Daftar Isi: The Southern Stellar Stream Spectroscopic Survey

Daftar Isi:

The Southern Stellar Stream Spectroscopic Survey (S5) is an ongoing international collaboration to map the newly discovered stellar streams of the Milky Way halo with the fiber-fed AAOmega spectrograph on the Anglo-Australian Telescope (AAT). S5 is the first systematic program pursuing a complete census of known streams in the Southern Sky, providing a uniquely powerful sample for understanding the building blocks of the Milky Way's stellar halo, the progenitors and formation of stellar streams, the mass and shape of the Milky Way's halo, and ultimately the nature of dark matter. The survey started in Summer 2018 and has mapped ~20 streams with over 50 nights on AAT, collecting around ~ 100k stellar spectra. Some of the key results include the detection that the ATLAS stream and Aliqa Uma streams are likely one stream that has been perturbed by Sagittarius, detection of the fastest hypervelocity star S5-HVS1, the detection of the lowest metallicity stellar stream and the characterization of chemical abundances of individual streams. In this talk I will review some of the recent results from the survey, including the recent data release.