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Gemini Tracks Distant Star Cluster with Adaptive Optics
Gemini Distant Star Cluster Adaptive Optics
2017/7/20
We present a proper motion measurement for the halo globular cluster Pyxis, using HST/ACS data as the first epoch, and GeMS/GSAOI Adaptive Optics data as the second, separated by a baseline of ～ 5 yea...
Discovery of tidal tails around the distant globular cluster Palomar 14
tidal tails the distant globular cluster Palomar 14
2011/1/13
We report the detection of a pair of degree-long tidal tails associated with the globular cluster Palomar 14, using images obtained at the CFHT. We reveal a power-law departure from a King profile at...
Gas accretion as the origin of chemical abundance gradients in distant galaxies
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2010/12/29
It has recently been suggested that galaxies in the early Universe can grow through the accretion of cold gas, and that this may have been the main driver of star formation and stellar mass growth.