Generalized virial theorem in f(R) gravity Export

@article{citeulike:3080304, abstract = {We generalize the virial theorem in f(R) modified gravity using the collisionless Boltzmann equation. We find supplementary geometric terms in the modified Einstein equation providing an effective contribution to the gravitational energy. The total virial mass is proportional to the effective mass associated with the new geometrical term, which may account for the well-known virial theorem mass discrepancy in clusters of galaxies. The model predicts that the geometric mass and its effects extend beyond the virial radius of the clusters. We also consider the behavior of the galaxy cluster velocity dispersion in f(R) models. Thus, the f(R) virial theorem can be an efficient tool in observationally testing the viability of this class of generalized gravity models.}, archivePrefix = {arXiv}, author = {Boehmer, Christian G. and Harko, Tiberiu and Lobo, Francisco S. N.}, citeulike-article-id = {3080304}, citeulike-linkout-0 = {http://arxiv.org/abs/0710.0966}, citeulike-linkout-1 = {http://arxiv.org/pdf/0710.0966}, day = {1}, eprint = {0710.0966}, keywords = {gr, lss, peculiar\_vel, virial}, month = {Mar}, posted-at = {2008-08-04 08:48:39}, priority = {2}, title = {Generalized virial theorem in f(R) gravity}, url = {http://arxiv.org/abs/0710.0966}, year = {2008} }

TY - JOUR ID - citeulike:3080304 L3 - citeulike-article-id:3080304 N2 - We generalize the virial theorem in f(R) modified gravity using the collisionless Boltzmann equation. We find supplementary geometric terms in the modified Einstein equation providing an effective contribution to the gravitational energy. The total virial mass is proportional to the effective mass associated with the new geometrical term, which may account for the well-known virial theorem mass discrepancy in clusters of galaxies. The model predicts that the geometric mass and its effects extend beyond the virial radius of the clusters. We also consider the behavior of the galaxy cluster velocity dispersion in f(R) models. Thus, the f(R) virial theorem can be an efficient tool in observationally testing the viability of this class of generalized gravity models. TI - Generalized virial theorem in f(R) gravity KW - gr KW - lss KW - peculiar_vel KW - virial AU - Boehmer, Christian AU - Harko, Tiberiu AU - Lobo, Francisco PY - 2008/Mar/01/ UR - http://arxiv.org/abs/0710.0966 ER -