Daftar Isi: The Fimbulthul stellar stream was tidally stripped from the globular cluster ω Centauri

Daftar Isi:

The Milky Way Galaxy formed in part through the accretion of smaller dwarf galaxies. Some of these events remain imprinted on the Galaxy in the form of stellar tidal streams: coherent kinematic and spatial structures of stars. The discovery of these streams has exploded recently thanks to deep photometric surveys (e.g., DES, Pan-STARRS) combined with the precise kinematic information from Gaia. One particular stream, Fimbulthul, has associated with the massive globular cluster ω Centauri[1, 2], but only with kinematics and metallicities. In this talk, I will use the abundance information from the GALAH survey to confirm this association of the Fimbulthul stellar stream to ω~Centauri using chemical tagging from over 10 elements with a range of dominant nucleosynthetic origins. References [1] Ibata, R. A., Malhan, K., & Martin, N. F. (2019). The Streams of the Gaping Abyss: A Population of Entangled Stellar Streams Surrounding the Inner Galaxy. The Astrophysical Journal, 872(2), 152. https://doi.org/10.3847/1538-4357/ab0080 [1] Ibata, R. A., Bellazzini, M., Malhan, K., Martin, N., & Bianchini, P. (2019). Identification of the long stellar stream of the prototypical massive globular cluster ω Centauri. Nature Astronomy, 1–27. https://doi.org/10.1038/s41550-019-0751-x