2010/08/14 by Molin Liu, Benhai Yu, Ru-Min Wang +2 · 3 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Classical mechanics #Constant (computer programming) #Cosmological constant #Cosmology #Cosmology and Gravitation Theories #Dark energy #Energy condition #Galaxies: Formation, Evolution, Phenomena #General relativity #Geometry #Gravitation #Massless particle #Mathematical physics #Physics #Quantum electrodynamics #Quantum mechanics #Quintessence #Scalar (mathematics) #Scalar field #Schwarzschild radius #gr-qc #hep-ph #hep-th
paper · pdf · doi:10.1142/s0217732310033621
published in Modern Physics Letters A 25(28), 2431-2445 (World Scientific) · 12 pages, 6 figures
arxiv created 2010/08/14 · openalex publication_date 2010/08/19 · arxiv updated 2014/11/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study the absorption and scattering of massless scalar waves propagating in spherically symmetric spacetimes with dynamical cosmological constant both in low-energy and high-energy zones. In the former low-energy regime, we solve analytically the Regge–Wheeler wave equation and obtain an analytic absorption probability expression which varies with [Formula: see text], where M is the central mass and Λ is cosmological constant. The low-energy absorption probability, which is in the range of [0, 0.986701], increases monotonically with increase in Λ. In the latter high-energy regime, the scalar particles adopt their geometric optics limit value. The trajectory equation with effective potential emerges and the analytic high-energy greybody factor, which is relevant with the area of classically accessible regime, also increases monotonically with increase in Λ, as long Λ is less than or of the order of 10 4 . In this high-energy case, the null cosmological constant result reduces to the Schwarzschild value [Formula: see text].