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The faint outskirts of the blue compact galaxy Haro 11 : is there a red excess?
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- Micheva, Genoveva (author)
- Stockholms universitet,Institutionen för astronomi
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- Zackrisson, Erik (author)
- Stockholms universitet,Institutionen för astronomi
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- Östlin, Göran (author)
- Stockholms universitet,Institutionen för astronomi
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- Pursimo, Tapio (author)
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- (creator_code:org_t)
- Oxford University Press (OUP), 2010
- 2010
- English.
- In: Monthly notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 405:2, s. 1203-1211
- Journal article (peer-reviewed)
Abstract
Subject headings
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- 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.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- stellar content
- dwarf
- photometry
- haloes
- Haro 11
- Astronomy
- Astronomi
- Astronomy and astrophysics
- Astronomi och astrofysik
- Astronomy
- astronomi
Publication and Content Type
- ref (subject category)
- art (subject category)
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