Missing mass in collisional debris from galaxies
Metadata
Show full item recordAuthor
Bournaud, F.; Duc, P.-A.; Brinks, E.; Boquien, Mérédic; Amram, Philippe; Lisenfeld , Ute; Koribalski, B. S.; Walter, F.; Charmandaris, V.Editorial
American Association for the Advancement of Science
Materia
Galaxies Dwarf Mass function
Date
2007Referencia bibliográfica
Bournaud, F.; et al. Missing mass in collisional debris from galaxies. Science Magazine, 316(5828): 1166-1169 (2007). [http://hdl.handle.net/10481/28401]
Abstract
Recycled dwarf galaxies can form in the collisional debris of massive galaxies. Theoretical models predict that, contrary to classical galaxies, they should be free of non-baryonic Dark Matter. Analyzing the observed gas kinematics of such recycled galaxies with the help of a numerical model, we demonstrate that they do contain a massive dark component amounting to about twice the visible matter. Staying within the standard cosmological framework, this result most likely indicates the presence of large amounts of unseen, presumably cold, molecular gas. This additional mass should be present in the disks of their progenitor spiral galaxies, accounting for a significant part of the so-called missing baryons.