25,246 research outputs found
Average household incomes for UK pensioners are reducing each year due to harmful government reforms and the Bank of England’s monetary policies
Ros Altmann argues for supporting pensioners who have been negatively impacted by monetary and fiscal policy since 2008. She highlights the distributional inequities of the Bank of England’s policies in dealing with the economy and calls for more consideration for pensioners who are seeing their savings dwindle
Proper identification of RR Lyrae Stars brighter than 12.5 mag
RR Lyrae stars are of great importance for investigations of Galactic
structure. However, a complete compendium of all RR-Lyraes in the solar
neighbourhood with accurate classifications and coordinates does not exist to
this day. Here we present a catalogue of 561 local RR-Lyrae stars V_max less
equal 12.5 mag according to the magnitudes given in the Combined General
Catalogue of Variable Stars (GCVS) and 16 fainter ones. The Tycho2 catalogue
contains about 100 RR Lyr stars. However, many objects have inaccurate
coordinates in the GCVS, the primary source of variable star information, so
that a reliable cross-identification is difficult. We identified RR Lyrae from
both catalogues based on an intensive literature search. In dubious cases we
carried out photometry of fields to identify the variable. Mennessier and
Colome (2002) have published a paper with Tyc2-GCVS identifications, but we
found that many of their identifications are wrong.
Keywords: astrometry -- Stars: RR Lyrae stars -- Catalogues: Tycho-2
catalogue -- Catalogues: The HST Guide Star Catalogue, Version 1.2 --
Catalogues: Combined General Catalogue of Variable StarsComment: 5 pages with 2 figures; A and A accepted Online-Data are available
under http://www.astro.uni-bonn.de/~gmaint
A multiscale method for heterogeneous bulk-surface coupling
In this paper, we construct and analyze a multiscale (finite element) method
for parabolic problems with heterogeneous dynamic boundary conditions. As
origin, we consider a reformulation of the system in order to decouple the
discretization of bulk and surface dynamics. This allows us to combine
multiscale methods on the boundary with standard Lagrangian schemes in the
interior. We prove convergence and quantify explicit rates for low-regularity
solutions, independent of the oscillatory behavior of the heterogeneities. As a
result, coarse discretization parameters, which do not resolve the fine scales,
can be considered. The theoretical findings are justified by a number of
numerical experiments including dynamic boundary conditions with random
diffusion coefficients
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