Mass density profiles at kiloparsec scales using the sub-millimetre galaxies magnification bias

• DOI: 10.48550/arxiv.2403.01990
• Publication Date: 2024-03-04
• Authors: D. Crespo; J. González-Nuevo; L. Bonavera; M. M. Cueli; J. M. Casas

Gravitational lensing is a powerful tool for studying the distribution of mass in Universe. Understanding magnification bias effect gravitational and its impact on flux sub-millimetre galaxies (SMGs) crucial accurate interpretations observational data. This study aims to investigate analyse density profiles different types foreground lenses, including quasi-stellar objects, galaxies, clusters. The specific goals are compare lens types, assess angular resolution analysis, determine adequacy theoretical explaining observed data, using four profiles. was estimated cross-correlation function between positions background SMGs samples. Stacking techniques were employed enhance signal at smaller separations, more precise from WISE catalogue utilised improve positional accuracy. measurements revealed distinctive central excess outer power-law profiles, with lack intermediate region. analysis indicated limitations selected profiles' ability explain highlighting need additional considerations. results suggest presence isolated galactic halos importance considering environmental factors close satellites future investigations. derived masses best-fit parameters contribute our understanding systems provide constraints nature galaxies. Notably, intriguing around 10 arcsec challenges current calls further quantitative confirmation feature.