Chemical enrichment of isolated relic galaxy Mrk1216
Publications of the Astronomical Society of Australia, cilt.42, 2025 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 42
- Basım Tarihi: 2025
- Doi Numarası: 10.1017/pasa.2025.10098
- Dergi Adı: Publications of the Astronomical Society of Australia
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier
- Anahtar Kelimeler: galaxies: evolution, galaxies: formation, galaxies: individual: mrk1216, galaxies: ISM, ISM: abundances, X-rays: ISM
- Yıldız Teknik Üniversitesi Adresli: Evet
Özet
In this study, we investigate the chemical enrichment and structural evolution of the isolated elliptical relic galaxy Mrk1216 through X-ray observations. As a red-nugget relic, Mrk1216 provides a rare window into the early Universe, owing to its minimal interaction with the surrounding environment. Using data from the XMM-Newton telescope, we model the X-ray emission of its interstellar medium to derive radial temperature and abundance profiles. We find that the central region exhibits an elevated [Mg/Fe] ratio compared to typical early-type galaxies, consistent with a brief but intense star formation episode during its early assembly - a hallmark of relic systems. The nearly flat SNIa ratio profile (RIa ~0.17) extending to ~0.42R500 supports an early-enrichment scenario. These results highlight the importance of relic galaxies as benchmarks for studying early galaxy evolution and chemical enrichment. Future high-resolution missions and more advanced theoretical models incorporating more realistic initial mass functions are needed to fully assess their implications.