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Constraint on cosmological model with matter creation using complementary astronomical observations
Authors:Yuan Qiang  Tong-Jie Zhang  Ze-Long Yi
Affiliation:(1) Department of Astronomy, Beijing Normal University, Beijing, 100875, People’s Republic of China;(2) Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, P.O. Box 918-3, Beijing, 100049, People’s Republic of China
Abstract:The universe with adiabatic matter creation is considered. It is thought that the negative pressure caused by matter creation can play the role of a dark energy component, and drive the accelerating expansion of the universe. Using the Type Ia supernovae (SNe Ia) data, the observational Hubble parameter data, the Cosmic Microwave Background (CMB) data and the Baryonic Acoustic Oscillation (BAO) data, we make constraints on the cosmological parameters, assuming a spatially flat universe. Our results show that the model with matter creation is consistent with the SNe Ia data, while the joint constraints of all these observational data disfavor this model. If the cosmological constant is taken into account, a traditional model without matter creation is favored by the joint observations.
Keywords:Matter creation cosmology  Observational constraints  Supernovae
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