Weak lensing mass determinations

ELIZABETH JOHANA GONZALE; GAEL FOËX; DIEGO GARCÍA LAMBAS; MARIANO DOMINGUEZ; OSVALDO M. MORESCHI; EMANUEL GALLO; JOSÉ LUIS NILO CASTELLÓN; MARÍA VICTORIA ALONSO; MARTÍN CHALELA

Córdoba

Congreso; CosmoSur III; 2015

Weak lensing has proved to be an excellent technique for mass determination of astro-nomical systems since it is sensitive to baryonic and non-baryonic matter. Nevertheless,detecting weak lensing signal is a great challenge since the distortions that need to bemeasured are strongly affected by the atmosphere and the telescope effects. Hence, thistechnique has been mostly applied to galaxy clusters where the density is higher enoughto get a reliable signal.In this work we present the details of a pipeline for the weak lensing analysis of astronom-ical images. After testing it in simulated images, we applied it to a sample of low X-rayluminosity galaxy clusters. Also, it was generalized for the stacking analysis of low massastronomical systems. We show the ongoing results of its application to compact galaxygroups and galaxy pairs.