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- Australian Astronomical ObservatoryAU873 papers
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- Centre National de la Recherche ScientifiqueFR410 papers
- Australian Astronomical OpticsAU324 papers
- International Centre for Radio Astronomy ResearchAU318 papers
- UNSW SydneyAU309 papers
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20 papers · 2 filters
Very Metal-Poor Outer-Halo Stars with Round Orbits
Kohei Hattori, Yuzuru Yoshii, Timothy C. Beers +2
The orbital motions of halo stars in the Milky Way reflect the orbital motions of the progenitor systems in which they formed, making it possible to trace the mass-assembly history…
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…
The Stellar Metallicity Distribution Function of the Galactic Halo from SDSS Photometry
Deokkeun An, Timothy C. Beers, Jennifer A. Johnson +6
We explore the stellar metallicity distribution function of the Galactic halo based on SDSS ugriz photometry. A set of stellar isochrones is calibrated using observations of severa…
Sparse Aperture Masking Observations of the FL Cha Pre-transitional Disk
Lucas A. Cieza, Sylvestre Lacour, Matthias R. Schreiber +9
We present deep Sparse Aperture Masking (SAM) observations obtained with the ESO Very Large Telescope of the pre-transitional disk object FL Cha (SpT=K8, d=160 pc), the disk of whi…
Fluorine variations in the globular cluster NGC 6656 (M22): implications for internal enrichment timescales
Valentina D'Orazi, Sara Lucatello, Maria Lugaro +8
Observed chemical (anti)correlations in proton-capture elements among globular cluster stars are presently recognized as the signature of self-enrichment from now extinct, previous…
Searching for multiple stellar populations in the massive, old open cluster Berkeley 39
A. Bragaglia, R. G. Gratton, E. Carretta +3
The most massive star clusters include several generations of stars with a different chemical composition (mainly revealed by an Na-O anti-correlation) while low-mass star clusters…