3 papers
astro-ph.GA2026
Disentangling the Morphology of Palomar~5: Effects of the Bar, Spiral Arms, LMC, and Halo Flattening
Zhenghao He, Long Wang, Zi-yi Zhou +2
The Palomar~5 (Pal~5) globular cluster and its tidal tails provide a sensitive probe of globular-cluster evolution in the time-dependent Milky Way potential. We study the past 3~Gy…
astro-ph.GA2026
Constraining the Galactic bar and spiral pattern speeds with the Hyades tidal stream
Zi-yi Zhou, Long Wang, Tereza Jerabkova +1
We present a suite of direct -body simulations of the Hyades open cluster and its tidal stream in a Milky Way potential that includes a rotating bar and spiral arms. Using the h…
astro-ph.HE2025
QPOs in a highly magnetized ultra-compact X-ray binary 4U 1626-67
Zi-Yi Zhou, Long Ji, Ling-Da Kong +3
We report the detection of mHz quasi-periodic oscillations (QPOs) in four NuSTAR observations of 4U 1626-67 during its recent spin-down episode. By using a novel method based on th…