The Ursa Major Cluster (Second Paper)
نویسندگان
چکیده
منابع مشابه
Turbulence in the Ursa Major cirrus cloud
High resolution 21 cm observations of the Ursa Major cirrus revealed highly filamentary structures down to the 0.03 pc resolution. These filaments, still present in the line centroid map, show multi-Gaussian components and seem to be associated with high vorticity regions. Probability density functions of line centroid increments and structure functions were computed on the line centroid field,...
متن کاملCopper and Barium Abundances in the Ursa Major Moving Group
We present Cu and Ba abundances for 7 G-K dwarf stars, members of the solarmetallicity, 0.3 Gyr old Ursa Major Moving Group. All analyzed member stars show [Ba/Fe] excesses of +0.3-plus, associated with [Cu/Fe] deficiencies of up to −0.23 dex. The present results suggest that there is an anti-correlation between the abundances of Cu and the heavy elements produced by the main component of the n...
متن کاملIs Ursa Major II the Progenitor of the Orphan Stream?
Prominent in the ‘Field of Streams’ – the Sloan Digital Sky Survey map of substructure in the Galactic halo – is an ‘Orphan Stream’ without obvious progenitor. In this numerical study, we show a possible connection between the newly found dwarf satellite Ursa Major II (UMa II) and the Orphan Stream. We provide numerical simulations of the disruption of UMa II that match the observational data o...
متن کاملUrsa Minor: Versatile Cluster-based Storage (CMU-PDL-05-104)
No single encoding scheme or fault model is optimal for all data. A versatile storage system allows them to be matched to access patterns, reliability requirements, and cost goals on a per-data item basis. Ursa Minor is a cluster-based storage system that allows data-specific selection of, and on-line changes to, encoding schemes and fault models. Thus, different data types can share a scalable...
متن کاملUrsa Major: a Missing Low-mass Cdm Halo?
The recently discovered Ursa Major dwarf spheroidal (dSph) galaxy candidate is about five to eight times less luminous than the faintest previously known dSphs And IX, Draco, and UMi. In this Letter, we present velocity measurements of seven color-magnitude selected UMajor candidate stars. Two of them are apparent non-members based on metallicity and velocity, and the remaining five stars yield...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1939
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/99.9.710