The metal content of bulge field stars from FLAMES-GIRAFFE spectra - I. Stellar parameters and iron abundances
- M. Zoccali, V. Hill, S. Ortolani
- Physics
- 8 May 2008
Aims. We determine the iron distribution function (IDF) for bulge field stars, in three different fields along the Galactic minor axis and at latitudes b = −4 ◦ , b = −6 ◦ ,a ndb = −12 ◦ . A fourth…
Age and Metallicity Distribution of the Galactic Bulge from Extensive Optical and Near-IR Stellar Photometry
- M. Zoccali, A. Renzini, E. Bica
- Physics
- 30 October 2002
We present a new determination of the metallicity distribution, age, and luminosity function of the Galactic bulge stellar population. By combining near-IR data from the 2MASS survey, from the SOFI…
HST color-magnitude diagrams of 74 galactic globular clusters in the HST F439W and F555W bands ⋆
- G. Piotto, I. King, A. Renzini
- Physics
- 4 July 2002
We present the complete photometric database and the color-magnitude diagrams for 74 Galactic globular clusters observed with the HST/WFPC2 camera in the F439W and F555W bands. A detailed discussion…
Sloan Digital Sky Survey IV: Mapping the Milky Way, Nearby Galaxies, and the Distant Universe
- M. Blanton, M. Bershady, H. Zou
- Physics
- 28 February 2017
We describe the Sloan Digital Sky Survey IV (SDSS-IV), a project encompassing three major spectroscopic programs. The Apache Point Observatory Galactic Evolution Experiment 2 (APOGEE-2) is observing…
Reddening and metallicity maps of the Milky Way bulge from VVV and 2MASS II. The complete high resolution extinction map and implications for Galactic bulge studies
- O. Gonzalez, M. Rejkuba, B. Chen
- Physics
- 18 April 2012
Context. The Milky Way bulge is the nearest galactic bulge and the most readily accessible laboratory for studies of stellar populations in spheroids based on individual stellar abundances and…
The two metallicity groups of the globular cluster M 22: a chemical perspective
- A. Marino, C. Sneden, P. Stetson
- Physics
- 8 May 2011
We present a detailed chemical composition analysis of 35 red giant stars in the globular cluster M22. High resolution spectra for this study were obtained at five observatories, and analyzed in a…
Distances of the bulge globular clusters Terzan 5, Liller 1, UKS 1, and Terzan 4 based on HST NICMOS photometry
- S. Ortolani, B. Barbuy, E. Bica, M. Zoccali, A. Renzini
- Physics
- 28 May 2007
Context. A large number of pulsars and X-rays sources are detected in globular clusters. To understand the structure and content of these clusters, accurate distances are required. Aims. We derive…
VISTA Variables in the Via Lactea (VVV): The public ESO near-IR variability survey of the Milky Way
- D. Minniti, P. Lucas, M. Zoccali
- Education
- 5 December 2009
Oxygen, Sodium, Magnesium and Aluminium as tracers of the Galactic Bulge Formation
- A. Lecureur, V. Hill, A. Renzini
- Physics
- 12 October 2006
Aims. This paper investigates the peculiar behaviour of the light even (alpha-elements) and odd atomic number elements in red giants in the galactic bulge, both in terms of the chemical evolution of…
The Initial Mass Function of the Galactic Bulge down to ~0.15 M☉
- M. Zoccali, S. Cassisi, A. Stephens
- Physics
- 28 June 1999
We present a luminosity function (LF) for lower main-sequence stars in the Galactic bulge near (l,b) = (0°, -6°) to J = 24, corresponding to MJ ~ 9.3. This LF is derived from Hubble Space Telescope…
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