Chemichal enrichment study of infalling elliptical galaxy NGC 4552
Abstract
Hot, X-ray emitting atmospheres pervading galaxy clusters, groups and galaxies are enriched with metals. Chemical enrichment of these halos have been studied the most in clusters, revealing to be remarkably uniform in spatial distribution and chemical composition. The case of lower mass systems, however, is still widely debated because their elemental abundance have been less investigated so far. Here we present the metal content of NGC 4552, an elliptical galaxy infalling toward the Virgo cluster, hosting AGN feedback activity. It shows an X-ray trail due to the ram-pressure stripping of its hot atmosphere during its voyage. We take advantage of a deep XMM-Newton observation of this galaxy in order to study its chemical enrichment for the first time. In addition to a detailed investigation of its core (with EPIC and RGS data), we discuss its spatial distribution of Fe, Si, and Mg abundances, as well as its chemical composition (via its Mg/Fe and S/Fe ratios); and we interpret these novel results in the context of the current cluster enrichment paradigm.
- Publication:
-
44th COSPAR Scientific Assembly. Held 16-24 July
- Pub Date:
- July 2022
- Bibcode:
- 2022cosp...44.2331K