Context.The recently-discovered lack of close binaries, among extreme horizontal branch (EHB) stars in Galactic globular clusters, has thus far constituted a major puzzle, in view of the fact that blue subdwarf stars - the ...

We have gathered a sample of 112 main-sequence starswith known debris disks.We collected published information and performed adaptive optics observations at Lick Observatory to determine if these debris disks are ...

Context. The recently-discovered lack of close binaries, among extreme horizontal branch (EHB) stars in Galactic globular clusters, has thus far constituted a major puzzle, in view of the fact that blue subdwarf stars – ...

We introduce a dynamic data structure for the compact representation of binary relations R subset of A x B. The data structure is a dynamic variant of the k(2)-tree, a static compact representation that takes advantage of ...

In this paper we establish the connections between two different extensions of Z(4)-linearity for binary Hamming spaces, We present both notions - propelinearity and G-linearity - in the context of isometries and group ...