Zhen Yuan

The Global Dynamical Atlas of the Milky Way Mergers: Constraints from Gaia EDR3–based Orbits of Globular Clusters, Stellar Streams, and Satellite Galaxies

Khyati Malhan, Rodrigo Ibata, Sanjib Sharma et al. · The Astrophysical Journal · 2022 · 158 citations · Full text

Stellar streams produced from dwarf galaxies provide direct evidence of the hierarchical formation of the Milky Way. Here, we present the first comprehensive study of the LMS-1 stellar stream, that we detect by searching for wide streams in the Gaia EDR3 data set using the STREAMFINDER algorithm. This stream was recently discovered by Yuan et al. We detect LMS-1 as a 60° long stream to the north of the galactic bulge, at a distance of ~20 kpc from the Sun, together with additional components that suggest that the overall stream is completely wrapped around the inner Galaxy. Using spectroscopic measurements from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope, the Sloan Digital Sky Survey, and the Apache Point Observatory Galactic Evolution Experiment, we infer that the stream is very metal-poor (⟨[Fe/H]⟩ = -2.1) with a significant metallicity dispersion (σ[Fe/H] = 0.4), and it possesses a large radial velocity dispersion (σv = 20 ± 4 km s-1). These estimates together imply that LMS-1 is a dwarf galaxy stream. The orbit of LMS-1 is close to polar, with an inclination of 75° to the galactic plane. Both the orbit and metallicity of LMS-1 are remarkably similar to the globular clusters NGC 5053, NGC 5024, and the stellar stream Indus. These findings make LMS-1 an important contributor to the stellar population of the inner Milky Way halo.

Khyati Malhan, Zhen Yuan, Rodrigo Ibata et al. · HAL (Le Centre pour la Communication Scientifique Directe) · 2021 · 56 citations · Full text

Charting the Galactic Acceleration Field. II. A Global Mass Model of the Milky Way from the STREAMFINDER Atlas of Stellar Streams Detected in Gaia DR3

Rodrigo Ibata, Khyati Malhan, Wassim Tenachi et al. · The Astrophysical Journal · 2024 · 50 citations · Full text

Enhanced osteointegration of orthopaedic implant gradient coating composed of bioactive glass and nanohydroxyapatite

Xinhui Xie, Xiaowei Yu, Shao-xian Zeng et al. · Journal of Materials Science Materials in Medicine · 2010 · 48 citations

Materials Science, Tissue Engineering, Orthopaedic Biomaterials +13

The <i>Pristine</i> survey – XVI. The metallicity of 26 stellar streams around the Milky Way detected with the <tt>STREAMFINDER</tt> in <i>Gaia</i> EDR3

Nicolas F. Martin, Rodrigo Ibata, Else Starkenburg et al. · Monthly Notices of the Royal Astronomical Society · 2022 · 38 citations · Full text