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Optical analysis of a CMB cosmic string candidate
O. S. Sazhina, D. Scognamiglio, M. V. Sazhin +1
The complexity of the cosmological scenario regarding cosmic strings (CSs) stands still in the way of a complete understanding. We describe here a promising strategy for the possib…
Weak Lensing Study in VOICE Survey II: Shear Bias Calibrations
Dezi Liu, Liping Fu, Xiangkun Liu +14
The VST Optical Imaging of the CDFS and ES1 Fields (VOICE) Survey is proposed to obtain deep optical imaging of the CDFS and ES1 fields using the VLT Survey Telescope (VST).…
Weak Lensing Study in VOICE Survey I: Shear Measurement
Liping Fu, Dezi Liu, Mario Radovich +15
The VST Optical Imaging of the CDFS and ES1 Fields (VOICE) Survey is a Guaranteed Time program carried out with the ESO/VST telescope to provide deep optical imaging over two 4 deg…
Supernova rates from the SUDARE VST-Omegacam search. I
E. Cappellaro, M. T. Botticella, G. Pignata +23
We describe the observing strategy, data reduction tools and early results of a supernova (SN) search project, named SUDARE, conducted with the ESO VST telescope aimed at measuring…
The first and second data releases of the Kilo-Degree Survey
Jelte T. A. de Jong, Gijs A. Verdoes Kleijn, Danny R. Boxhoorn +46
The Kilo-Degree Survey (KiDS) is an optical wide-field imaging survey carried out with the VLT Survey Telescope and the OmegaCAM camera. KiDS will image 1500 square degrees in four…
The Planetary Nebula Spectrograph survey of S0 galaxy kinematics. Data and Overview
A. Cortesi, M. Arnaboldi, L. Coccato +11
The origins of S0 galaxies remain obscure, with various mechanisms proposed for their formation, likely depending on environment. These mechanisms would imprint different signature…
Testing Yukawa-like potentials from f(R)-gravity in elliptical galaxies
N. R. Napolitano, S. Capozziello, A. J. Romanowsky +2
We present the first analysis of extended stellar kinematics of elliptical galaxies where a Yukawa--like correction to the Newtonian gravitational potential derived from f(R)-gravi…
Stellar mass-to-light ratio gradients in galaxies: correlations with mass
C. Tortora, N. R. Napolitano, A. J. Romanowsky +3
We analyze the stellar mass-to-light ratio (M/L) gradients in a large sample of local galaxies taken from the Sloan Digital Sky Survey, spanning a wide range of stellar masses and…
The PN.S Elliptical Galaxy Survey: a standard LCDM halo around NGC 4374?
N. R. Napolitano, A. J. Romanowsky, M. Capaccioli +10
As part of our current programme to test LCDM predictions for dark matter (DM) haloes using extended kinematical observations of early-type galaxies, we present a dynamical analysi…
Colour and stellar population gradients in galaxies
C. Tortora, N. R. Napolitano, V. F. Cardone +3
We discuss the colour, age and metallicity gradients in a wide sample of local SDSS early- and late-type galaxies. From the fitting of stellar population models we find that metall…
Stellar population gradients from cosmological simulations: dependence on mass and environment in local galaxies
C. Tortora, A. D. Romeo, N. R. Napolitano +4
The age and metallicity gradients for a sample of group and cluster galaxies from N-body+hydrodynamical simulation are analyzed in terms of galaxy stellar mass. Dwarf galaxies show…
Color and stellar population gradients in galaxies. Correlation with mass
C. Tortora, N. R. Napolitano, V. F. Cardone +3
We analyze the color gradients (CGs) of ~50000 nearby SDSS galaxies. From synthetic spectral models based on a simplified star formation recipe, we derive the mean spectral propert…
Extending the Hubble diagram by gamma ray bursts
L. Izzo, S. Capozziello, G. Covone +1
A new method to constrain the cosmological equation of state is proposed by using combined samples of gamma-ray bursts (GRBs) and supernovae (SNeIa). The Chevallier-Polarski-Linder…
Testing Dark Energy models vs CDM Cosmology by Supernovae and Gamma Ray Bursts
L. Izzo, S. Capozziello, G. Covone +1
A new method to constrain the cosmological equation of state is proposed by using combined samples of gamma-ray bursts (GRBs) and supernovae (SNeIa). The Chevallier-Polarski-Linder…
Central mass-to-light ratios and dark matter fractions in early-type galaxies
C. Tortora, N. R. Napolitano, A. J. Romanowsky +2
Dynamical studies of local ETGs and the Fundamental Plane point to a strong dependence of M/L ratio on luminosity (and stellar mass) with a relation of the form .…