Kavli Affiliate: Huawei Zhang
| First 5 Authors: Hao Wu, Haibo Yuan, Yilun Wang, Zexi Niu, Huawei Zhang
| Summary:
During the early merger of the Milky Way, intermediate-mass black holes in
merged dwarf galaxies may have been ejected from the center of their host
galaxies due to gravitational waves, carrying some central stars along. This
process can lead to the formation of hyper-compact star clusters, potentially
hosting black holes in the mass range of $10^4$ to $10^5$ solar masses. These
clusters are crucial targets for identifying and investigating
intermediate-mass black holes. However, no hyper-compact star clusters in the
Milky Way have been identified so far. In this paper, taking advantage of the
high spatial resolution power of Gaia, we used data from Gaia EDR3 and LAMOST
DR7, along with additional data from Pan-STARRS and SDSS, to conduct an initial
screening of 6,138,049 sources using various parameters of Gaia EDR3. A total
of 4,786 sources were selected for in-depth analysis. Each of these sources was
meticulously scrutinized by examining their images, spectra, and nearby
celestial objects to exclude various false positives, such as contaminations,
galaxies, wide binaries, or wrong matches. We finally identified one likely
hyper-compact star cluster candidate in the Milky Way, laying the foundation
for further high-resolution imaging and spectral verification.
| Search Query: ArXiv Query: search_query=au:”Huawei Zhang”&id_list=&start=0&max_results=3