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5 papers · 2 filters
The ACS Survey of Galactic Globular Clusters. XII. Photometric Binaries along the Main-Sequence
A. P. Milone, G. Piotto, L. R. Bedin +15
The fraction of binary stars is an important ingredient to interpret globular cluster dynamical evolution and their stellar population. We investigate the properties of main-sequen…
Elemental abundances in AGB stars and the formation of the Galactic bulge
Stefan Uttenthaler, Joris A. D. L. Blommaert, Thomas Lebzelter +4
We obtained high-resolution near-IR spectra of 45 AGB stars located in the Galactic bulge. The aim of the project is to determine key elemental abundances in these stars to help co…
The origin of very wide binary stars
M. B. N. Kouwenhoven, S. P. Goodwin, Melvyn B. Davies +3
A large population of fragile, wide (> 1000 AU) binary systems exists in the Galactic field and halo. These wide binary stars cannot be primordial because of the high stellar densi…
Coordinates and 2MASS and OGLE identifications for all stars in Arp's 1965 finding chart for Baade's Window
Ross P. Church, Jennifer A. Johnson, Sofia Feltzing
Aims: We seek to provide 2MASS and OGLE identifications and coordinates for all stars in the finding chart published by Arp\,(1965). This chart covers the low extinction area aroun…
Formation of Zr I and II lines under non-LTE conditions of stellar atmospheres
A. Velichko, L. Mashonkina, H. Nilsson
The non-local thermodynaic equilibrium (non-LTE) line formation for the two ions of zirconium is considered through a range of spectral types when the Zr abundance varies from the…