InterestsGravitational Waves, Cosmology, Dark Energy, Black Holes, Gravitational waves
Research statementCosmology is on the brink of a paradigm shift. Old and new fundamental questions such as the nature of the dark fields, the Hubble tension, the old cosmological constant problem, among others, are compelling scientists to reexamine the theoretical cornerstones of the field such as the cosmological principle and general relativity itself in light of cosmological data. This urges cosmologists to keep an open mind to the multitude of theories that may potentially shed light on the aforementioned cosmic puzzles. On this background, I look out for dark energy models that pick up on irreplaceable features of general relativity such as gravitational waves all while showcasing novel, testable astrophysical and cosmological predictions. These models collectively go by alternative gravity (also often modified gravity) in the literature. My work is devoted to an examination of these models at distances of a few kilometers, a.k.a. typical size of a black hole, to much larger scales relevant to the expansion of and structure formation in the observable Universe. |
Education |
Publications
2022 (highlights: pulsar timing array cosmology)
- R. C. Bernardo & You-Ru Lee. Hubble constant by natural selection: Evolution chips in the Hubble tension. arXiv:2212.02203. Under review.
- R. C. Bernardo, D. Grandon, J. Levi Said, V. H. Cardenas. Dark energy by natural evolution: Constraining dark energy using Approximate Bayesian Computation. arXiv:2211.05482. Under review.
- R. C. Bernardo and K.-W. Ng, Pulsar and cosmic variances of pulsar timing-array correlation measurements of the stochastic gravitational wave background. Journal of Cosmology and Astroparticle Physics, 2022, (11) 046. arXiv:2209.14834.
- R. C. Bernardo and K.-W. Ng, Stochastic gravitational wave background phenomenology in a pulsar timing array. Physical Review D, 107, 044007. arXiv:2208.12538.
- K. H. A. Villegas and R. C. Bernardo, Quantum and higher curvature corrections to the anti-de Sitter black hole. arXiv:2208.07663. Under review.
- R. C. Bernardo and K.-W. Ng, Looking out for the Galileon in the nanohertz gravitational wave sky. arXiv:2206.01056. Under review.
- R. C. Bernardo and C.-Y. Chen, Dressed black holes in the new tensor-vector-scalar theory. General Relativity and Gravitation, 55, 23 (2023). arXiv:2202.08460.
- S. Appleby and R. C. Bernardo, Tadpole Cosmology: Self Tuning Without Degeneracy. Journal of Cosmology and Astroparticle Physics, 2022, (07) 035. arXiv:2202.08672.
- R. C. Bernardo, C.-Y. Chen, J. Levi Said, and Y.-H. Kung, Confronting quantum-corrected teleparallel cosmology with observations. Journal of Cosmology and Astroparticle Physics, 2022, (04) 052. arXiv:2111.11761.
- C.J. Palpal-latoc, R. C. Bernardo, I. Vega. Testing time-delayed cosmology. European Physical Journal C, 82, 1148. arXiv:2111.10742.
- R. C. Bernardo, D. Grandon, J. Levi Said, V. H. Cardenas. Parametric and nonparametric methods hint dark energy evolution. Physics of the Dark Universe, 36, 101017. arXiv:2111.08289.
- R. C. Bernardo. Inflationary quantum dynamics and backreaction using a classical-quantum correspondence. European Physical Journal C, 81, 994. arXiv:2109.08508.
- R. C. Bernardo, J. Levi Said, M. Caruana, and S. Appleby. Well-tempered Minkowski solutions in teleparallel Horndeski theory. Classical and Quantum Gravity, 39, 015013. arXiv:2108.02500.
- R. C. Bernardo, J. Levi Said, M. Caruana, and S. Appleby. Well-tempered teleparallel Horndeski cosmology: a teleparallel variation to the cosmological constant problem. Journal of Cosmology and Astroparticle Physics, 2021, (10) 078. arXiv:2107.08762.
- R. C. Bernardo and J. Levi Said. Towards a model-independent reconstruction approach for late-time Hubble data. Journal of Cosmology and Astroparticle Physics, 2021, (08) 027, arXiv:2106.08688.
- R. C. Bernardo and J. Levi Said. A data-driven Reconstruction of Horndeski gravity via the Gaussian processes. Journal of Cosmology and Astroparticle Physics, 2021, (09) 014, arXiv:2105.12970.
- R. C. Bernardo. 2021. Gravitational wave signatures from dark sector interactions. Physical Review D, 104, 024070, arXiv:2103.02311.
- R. C. Bernardo. 2021. Self-tuning kinetic gravity braiding: Cosmological dynamics, shift symmetry, and the tadpole. Journal of Cosmology and Astroparticle Physics, 2021, (03) 079, arXiv:2101.00965.
- R. C. Bernardo and I. Vega. 2021. Stealth black hole perturbations in kinetic gravity braiding. Journal of Mathematical Physics, 62, 072501, arXiv:2007.06006.
- R. C. Bernardo, J. Celestial and I. Vega. 2020. Stealth black holes in shift symmetric kinetic gravity braiding. Physical Review D, 101, 024036, arXiv:1911.01847.
- R. C. Bernardo and I. Vega. 2019. Tailoring cosmologies in shift-symmetric cubic Horndeski gravity. Journal of Cosmology and Astroparticle Physics, 2019, (10) 058, arXiv:1903.12578.
- R. C. Bernardo and I. Vega. 2019. Hair-dressing Horndeski: An approach for obtaining hairy solutions in cubic Horndeski gravity. Physical Review D, 99, 124049, arXiv:1902.04988.
- R. C. S. Bernardo and J. P. H. Esguerra. 2018. Maximally-localized position, Euclidean path-integral, and thermodynamics in GUP quantum mechanics. Annals of Physics, 391, 293-311.
- R. C. S. Bernardo and J. P. H. Esguerra. 2017. Euclidean path integral formalism in deformed space with minimum measurable length. Journal of Mathematical Physics, 58, 042103.
- P. C. S. Cruz, R. C. S. Bernardo, and J. P. H. Esguerra. 2017. Energy levels of a quantum particle on a cylindrical surface with non-circular cross-section in electric and magnetic fields. Annals of Physics, 379, 159-174.
- R. C. S. Bernardo and J. P. H. Esguerra. 2016. Quantum scattering in one-dimensional systems satisfying the minimal length uncertainty relation. Annals of Physics, 375, 444-459.
- R. C. S. Bernardo and J. P. H. Esguerra. 2016. Energy levels of one-dimensional systems satisfying the minimal length uncertainty relation. Annals of Physics, 373, 521-531.
- J. P. Esguerra, R. C. Bernardo, J. D. Vallejos, and J. J. Canda. 2015. Reply to Comment on ‘Wind-influenced projectile motion’. European Journal of Physics, 36, 068004.
- R. C. S. Bernardo and J. P. H. Esguerra. 2015. Exactly Solvable Dynamical Models with a Minimal Length Uncertainty. Few-Body Systems. 56, 219-229. arXiv:1602.02240.
- R. C. Bernardo, J. P. H. Esguerra, J. D. Vallejos, and J. J. Canda. 2015. Wind-influenced projectile motion. European Journal of Physics. 36, 025016.
- R. C. S. Bernardo and C. P. Palisoc. 2014. Wronskian method for bound state central force problem. European Journal of Physics. 35, 035024.