Weak lensing mass determinations

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

CORDOBA

Conferencia; COSMOSUR III; 2015

IFEG-CONICET, FAMAF, OAC

Weak lensing has proved to be an excellent technique for mass determination of astronomical 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 be measured are strongly affected by the atmosphere and the telescope effects. Hence, this technique has been mostly applied to galaxy clusters where the density is higher enough to get a reliable signal.\In this work we present the details of a pipeline for the weak lensing analysis of astronomical images. After testing it in simulated images, we applied it to a sample of low X-ray luminosity galaxy clusters. Also, it was generalized for the stacking analysis of low mass astronomical systems. We show the ongoing results of its application to compact galaxy groups and galaxy pairs.