Current data on the globular cluster Palomar 14 are not inconsistent with MOND (2009)
Gentile, Gianfranco, Famaey, Benoit, Angus, Garry W., Kroupa, Pavel
Certain types of globular clusters have the very important property that the predictions for their kinematics in the Newtonian and modified Newtonian dynamics (MOND) contexts are divergent. Here, we...
Universality of galactic surface densities within one dark halo scale-length (2009)
Gentile, Gianfranco, Famaey, Benoit, Zhao, HongSheng, Salucci, Paolo
It was recently discovered that the mean dark matter surface density within one dark halo scale length - the radius within which the volume density profile of dark matter remains approximately flat -...
The Galactic potential and the asymmetric distribution of hypervelocity stars (2008)
Perets, Hagai B., Wu, Xufen, Zhao, HongSheng, Famaey, Benoit, Gentile, Gianfranco, Alexander, Tal
In recent years several hypervelocity stars (HVSs) have been observed in the halo of our Galaxy. Such HVSs have possibly been ejected from the Galactic center and then propagated in the Galactic...
MOND and the Universal Rotation Curve: similar phenomenologies (2008)
The Modified Newtonian Dynamics (MOND) and the Universal Rotation Curve (URC) are two ways to describe the general properties of rotation curves, with very different approaches concerning dark matter...
Milky Way potentials in CDM and MOND. Is the Large Magellanic Cloud on a bound orbit? (2008)
Wu, Xufen, Famaey, Benoit, Gentile, Gianfranco, Perets, Hagai, Zhao, HongSheng
We compute the Milky Way potential in different cold dark matter (CDM) based models, and compare these with the modified Newtonian dynamics (MOND) framework. We calculate the axis ratio of the...
Active galactic nuclei-induced cavities in NGC 1399 and NGC 4649 (2008)
SHURKIN, K, DUNN, RJH, Gentile, Gianfranco, TAYLOR, GB, ALLEN, SW
Dark Matter in Gas-Rich Dwarf Galaxies (2008)
KLEIN, U, Gentile, Gianfranco, SALUCCI, P, JOZSA, G, KENN, F
Comment on "Scalar-tensor gravity coupled to a global monopole and flat rotation curves" (2007)
Salucci, Paolo, Gentile, Gianfranco
The recent paper by Lee and Lee [Phys. Rev. D 69, 127502 (2004)] may strongly leave the impression that astronomers have established that the rotation curves of spiral galaxies are flat. We show that...
On the radio properties of the highest redshift quasars (2007)
Cirasuolo, Michele, Magliocchetti, Manuela, Gentile, Gianfranco, Celotti, Annalisa, Cristiani, Stefano, Danese, Luigi
We present deep radio observations of the most distant complete quasar sample drawn from the Sloan Digital Sky Survey. Combining our new data with those from literature we obtain a sample which is...
NGC 3741: the dark halo profile from the most extended rotation curve (2007)
Gentile, Gianfranco, Salucci, Paolo, Klein, Uli, Granato, Gian Luigi
We present new HI observations of the nearby dwarf galaxy NGC 3741. This galaxy has an extremely extended HI disk, which allows us to trace the rotation curve out to unprecedented distances in terms...
Salucci, Paolo, Lapi, Andrea, Tonini, Chiara, Gentile, Gianfranco, Yegorova, Irina A., Klein, Uli
In the current LambdaCDM cosmological scenario, N-body simulations provide us with a Universal mass profile, and consequently a Universal equilibrium circular velocity of the virialized objects, as...
LambdaCDM halo density profiles: where do actual halos converge to NFW ones? (2007)
Gentile, Gianfranco, Tonini, Chiara, Salucci, Paolo
Aims. We present an analysis of 37 high-quality extended rotation curves that highlights the existence of a new discrepancy (or a new aspect of an old discrepancy) between the density profiles...
LambdaCDM Halo Density Profiles: where do actual halos converge to NFW ones? (2007)
Gentile, Gianfranco, Tonini, Chiara, Salucci, Paolo
Aims. We present an analysis of 37 high-quality extended rotation curves that highlights the existence of a new discrepancy (or a new aspect of an old discrepancy) between the density profiles...
Fields and filaments in the core of the Centaurus cluster (2007)
TAYLOR, GB, FABIAN, AC, Gentile, Gianfranco, ALLEN, SW, CRAWFORD, C, SANDERS, JS
Insight into the baryon-gravity relation in galaxies (2006)
Famaey, Benoit, Gentile, Gianfranco, Bruneton, Jean-Philippe, Zhao, HongSheng
Observations of spiral galaxies strongly support a one-to-one analytical relation between the inferred gravity of dark matter at any radius and the enclosed baryonic mass. It is baffling that baryons...
The v_c-sigma_c relation in low mass and low surface brightness galaxies (2006)
Buyle, Pieter, Ferrarese, Laura, Gentile, Gianfranco, Dejonghe, Herwig, Baes, Maarten, Klein, Ulrich
We present an updated investigation of the relation between large scale disk circular velocity, v_c, and bulge velocity dispersion, sigma_c. New bulge velocity dispersions are measured for a sample...
Beyond the sphericity assumption in dynamical HI models (2004)
Buyle, Pieter, Dejonghe, Herwig, Gentile, Gianfranco
It is generally agreed that the rotational velocities of spiral galaxies indicate that a lot of matter is unseen. Hitherto, the majority of these mass models are all based on spherical symmetry,...
Observational evidence for a connection between SMBHs and dark matter haloes (2004)
Baes, Maarten, Dejonghe, Herwig, Buyle, Pieter, Ferrarese, Laura, Gentile, Gianfranco
We investigate the relation between circular velocity vc and bulge velocity dispersion sigma in spiral galaxies, based on literature data and new spectroscopic observations. We find a strong, nearly...
The line-of-sight warp of the spiral galaxy ESO 123-G23 (2003)
Gentile, Gianfranco, Fraternali, F., Klein, Uli, Salucci, Paolo
We present 3-D modelling of the distribution and kinematics of the neutral hydrogen in the spiral galaxy ESO 123-G23. The optical appearance of this galaxy is an almost perfectly edge-on disk, while...