010.16525.x
- Issue published online: 11 JUN 2010
- Article first published online: 14 APR 2010
- Accepted 2010 February 12. Received 2010 February 12; in original form 2009 August 17
- Galaxy: stellar content;
- galaxies: dwarf;
- galaxies: photometry;
- galaxies: haloes;
- galaxies: individual: Haro 11
Previous studies of the low surface brightness host of the blue compact galaxy (BCG) Haro 11 have suggested an abnormally red colour of V−K= 4.2 ± 0.8 for the host galaxy. This colour is inconsistent with any normal stellar population over a wide range of stellar metallicities (Z= 0.001–0.02). Similar though less extreme host colours have been measured for other BCGs and may be reconciled with population synthesis models, provided that the stellar metallicity of the host is higher than that of the ionized gas in the central starburst. We present the deepest V- and K-band observations to date of Haro 11 and derive a new V−K colour for the host galaxy. Our new data suggest a far less extreme colour of V−K= 2.3 ± 0.2, which is perfectly consistent with the expectations for an old host galaxy with the same metallicty as that derived from nebular emission lines in the star-forming centre.