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The VMC Survey - I. Strategy and First Data
M. -R. L. Cioni, G. Clementini, L. Girardi +31
The new VISual and Infrared Telescope for Astronomy (VISTA) has started operations. Over its first five years it will be collecting data for six public surveys, one of these is the…
Simple stellar population models including blue stragglers
Yu Xin, Licai Deng, Richard de Grijs +1
Observations show that nearly all star clusters and stellar populations contain blue straggler stars (BSs). BSs in a cluster can significantly enhance the integrated spectrum of th…
An updated catalog of M31 globular-like clusters: UBVRI photometry, ages, and masses
Zhou Fan, Richard de Grijs, Xu Zhou
We present an updated UBVRI photometric catalog containing 970 objects in the field of M31, selected from the Revised Bologna Catalog (RBC v.4.0), including 965, 967, 965, 953, and…
Near-infrared and optical observations of galactic warps: A common, unexplained feature of most discs
A. Guijarro, R. F. Peletier, E. Battaner +3
Context: Warps occurring in galactic discs have been studied extensively in HI and in the optical, but rarely in the near-infrared (NIR) bands that trace the older stellar populati…
The early dynamical evolution of cool, clumpy star clusters
Richard J. Allison, Simon P. Goodwin, Richard J. Parker +2
Observations and theory both suggest that star clusters form sub-virial (cool) with highly sub-structured distributions. We perform a large ensemble of N-body simulations of modera…