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91 papers · 1 filter
Very Long-term Optical Variability of High Mass X-ray Binaries in the SMC
A. F. Rajoelimanana, P. A. Charles, A. Udalski
We have studied the very long-term temporal properties of the optical emission from Be X-ray binaries (BeX) in the Small Magellanic Cloud over a ~ 16 yr baseline, using light curve…
CMB spectra and bispectra calculations: making the flat-sky approximation rigorous
Francis Bernardeau, Cyril Pitrou, Jean-Philippe Uzan
This article constructs flat-sky approximations in a controlled way in the context of the cosmic microwave background observations for the computation of both spectra and bispectra…
Qualitative and Quantitative Energy Loss?
W. A. Horowitz
Despite the 300% systematic theoretical uncertainty associated with extracting qhat using current energy loss models due to the collinear approximation, and despite the uncertainti…
Period-luminosity relations of type II Cepheids in the Magellanic Clouds
Noriyuki Matsunaga, Michael W. Feast, Igor Soszynski
Period-luminosity relations (PLRs) of type II Cepheids (T2Cs) in the Small Magellanic Cloud are derived based on OGLE-III, IRSF/SIRIUS and other data, and these are compared with r…
The thick disk in the galaxy NGC 4244 from S4G imaging
Sébastien Comerón, Johan H. Knapen, Kartik Sheth +16
If thick disks are ubiquitous and a natural product of disk galaxy formation and/or evolution processes, all undisturbed galaxies which have evolved during a significant fraction o…
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…