TY - GEN AU - Verley, Simon AU - Verdes-Montenegro, L. AU - Combes, F. AU - Sabater, J. AU - Sulentic, J. AU - Bergond, G. AU - Espada Fernández, Daniel AU - García, E. AU - Lisenfeld , Ute AU - Odewahn, S. C. PY - 2007 SN - 0004-6361 SN - 1432-0746 UR - http://hdl.handle.net/10481/28400 AB - Context.The AMIGA project aims to build a well defined and statistically significant reference sample of isolated galaxies in order to estimate the environmental effects on the formation and evolution of galaxies. AB - Aims.The goal of this paper is to provide a measure of the environment of the isolated galaxies in the AMIGA sample, quantifying the influence of the candidate neighbours identified in our previous work and their potential effects on the evolution of... AB - Methods.Our starting sample is the Catalogue of Isolated Galaxies (CIG). We used two parameters to estimate the influence exerted by the neighbour galaxies on the CIG galaxy: the local number density of neighbour galaxies and the tidal strength... AB - Results.The CIG galaxies show a continuous spectrum of isolation, as quantified by the two parameters, from very isolated to interacting. The fraction of CIG galaxies whose properties are expected to be influenced by the environment is however low... AB - Conclusions.The environment of the galaxies in the CIG has been characterised, using two complementary parameters quantifying the isolation degree, the local number density of the neighbour galaxies and the tidal forces affecting the isolated... LA - eng PB - European Southern Observatory (ESO); Springer Verlag KW - Galaxies KW - Fundamental parameters KW - Formation KW - Evolution TI - The AMIGA sample of isolated galaxies: V Quantification of the isolation DO - 10.1051/0004-6361:20077481 ER -