47 research outputs found
Infrared photometry and CaT spectroscopy of globular cluster M 28 (NGC 6626)
Recent studies show that the inner Galactic regions host genuine bulge
globular clusters, but also halo intruders, complex remnants of primordial
building blocks, and objects likely accreted during major merging events. In
this study we focus on the properties of M 28, a very old and massive cluster
currently located in the Galactic bulge. We analysed wide-field infrared
photometry collected by the VVV survey, VVV proper motions, and
intermediate-resolution spectra in the calcium triplet range for 113 targets in
the cluster area. Our results in general confirm previous estimates of the
cluster properties available in the literature. We find no evidence of
differences in metallicity between cluster stars, setting an upper limit of
Delta[Fe/H]<0.08 dex to any internal inhomogeneity. We confirm that M 28 is one
of the oldest objects in the Galactic bulge (13-14 Gyr). From this result and
the literature data, we find evidence of a weak age-metallicity relation among
bulge globular clusters that suggests formation and chemical enrichment. In
addition, wide-field density maps show that M 28 is tidally stressed and that
it is losing mass into the general bulge field. Our study indicates that M 28
is a genuine bulge globular cluster, but its very old age and its mass loss
suggest that this cluster could be the remnant of a larger structure, possibly
a primeval bulge building block.Comment: Accepted for publication in Astronomy & Astrophysic
Marketing the city of smells
This article explores how smell might contribute to urban identity, building on the strong links between smell, limbic processing and emotion. It critically examines existing scent marketing, psychology, and urban olfaction literatures, exploring the potential for the marketing of urban places through smell and capitalizing in particular on ambient smells that already exist within a locale. The article makes an initial threefold contribution to theory and practice: (i) demonstrating the current use of smell in city marketing, and the inherent challenges arising; (ii) identifying ways in which smell might be used in future urban place marketing activities, and in particular to more explicitly communicate the experiential attributes of being in a particular city; and (iii) proposing that olfaction may, in certain circumstances, be an effective way of incorporating a more participatory modus operandi within urban place marketing effort. The article concludes with a further overarching theoretical contribution, involving a consideration of place marketing that incorporates non-representational perspectives