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Constraining the halo bispectrum in real and redshift space from perturbation theory and non-linear stochastic bias
(Wiley Blackwell Publishing, Inc, 2015-04)
We present a method to produce mock galaxy catalogues with efficient perturbation theory schemes, which match the number density, power spectra and bispectra in real and in redshift space from N-body simulations. The ...
New observational constraints on interacting dark energy using galaxy clusters virial equilibrium states
(2019-12-01)
The nature of the dark sector components of the Universe still remains one of the largest unknown. Among many possibilities, it has been speculated that dark matter and dark energy may be more tightly coupled than usually ...
First confirmed ultra-compact dwarf galaxy in the NGC 5044 group
(EDP Sciences, 2017-03)
Context: Ultra-compact dwarfs (UCDs) are stellar systems displaying colours and metallicities between those of globular clusters (GCs) and early-type dwarf galaxies, as well as sizes of Reff ≲ 100 pc and luminosities in ...
Fossil groups in the Millennium simulation Their environment and its evolution
(EDP SCIENCES S APARIS, 2011)
Context. Fossil systems are defined to be X- ray bright galaxy groups ( or clusters) with a two- magnitude difference between their two brightest galaxies within half the projected virial radius, and represent an interesting ...
DERIVING METALLICITIES FROM THE INTEGRATED SPECTRA OF EXTRAGALACTIC GLOBULAR CLUSTERS USING THE NEAR-INFRARED CALCIUM TRIPLET
(IOP PUBLISHING LTD, 2010)
The Ca II triplet (CaT) feature in the near-infrared has been employed as a metallicity indicator for individual stars as well as integrated light of Galactic globular clusters (GCs) and galaxies with varying degrees of ...
THE VORONOI TESSELLATION CLUSTER FINDER IN 2+1 DIMENSIONS
(IOP PUBLISHING LTD, 2011)
We present a detailed description of the Voronoi Tessellation (VT) cluster finder algorithm in 2+1 dimensions, which improves on past implementations of this technique. The need for cluster finder algorithms able to produce ...
The globular cluster kinematics and galaxy dark matter content of NGC 3923
(WILEY-BLACKWELLMALDEN, 2013-08-02)
This paper presents further results from our spectroscopic study of the globular cluster (GC) system of the group elliptical NGC 3923. From observations made with the GMOS instrument on the Gemini South Telescope, an ...
CA II triplet spectroscopy of small magellanic cloud red giants. III. Abundances and velocities for a sample of 14 clusters
(IOP Publishing, 2015-05)
We obtained spectra of red giants in 15 Small Magellanic Cloud (SMC) clusters in the region of the Ca ii lines with FORS2 on the Very Large Telescope. We determined the mean metallicity and radial velocity with mean errors ...
Homogeneous photometry and star counts in the field of 9 Galactic star clusters
(Elsevier B.V., 2009-05-28)
We present homogeneous V, I CCD photometry of nine stellar fields in the two inner quadrants of the
Galactic plane. The lines-of-view to most of these fields aim in the direction of the very inner Galaxy,
where the ...
Gravity with Extra Dimensions and Dark Matter Interpretation: Phenomenological Example via Miyamoto-Nagai Galaxy
(SpringerNew YorkEUA, 2012)