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- Lawrence Berkeley National LaboratoryUS199 papers
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33 papers · 1 filter
Globular clusters in the outer halo of M31: the survey
A. P. Huxor, N. R. Tanvir, A. M. N. Ferguson +4
We report the discovery of 40 new globular clusters (GCs) that have been found in surveys of the halo of M31 based on INT/WFC and CHFT/Megacam imagery. A subset of these these new…
Gemini/GMOS Spectroscopy of the Spheroid and Globular Cluster System of NGC 3923
Mark A. Norris, Ray M. Sharples, Terry Bridges +8
We present a technique to extract ultra-deep diffuse-light spectra from the standard multi-object spectroscopic observations used to investigate extragalactic globular cluster (GC)…
On Minimal Tree Realizations of Linear Codes
Navin Kashyap
A tree decomposition of the coordinates of a code is a mapping from the coordinate set to the set of vertices of a tree. A tree decomposition can be extended to a tree realization,…
Lifetimes of states in 19Ne above the 15 O + alpha breakup threshold
S. Mythili, B. Davids, T. K. Alexander +19
The 15O(alpha,gamma)19Ne reaction plays a role in the ignition of Type I x-ray bursts on accreting neutron stars. The lifetimes of states in 19Ne above the 15O + alpha threshold of…
Shannon-McMillan theorems for discrete random fields along curves and lower bounds for surface-order large deviations
Julia Brettschneider
The notion of a surface-order specific entropy h_c(P) of a two-dimensional discrete random field P along a curve c is introduced as the limit of rescaled entropies along lattice ap…
The Frequency of Large Radius Hot and Very Hot Jupiters in omega Centauri
David T F Weldrake, Penny D Sackett, Terry J Bridges +1
We present the results of a deep, wide-field search for transiting `Hot Jupiter (HJ)' planets in the globular cluster omega Centauri. As a result of a 25-night observing run with t…