4,784 research outputs found
The nature of obscuration in AGN: II. insights from clustering properties
Based on large optical and mid-infrared (IR) surveys, we investigate the
relation between nuclear activity in local Seyfert 2 galaxies and galaxy
interactions using a statistical neighbour counting technique. At the same
level of host galaxy star formation (SF), we find that active galactic nuclei
(AGNs) with stronger [OIII] emission lines do not show an excess of near
neighbours, while AGNs with stronger mid-IR emission do have more near
neighbours within a projected distance of 100 kpc. The excess neighbour count
increases with decreasing projected radius. These results suggest a phase of
torus formation during galaxy interactions.Comment: 5 pages, 2 figures, accepted to MNRA
Understanding the ROC transfer payment in the renewable obligation with the recycling mechanism in the United Kingdom
A Note on State Decomposition Independent Local Invariants
We derive a set of invariants under local unitary transformations for
arbitrary dimensional quantum systems. These invariants are given by
hyperdeterminants and independent from the detailed pure state decompositions
of a given quantum state. They also give rise to necessary conditions for the
equivalence of quantum states under local unitary transformations
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