BELLAZZINI, MicheleMicheleBELLAZZINIFerraro, F. R.F. R.FerraroSOLLIMA, ANTONIO LUIGIANTONIO LUIGISOLLIMAPANCINO, ELENAELENAPANCINOORIGLIA, LiviaLiviaORIGLIA2023-01-192023-01-1920040004-6361http://hdl.handle.net/20.500.12386/32929New empirical calibrations of the Red Giant Branch Tip in the I,J,H and K bands based on two fundamental pillars, namely omega Centauri and 47 Tucanae, have been obtained by using a large optical and near infrared photometric database. Our best estimates give M_I(TRGB)= -4.05 pm 0.12, M_J(TRGB)= -5.20 pm 0.16, M_H(TRGB)= -5.94 pm 0.18 and M_K(TRGB) = -6.04 pm 0.16 at [M/H]=-1.5 (omega Cen) and M_I(TRGB)= -3.91 pm 0.13, M_J(TRGB)= -5.47 pm 0.25, M_H(TRGB)= -6.35 pm 0.30 and M_K(TRGB)= -6.56 pm 0.20 at [M/H]=-0.6 (47 Tuc). With these new empirical calibrations we also provide robust relations of the TRGB magnitude in I, J, H and K bands as a function of the global metallicity ([M/H]). It has also been shown that our calibrations self-consistently provide a distance modulus of the Large Magellanic Cloud in good agreement with the standard value ((m-M)_0 = 18.50)).STAMPAenArticle10.1051/0004-6361:200359102-s2.0-4444271613https://www.aanda.org/articles/aa/abs/2004/34/aa0910/aa0910.htmlhttp://arxiv.org/abs/astro-ph/0404572v2FIS/05 - ASTRONOMIA E ASTROFISICAERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation