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What is 10 miles across,but powers an explosion brighter than the Milky Way?
10 miles across explosion brighter the Milky Way
2016/2/22
Right now, astronomers are viewing a ball of hot gas billions of light years away that is radiating the energy of hundreds of billions of suns. At its heart is an object a little larger than 10 miles ...
Event Horizon Telescope Reveals Magnetic Fields at Milky Way's Central Black Hole
Telescope Magnetic Fields Milky Way Central Black Hole
2015/12/14
Most people think of black holes as giant vacuum cleaners sucking in everything that gets too close. But the supermassive black holes at the centers of galaxies are more like cosmic engines, convertin...
We studied the global distribution and kinematics of the extra-planar neutral gas in the Milky Way.
Could the Hercules satellite be a stellar stream in the Milky Way halo?
Galaxy Astrophysics (astro-ph.GA)
2010/12/29
We investigate the possibility that Hercules, a recently discovered Milky Way (MW) satellite, is a stellar stream in the process of formation. This hypothesis is motivated by Hercules' highly elongate...
Stellar Population Variations in the Milky Way's Stellar Halo
Cosmology and Extragalactic Astrophysics (astro-ph.CO) Galaxy Astrophysics (astro-ph.GA)
2010/12/29
If the stellar halos of disk galaxies are built up from the disruption of dwarf galaxies, models predict highly structured variations in the stellar populations within these halos.
NGC 2419 -- Another Remnant of Accretion by the Milky Way
Galaxy Astrophysics (astro-ph.GA) Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/22
We isolate a sample of 43 upper RGB stars in the extreme outer halo Galactic globular cluster NGC 2419 from two Keck/DEIMOS slitmasks. The probability that there is more than one contaminating halo fi...