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The eleventh and twelfth data releases of the Sloan Digital Sky Survey: final data from SDSS-III
- S. Alam, F. D. Albareti, Key Laboratory of Optical Astronomy
- Physics
- 5 January 2015
The third generation of the Sloan Digital Sky Survey (SDSS-III) took data from 2008 to 2014 using the original SDSS wide-field imager, the original and an upgraded multi-object fiber-fed optical…
Distances and ages of NGC 6397, NGC 6752 and 47 Tuc
- R. Gratton, A. Bragaglia, U. Padova
- Physics
- 1 July 2003
New improved distances and absolute ages for the Galactic globular clusters NGC 6397, NGC 6752, and 47 Tuc are obtained using the Main Sequence Fitting Method. We derived accurate estimates of…
Detailed abundances of a large sample of giant stars in M 54 and in the Sagittarius nucleus
- E. Carretta, A. Bragaglia, U. Padova
- Physics
- 30 June 2010
Homogeneous abundances of light elements, α-elements, and Fe-group elements from high-resolution FLAMES spectra are presented for 76 red giant stars in NGC 6715 (M 54), a massive globular cluster…
Abundances for metal-poor stars with accurate parallaxes , I. Basic data
- R. Gratton, E. Carretta, Cisas
- Physics
- 31 March 2003
We present element-to-element abundance ratios measured from high dispersion spectra for 150 field subdwarfs and early subgiants with accurate Hipparcos parallaxes (errors <20%). For 50 stars new…
Comparing the temperatures of galaxy clusters from hydrodynamical N-body simulations to Chandra and XMM-Newton observations
- P. Mazzotta, E. Rasia, It.
- Physics
- 21 April 2004
Theoretical studies of the physical processes guiding the formation and evolution of galaxies and galaxy clusters in the X-ray region are mainly based on the results of numerical hydrodynamical…
M54 + Sagittarius = ω Centauri
- E. Carretta, A. Bragaglia, U. Padova
- Physics
- 9 February 2010
We derive homogeneous abundances of Fe, O, Na, and α-elements from high-resolution FLAMES spectra for 76 red giant stars in NGC 6715 (M54) and for 25 red giants in the surrounding nucleus of the…
The Herschel Multi-tiered Extragalactic Survey: HerMES
TLDR
Outer structure of the Galactic warp and flare: explaining the Canis Major over-density
Aims. In this paper we derive the structure of the Galactic stellar warp and flare. Methods. We use 2MASS red clump and red giant stars, selected at mean and fixed heliocentric distances of…
Abundances for a Large Sample of Red Giants in NGC 1851: Hints for a Merger of Two Clusters?
- E. Carretta, R. Gratton, U. Padova
- Physics
- 29 July 2010
We present the abundance analysis of a sample of more than 120 red giants in the globular cluster (GC) NGC 1851, based on FLAMES spectra. We find a small but detectable metallicity spread. This…
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