Red halos and extragalactic background light
2010 (English)In: Cosmic Radiation Fields: Sources in the early Universe: proceedings of CRF2010, DESY Hamburg, Nov 9-12 2010 / [ed] Martin Raue (chair), Tanja Kneiske, Dieter Horns, Dominik Elsaesser, and Peter Hauschildt, 2010, 14- p.Conference paper (Other academic)
Deep surface photometry of disk galaxies at optical and near-IR wavelengths have revealed faint halos with colours much too red to be reconciled with the resolved stellar populations detected in the halos of the Milky Way or M31. Alternative scenarios involving high metallicities, nebular emission or large amounts of dust in these halos are also disfavoured. Here, we argue that extinction of the optical extragalactic background light in the halos of these galaxies may possibly be responsible for the reported colour anomalies. We also discuss how an independent measurement of the optical extragalactic background light might be accomplished by combining direct star counts with surface photometry for a single nearby galaxy.
Place, publisher, year, edition, pages
2010. 14- p.
Astronomy, Astrophysics and Cosmology
IdentifiersURN: urn:nbn:se:su:diva-71294OAI: oai:DiVA.org:su-71294DiVA: diva2:484485
CRF2010, DESY Hamburg, Nov 9-12 2010