TY - JOUR AU - Olmo, G. J. AU - Rubiera-Garcia, D. AU - Wojnar, A. PY - 2019 DA - 2019// TI - Minimum main sequence mass in quadratic Palatini f(R) gravity T2 - Phys. Rev. D JO - Physical Review D SP - 044020 EP - 9pp VL - 100 IS - 4 PB - Amer Physical Soc AB - General relativity yields an analytical prediction of a minimum required mass of roughly similar to 0.08-0.09 M-circle dot for a star to stably burn sufficient hydrogen to fully compensate photospheric losses and, therefore, to belong to the main sequence. Those objects below this threshold ( brown dwarfs) eventually cool down without any chance to stabilize their internal temperature. In this work we consider quadratic Palatini f(R) gravity and show that the corresponding Newtonian hydrostatic equilibrium equation contains a new term whose effect is to introduce a weakening/strengthening of the gravitational interaction inside astrophysical bodies. This fact modifies the general relativity prediction for this minimum main sequence mass. Through a crude analytical modeling we use this result in order to constraint a combination of the quadratic f(R) gravity parameter and the central density according to astrophysical observations. SN - 2470-0010 UR - https://arxiv.org/abs/1906.04629 UR - https://doi.org/10.1103/PhysRevD.100.044020 DO - 10.1103/PhysRevD.100.044020 LA - English N1 - WOS:000480390800009 ID - Olmo_etal2019 ER -