Constraint on Cosmological Model with Matter Creation Using Type Ia Supernovae and Gamma-ray Bursts Observations
نویسندگان
چکیده
Using a collection of 12 γ-ray burst (GRBs) sample and 186 Type Ia supernovae (SNe Ia) data containing 157 gold and 29 silver set, we make constraints on the cosmological model with adiabatic matter creation, assuming a spatially flat universe. It is shown that the matter creation can also lead to accelerating expansion of the universe without a cosmological constant or any other dark energy component. Subject headings: cosmological parameters—cosmology: matter creation—observations— gamma-rays: bursts—supernovae
منابع مشابه
Dimming of Supernovae and Gamma Ray Busts by Compton Scattering and Its Cosmological Implications
Free electrons deplete photons from type Ia supernovae through the (inverse) Compton scattering. This Compton dimming increases with redshift and reaches 0.004 mag at z = 1 and 0.01 mag at z = 2. Although far from sufficient to invalidate the existence of dark energy, it can bias constraint on dark energy at a level non-negligible for future supernova surveys. This effect is correctable and sho...
متن کاملA Cosmology-independent Calibration of Gamma-ray Burst Luminosity Relations and the Hubble Diagram
An important concern in the application of gamma-ray bursts (GRBs) to cosmology is that the calibration of GRB luminosity/energy relations depends on the cosmological model, due to the lack of a sufficient lowredshift GRB sample. In this paper, we present a new method to calibrate GRB relations in a cosmologyindependent way. Since objects at the same redshift should have the same luminosity dis...
متن کاملMeasuring Dark Energy with Gamma-Ray Bursts and Other Cosmological Probes
It has been widely shown that the cosmological parameters and dark energy can be constrained by using data from type-Ia supernovae (SNe Ia), the cosmic microwave background (CMB) anisotropy, the baryon acoustic oscillation (BAO) peak from Sloan Digital Sky Survey (SDSS), the X-ray gas mass fraction in clusters, and the linear growth rate of perturbations at z = 0.15 as obtained from the 2dF Gal...
متن کاملConstraining dark energy with gamma - ray bursts
We use the cosmology-independent gamma-ray burst (GRB) distances of Wang (2008) to constrain dark energy cosmological model parameters. Current GRB data alone can not tightly constrain cosmological parameters and allow for a wide range of dark energy models. When used jointly with current Type Ia supernovae data and baryon acoustic peak measurements, the GRB data favor slightly lower values of ...
متن کاملA Cosmology Independent Calibration of GRB Luminosity Relations and the Hubble Diagram
An important issue related to the application of Gamma-Ray Bursts (GRBs) to cosmology is that the calibration of the luminosity relations of GRBs depends on the cosmological model due to the lack of sufficient low-redshift GRBs sample. In this paper, we present a new method to calibrate the GRB relations in a cosmological model independent way. Since sources at the same redshift should have the...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2005