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The faint outskirts of the blue compact galaxy Haro 11: is there a red excess?
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Observational Astronomy.
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2010 (English)In: Monthly notices of the Royal Astronomical Society, ISSN 0035-8711, E-ISSN 1365-2966, Vol. 405, no 2, 1203-1211 p.Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2010. Vol. 405, no 2, 1203-1211 p.
Keyword [en]
Galaxy: stellar content, galaxies: dwarf, galaxies: photometry, galaxies: haloes, galaxies: individual: Haro 11
National Category
Astronomy, Astrophysics and Cosmology
URN: urn:nbn:se:uu:diva-135542DOI: 10.1111/j.1365-2966.2010.16525.xISI: 000278677800035OAI: oai:DiVA.org:uu-135542DiVA: diva2:377761
Available from: 2010-12-14 Created: 2010-12-07 Last updated: 2012-10-11Bibliographically approved

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Bergvall, Nils
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