CONSTRAINTS ON MACHO DARK MATTER FROM COMPACT STELLAR SYSTEMS IN ULTRA-FAINT DWARF GALAXIES

• Published in: Astrophysical journal. Letters Vol. 824; no. 2; p. L31
• Main Author: Brandt, Timothy D.
• Format: Journal Article
• Language: English
• Published: United States The American Astronomical Society 20.06.2016
• Subjects: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; Clusters; Dark matter; Disks; DISPERSIONS; Dwarf galaxies; GALAXIES; galaxies: dwarf; galaxies: kinematics and dynamics; HEATING; LIMITING VALUES; MASS; NONLUMINOUS MATTER; STAR CLUSTERS; STARS; stars: kinematics and dynamics; VELOCITY; VISIBLE RADIATION

ABSTRACT I show that a recently discovered star cluster near the center of the ultra-faint dwarf galaxy Eridanus II provides strong constraints on massive compact halo objects (MACHOs) of 5 M as the main component of dark matter. MACHO dark matter will dynamically heat the cluster, driving it to lar...