While recent sky surveys have uncovered large numbers of ever fainter Milky Way satellites, their classification as star clusters, low-luminosity galaxies, or tidal overdensities remains often unclear. Likewise, their contributions to the build-up of the halo is yet debated. In this contribution we...
The halo of the Milky Way provides a laboratory to study the properties of the shocked hot gas that is predicted by models of galaxy formation. There is observational evidence of energy injection into the halo from past activity in the nucleus of the Milky Way1,2,3,4; however, the origin...
The last 10-20 years has seen a profound shift in views of how the Galaxy's halo formed. The idea of a monolithic early collapse of a single system (Eggen, Lynden-Bell and Sandage 1962) has been challenged by observations at high redshift and by cosmolog
If these black holes existed in the Milky Way dark matter halo, they would cause long-timescale gravitational microlensing events lasting years13. The previous experiments were not sufficiently sensitive to such events14,15,16,17. Here we present the results of the search for long-timescale ...
Astronomers measured the Milky Way's stellar halo. It's the shape of a football, is oddly tilted, and they think a collision is to blame.
BEIJING, July 2 (Xinhua) -- Chinese scientists recently proposed that the current dark matter halo of the Milky Way is "slightly oblate." The study, conducted by researchers from the University of the Chinese Academy of Sciences (UCAS), in collaboration with several domestic and international re...
The Hercules Satellite: A Stellar Stream in the Milky Way Halo? being bound stellar systems dominated by dark matter but, in fact, stellar streams in formation, shedding their stars in the Milky Way's stellar halo.do... M Koleva,P Prugniel,I Vauglin,... - 《Astrophysical Journal》 被...
These three chief components of the Milky Way are thought to have formed at different times, with the halo taking shape first. The oldest globular clusters in our galaxy are 13.5 billion years old, meaning they formed just 200 million years or so after the Big Bang that created the universe...
The Milky Way halo is the brightest source of dark matter annihilation on the sky. Indeed, the potential strength of the Galactic dark matter signal can supersede that expected from dwarf galaxies and galaxy groups even in regions away from the Inner Galaxy. In this Letter, we present the res...
2023 colloquium title probing the circumgalactic medium of the milky way time 2023年11月15日(星期三) 15:00-16:00 venue 理科楼5号楼300号报告厅 01. 摘要 abstract the circumgalactic medium (cgm) encompasses the gasand dust spread...