The build-up of the colour-magnitude relation in galaxy clusters since z ~ 0.8
- G. Lucia, B. Poggianti, L. Simard
- Physics
- 12 October 2006
Using galaxy clusters from the ESO Distant Cluster Survey, we study how the distribution of galaxies along the colour-magnitude relation has evolved since z ~ 0.8. While red-sequence galaxies in all…
The DART Imaging And CaT Survey of the Fornax Dwarf Spheroidal Galaxy
- G. Battaglia, E. Tolstoy, K. Sadakane
- Physics
- 17 August 2006
Aims. As part of the DART project we have used the ESO ESO/2.2m Wide Field Imager in conjunction with the VLT/FLAMES(star star) GIRAFFE spectrograph to study the detailed properties of the resolved…
Mayall II = G1 in M31: Giant Globular Cluster or Core of a Dwarf Elliptical Galaxy?
- G. Meylan, A. Sarajedini, P. Jablonka, S. Djorgovski, T. Bridges, R. Rich
- Physics
- 1 May 2001
At the moment, only the anticorrelation of metallicity with age recently observed in ω Centauri suggests that this cluster enriched itself over a timescale of about 3 Gyr. This contradicts the…
The Kinematic Status and Mass Content of the Sculptor Dwarf Spheroidal Galaxy
- G. Battaglia, A. Helmi, E. Tolstoy, M. Irwin, V. Hill, P. Jablonka
- Physics
- 1 July 2008
We present VLT FLAMES spectroscopic observations (R ∼ 6500) in the Ca II triplet region for 470 probable kinematic members of the Sculptor (Scl) dwarf spheroidal galaxy. The accurate velocities (±2…
Two Distinct Ancient Components in the Sculptor Dwarf Spheroidal Galaxy: First Results from the Dwarf Abundances and Radial Velocities Team
- E. Tolstoy, M. Irwin, T. Abel
- Physics
- 20 December 2004
We have found evidence for the presence of two distinct ancient stellar components (both ≥10 Gyr old) in the Sculptor dwarf spheroidal galaxy. We used the ESO Wide Field Imager in conjunction with…
A New View of the Dwarf Spheroidal Satellites of the Milky Way from VLT FLAMES: Where Are the Very Metal-poor Stars?
- A. Helmi, M. Irwin, T. Szeifert
- Physics
- 10 November 2006
As part of the Dwarf galaxies Abundances and Radial-velocities Team (DART) program, we have measured the metallicities of a large sample of stars in four nearby dwarf spheroidal galaxies (dSph's):…
The Buildup of the Red Sequence in Galaxy Clusters since z ∼ 0.8
- G. De Lucia, B. Poggianti, S. White
- Physics
- 21 June 2004
We study the rest-frame (U - V) color-magnitude relation in four clusters at redshifts 0.7-0.8, drawn from the ESO Distant Cluster Survey (EDisCS). We confirm that the red-sequence galaxies in these…
The Evolution of the Star Formation Activity in Galaxies and Its Dependence on Environment
- B. Poggianti, A. von der Linden, D. Zaritsky
- Physics
- 15 December 2005
We study how the proportion of star-forming galaxies evolves between z = 0.8 and 0 as a function of galaxy environment, using the O II line in emission as a signature of ongoing star formation. Our…
A high-resolution VLT/FLAMES study of individual stars in the centre of the Fornax dwarf spheroidal galaxy
- B. Letarte, V. Hill, K. Sadakane
- Physics
- 6 July 2010
For the first time we show the detailed, late-stage, chemical evolution history of a small nearby dwarf spheroidal galaxy in the Local
Group. We present the results of a high-resolution (R ~ 20 000,…
THE ENVIRONMENTS OF STARBURST AND POST-STARBURST GALAXIES AT z = 0.4–0.8
- B. Poggianti, A. Aragón-Salamanca, S. White
- Physics
- 3 November 2008
Post-starburst (E+A or k+a) spectra, characterized by their exceptionally strong Balmer lines in absorption and the lack of emission lines, belong to galaxies in which the star formation (SF)…
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