4.3k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Centre National de la Recherche ScientifiqueFR463 papers
- European Southern ObservatoryCL443 papers
- Pontificia Universidad Católica de ChileCL281 papers
- University of WarsawPL244 papers
- California Institute of TechnologyUS242 papers
- University of ChileCL232 papers
- Space Telescope Science InstituteUS212 papers
- Center for Astrophysics Harvard & SmithsonianUS197 papers
- University of CambridgeGB192 papers
- Millennium Institute of AstrophysicsCL186 papers
- Universidad Andrés BelloCL177 papers
- Observatoire de ParisFR169 papers
21 papers · 2 filters
ARGOS II: The Galactic Bulge Survey
K. Freeman, M. Ness, E. Wylie de Boer +8
We describe the motivation, field locations and stellar selection for the ARGOS spectroscopic survey of 28,000 stars in the bulge and inner disk of the Milky Way galaxy across lati…
ARGOS III: Stellar Populations in the Galactic Bulge of the Milky Way
M. Ness, K. Freeman, E. Athanassoula +7
We present the metallicity results from the ARGOS spectroscopic survey of the Galactic bulge. Our aim is to understand the formation of the Galactic bulge: did it form via mergers,…
Elemental Abundances and their Implications for the Chemical Enrichment of the Boötes~I Ultra-Faint Galaxy
Gerard Gilmore, John E. Norris, Lorenzo Monaco +3
We present a double-blind analysis of high-dispersion spectra of seven red giant members of the Boötes I ultra-faint dwarf spheroidal galaxy, complemented with re-analysis of a sim…
The Arecibo Galaxy Environment Survey VI : The Virgo Cluster (II)
R. Taylor, J. I. Davies, R. Auld +2
We present 21 cm observations of a 5 x degree region in the Virgo cluster, obtained as part of the Arecibo Galaxy Environment Survey. 13 cluster members are detected, together with…
The age-metallicity relationship of the Large Magellanic Cloud field star population from wide-field Washington photometry
Andrés E. Piatti, Doug Geisler
We analyze ages and metallicities for some 5.5 million stars distributed throughout the Large Magellanic Cloud (LMC) main body, obtained from CCD Washington CT1 photometry. We prod…
Reddening and Extinction Toward the Galactic Bulge from OGLE-III: The Inner Milky Way's Rv ~ 2.5 Extinction Curve
David M. Nataf, Andrew Gould, Pascal Fouqué +11
We combine VI photometry from OGLE-III with VVV and 2MASS measurements of E(J-K_{s}) to resolve the longstanding problem of the non-standard optical extinction toward the Galactic…
The stretching of Hercules
A. J. Deason, V. Belokurov, N. W. Evans +2
We present VLT/FORS2 spectroscopy of candidate blue horizontal branch (BHB) stars in the vicinity of the Hercules ultrafaint dwarf galaxy. We identify eight convincing Hercules BHB…
The Unique Na:O Abundance Distribution in NGC 6791: The First Open(?) Cluster with Multiple Populations
D. Geisler, S. Villanova, G. Carraro +4
Almost all globular clusters investigated exhibit a spread in their light element abundances, the most studied being a Na:O anticorrelation. In contrast, open clusters show a homog…
The origin of the split red clump in the Galactic bulge of the Milky Way
M. Ness, K. Freeman, E. Athanassoula +8
Near the minor axis of the Galactic bulge, at latitudes b < -5 degrees, the red giant clump stars are split into two components along the line of sight. We investigate this split u…
Chandra Observations of Galaxy Zoo Mergers: Frequency of Binary Active Nuclei in Massive Mergers
Stacy H. Teng, Kevin Schawinski, C. Megan Urry +9
We present the results from a Chandra pilot study of 12 massive galaxy mergers selected from Galaxy Zoo. The sample includes major mergers down to a host galaxy mass of 10 $…
Slicing The Monoceros Overdensity with Suprime-Cam
Blair C. Conn, Noelia E. D. Noël, Hans-Walter Rix +7
We derive distance, density and metallicity distribution of the stellar Monoceros Overdensity (MO) in the outer Milky Way, based on deep imaging with the Subaru Telescope. We appli…
The cold veil of the Milky Way stellar halo
A. J. Deason, V. Belokurov, N. W. Evans +7
We build a sample of distant (D > 80 kpc) stellar halo stars with measured radial velocities. Faint () candidate blue horizontal branch (BHB) stars were selected using…
The Impact of Contaminated RR Lyrae/Globular Cluster Photometry on the Distance Scale
Daniel J. Majaess, David G. Turner, Wolfgang P. Gieren +1
RR Lyrae variables and the stellar constituents of globular clusters are employed to establish the cosmic distance scale and age of the universe. However, photometry for RR Lyrae v…
Kinematical and chemical vertical structure of the Galactic thick disk II. A lack of dark matter in the solar neighborhood
C. Moni Bidin, G. Carraro, R. A. Mendez +1
We estimated the dynamical surface mass density Sigma at the solar position between Z=1.5 and 4 kpc from the Galactic plane, as inferred from the kinematics of thick disk stars. Th…
Leo IV & V - A possible dwarf galaxy pair ?
Matias Blaña, Michael Fellhauer, Rory Smith
The last few years have seen the discovery of many faint and ultra-faint dwarf spheroidal galaxies around the Milky Way. Among these is a pair of satellites called Leo IV and Leo V…
The Tidal Tails of 47 Tucanae
Richard R. Lane, Andreas H. W. Küpper, Douglas C. Heggie
The Galactic globular cluster 47 Tucanae (47 Tuc) shows a rare increase in its velocity dispersion profile at large radii, indicative of energetic, yet bound, stars at large radii…
Photometric study of Galactic star clusters in the VVV survey
F. Mauro, C. Moni Bidin, D. Geisler
We show the preliminary analysis of some Galactic stellar clusters (GSCls) candidates and the results of the analysis of two new interesting GSCls found in the "VISTA Variables in…
Detailed abundances in stars belonging to ultra-faint dwarf spheroidal galaxies
P. François, L. Monaco, S. Villanova +7
We report preliminary results concerning the detailed chemical composition of metal poor stars belonging to close ultra-faint dwarf galaxies (hereafter UfDSphs). The abundances hav…
Discovery of the Host Cluster for the Fundamental Cepheid Calibrator Zeta Gem
Daniel J. Majaess, David G. Turner, Wolfgang Gieren +2
New and existing CORAVEL, UBVJHKs, HST, HIP/Tycho, ARO, KPNO, and DAO observations imply that the fundamental Cepheid calibrator Zeta Gem is a cluster member. The following paramet…
Kinematical and chemical vertical structure of the Galactic thick disk I. Thick disk kinematics
C. Moni Bidin, G. Carraro, R. A. Mendez
The variation of the kinematical properties of the Galactic thick disk with Galactic height Z are studied by means of 412 red giants observed in the direction of the south Galactic…
The helium content of globular clusters: NGC6121 (M4)
S. Villanova, D. Geisler, G. Piotto +1
He has been proposed as a key element to interpret the observed multiple MS, SGB, and RGB, as well as the complex horizontal branch (HB) morphology. Stars belonging to the bluer pa…