Simulations of Galactic Winds and Starbursts in Galaxy Clusters
- Autor(en)
- Wolfgang Kapferer, Wilfried Domainko, Martin Mair, Sabine Schindler, Eelco van Kampen, Thomas Kronberger, Stefan Kimeswenger, Maximilian Ruffert, Dieter Breitschwerdt
- Abstrakt
We find that • there is a difference between the strength of the enrichment by galactic winds and starbursts in merging and in non-merging model clusters. Merging systems show more galaxy-galaxy interactions, which cause more starbursts. On the other hand galactic winds can be suppressed by the pressure of the ICM onto the galaxies in relaxed clusters. • especially the metal maps can help to distinguish between the pre- or post merger state of a galaxy cluster. Pre-mergers have a metallicity gap between the subclusters, post-mergers have a high metallicity between subclusters. In Fig. 1 a model cluster in the pre-merger phase is shown. The isolines indicate the galaxy density and the colours show the metallicity of the ICM. The metallicity gap in the pre-merger phase is clearly visible. • the inhomogeneities which are introduced by galactic winds and starbursts into the ICM can survive for a long time. In the outskirts of a galaxy cluster, where the variation in the density and the velocity field of the ICM is less than in the inner parts, we find that inhomogeneities can survive up to several Gyr. • metal enrichment of the ICM by galactic winds before z=1 is not as strong as after z=1 in the cluster centre ((5 Mpc)3h-1 volume), whereas for merger-driven starbursts there is no noticeable difference.
- Organisation(en)
- Institut für Astrophysik
- Externe Organisation(en)
- Leopold-Franzens-Universität Innsbruck, University of Edinburgh
- Seiten
- 323-325
- DOI
- https://doi.org/10.1007/978-3-540-74713-0_74
- Publikationsdatum
- 2008
- ÖFOS 2012
- 103004 Astrophysik, 103003 Astronomie
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/ac44a0c2-6eb4-4140-8ad7-be4be4ac3198