Sökning: onr:"swepub:oai:DiVA.org:uu-14437" >
The Red Halo Phenom...
The Red Halo Phenomenon
-
- Zackrisson, Erik (författare)
- Uppsala universitet,Institutionen för astronomi och rymdfysik
-
- Bergvall, Nils (författare)
- Uppsala universitet,Institutionen för astronomi och rymdfysik,galax
-
- Östlin, Göran (författare)
- Stockholms universitet,Institutionen för astronomi
-
visa fler...
-
- Micheva, Genoveva (författare)
- Stockholms universitet,Institutionen för astronomi
-
- Leksell, Maria (författare)
- Uppsala universitet,Institutionen för astronomi och rymdfysik
-
visa färre...
-
(creator_code:org_t)
- American Astronomical Society, 2006
- 2006
- Engelska.
-
Ingår i: Astrophysical Journal. - : American Astronomical Society. - 0004-637X .- 1538-4357. ; 650:2, s. 812-817
- Relaterad länk:
-
https://iopscience.i...
-
visa fler...
-
https://urn.kb.se/re...
-
https://doi.org/10.1...
-
https://urn.kb.se/re...
-
visa färre...
Abstract
Ämnesord
Stäng
- Optical and near-IR observations of the halos of disk galaxies and blue compact galaxies have revealed a very red spectral energy distribution that cannot easily be reconciled with a normal, metal-poor stellar population such as that in the stellar halo of the Milky Way. Here spectral evolutionary models are used to explore the consequences of these observations. We demonstrate that a stellar population of low to intermediate metallicity but with an extremely bottom-heavy initial mass function can explain the red halos around both types of objects. Other previously suggested explanations, such as nebular emission or very metal-rich stars, are shown to fail in this respect. This indicates that if the reported halo colors are correct, halo populations dominated by low-mass stars may be a phenomenon common to galaxies of very different Hubble types. Potential tests of this hypothesis are discussed, along with its implications for the baryonic dark matter content of galaxies.
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- Cosmology: Dark Matter
- Galaxies: Evolution
- Galaxies: Halos
- Galaxies: Stellar Content
- Physics
- Fysik
- Extragalactical astronomy
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas