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200 papers · 1 filter
Dynamical age differences among coeval star clusters as revealed by blue stragglers
F. R. Ferraro, B. Lanzoni, E. Dalessandro +11
Globular star clusters that formed at the same cosmic time may have evolved rather differently from a dynamical point of view (because that evolution depends on the internal enviro…
Bright radio emission from an ultraluminous stellar-mass microquasar in M31
Matthew J. Middleton, James C. A. Miller-Jones, Sera Markoff +34
A subset of ultraluminous X-ray sources (those with luminosities < 10^40 erg/s) are thought to be powered by the accretion of gas onto black holes with masses of ~5-20 M_solar, pro…
A lower radius and mass for the transiting extrasolar planet HAT-P-8b
L. Mancini, J. Southworth, S. Ciceri +10
Context. The extrasolar planet HAT-P-8 b was thought to be one of the more inflated transiting hot Jupiters. Aims. By using new and existing photometric data, we computed precise e…
The evolution of galaxy sizes
Bianca M. Poggianti, Rosa Calvi, Daniele Bindoni +10
We present a study of galaxy sizes in the local Universe as a function of galaxy environment, comparing clusters and the general field. Galaxies with radii and masses comparable to…
H-ATLAS: The cosmic abundance of dust from the far-infrared background power spectrum
Cameron Thacker, Asantha Cooray, Joseph Smidt +22
We present a measurement of the angular power spectrum of the cosmic far-infrared background (CFIRB) anisotropies in one of the extragalactic fields of the Herschel Astrophysical T…
An aluminium tool for multiple stellar generations in the globular clusters 47 Tuc and M 4
Eugenio Carretta, Raffaele Gratton, Angela Bragaglia +2
We present aluminium abundances for a sample of about 100 red giant stars in each of the Galactic globular clusters 47 Tuc (NGC 104) and M 4 (NGC 6121). We have derived homogeneous…