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Publication
Featured researches published by E. Escalera.
The Astrophysical Journal | 1994
E. Escalera; A. Biviano; M. Girardi; G. Giuricin; F. Mardirossian; A. Mazure; M. Mezzetti
The analysis of the presence of substructures in 16 well-sampled clusters of galaxies suggests a stimulating hypothesis: Clusters could be classified as unimodal or bimodal, on the basis of to the sub-clump distribution in the {\em 3-D} space of positions and velocities. The dynamic study of these clusters shows that their fundamental characteristics, in particular the virial masses, are not severely biased by the presence of subclustering if the system considered is bound.The analysis of the presence of substructures in 16 well-sampled clusters of galaxies suggests a stimulating hypothesis: Clusters could be classified as unimodal or bimodal, on the basis of to the sub-clump distribution in the {\em 3-D} space of positions and velocities. The dynamic study of these clusters shows that their fundamental characteristics, in particular the virial masses, are not severely biased by the presence of subclustering if the system considered is bound.
The Astrophysical Journal | 1992
E. Escalera; A. Mazure
A new multiscale technique, the wavelet transform, is applied to the study of subclustering in clusters of galaxies dealing with two-dimensional or three-dimensional data. The performance of the method is shown on a set of toy models and the statistical validity of the results is discussed for both two-dimensional and three-dimensional cases. Application to the cluster A754 confirms the presence of subclustering in this system
Astrophysics | 1995
A. Mazure; P. Katgert; R. den Hartog; A. Biviano; P. Dubath; E. Escalera; P. Focardi; Daniel Gerbal; G. Giuricin; Bernard J. T. Jones; O. Le Fèvre; M. Moles; J. Perea; George Rhee
A statistically reliable distribution of velocity dispersions free from biases and systematic errors for a sample of ACO clusters is obtained. This distribution is compared with other data and model predictions.
Astrophysical Letters & Communications | 1997
G. Giuricin; A. Biviano; A. Mazure; P. Katgert; J. Perea; M. Moles; P. Focardi; Roland Hendrik den Hartog; Olivier Le Fevre; P. Dubath; Daniel Gerbal; E. Escalera; George Rhee; William D. Jones
Astronomy and Astrophysics | 1996
P. Katgert; A. Mazure; J. Perea; R. den Hartog; M. Moles; O. Le Fèvre; P. Dubath; P. Focardi; George Rhee; Bernard J. T. Jones; E. Escalera; A. Biviano; Daniel Gerbal; G. Giuricin
Astronomy and Astrophysics | 1996
A. Mazure; P. Katgert; R. den Hartog; A. Biviano; P. Dubath; E. Escalera; P. Focardi; Daniel Gerbal; G. Giuricin; Bernard J. T. Jones; O. Le Fèvre; M. Moles; J. Perea; George Rhee
Dark and Visible Matter in Galaxies and Cosmological Implications | 1997
D. Fadda; M. Girardi; G. Giuricin; F. Mardirossian; M. Mezzetti; E. Escalera
Dark and Visible Matter in Galaxies and Cosmological Implications | 1997
M. Girardi; D. Fadda; G. Giuricin; F. Mardirossian; M. Mezzetti; E. Escalera
Archive | 1996
P. Katgert; A. Mazure; J. Perea; Roland Hendrik den Hartog; Michael Moles; Olivier Le Fevre; P. Dubath; P. Focardi; George Rhee; Bernard J. T. Jones; E. Escalera; A. Biviano; Daniel Gerbal; G. Giuricin
Archive | 1996
A. Mazure; P. Katgert; Roland Hendrik den Hartog; A. Biviano; P. Dubath; E. Escalera; P. Focardi; Daniel Gerbal; G. Giuricin; Bernard J. T. Jones; Olivier Le Fevre; Michael Moles; J. Perea; George Rhee
