8 papers
Characterising galaxy groups: spectroscopic observations of the Shakhbazyan sample
Diego Capozzi, Marilena Spavone, Silvio Barbati +3
Groups of galaxies are the most common cosmic structures. However, due to the poor statistics, projection effects and the lack of accurate distances, our understanding of their dyn…
Characterizing the nature of Fossil Groups with XMM
F. La Barbera, M. Paolillo, E. De Filippis +1
We present an X-ray follow-up, based on XMM plus Chandra, of six Fossil Group (FG) candidates identified in our previous work using SDSS and RASS data. Four candidates (out of six)…
The Luminosity Function of the NoSOCS Galaxy Cluster Sample
E. De Filippis, M. Paolillo, G. Longo +3
We present the analysis of the luminosity function of a large sample of galaxy clusters from the Northern Sky Optical Cluster Survey, using latest data from the Sloan Digital Sky S…
The Properties of the Heterogeneous Shakhbazyan Groups of Galaxies in the SDSS
D. Capozzi, E. De Filippis, M. Paolillo +2
We present a systematic study of the sub-sample of Shakhbazyan groups (SHKs) covered by the Sloan Digital Sky Survey Data Release--5 (SDSS-5). SHKs probe an environment with charac…
Modelling clusters of galaxies by f(R)-gravity
S. Capozziello, E. De Filippis, V. Salzano
We consider the possibility that masses and gravitational potentials of galaxy cluster, estimated at X-ray wavelengths, could be explained without assuming huge amounts of dark mat…
Cluster Geometry & Inclinations from Deprojection Uncertainties
Dalia Chakrabarty, Elisabetta De Filippis, Helen Russell
{The determination of cluster masses is a complex problem that would be aided by information about the cluster shape and orientation (along the line-of-sight).} {It is in this cont…