Linear Dark Energy Equation of State Revealed by Supernovae?

January 2014 • 2014MPLA...2950008S

Authors • Salzano, Vincenzo • Wang, Yun • Sendra, Irene • Lazkoz, Ruth

Abstract • In this paper, we propose a test to detect the linearity of the dark energy equation of state, and apply it to the SNLS3 Type Ia Supernova (SN Ia) data set. We find that: (a) current SN Ia data are well described by a dark energy equation of state linear in the cosmic scale factor a, at least up to a redshift z = 1, independent of the pivot points chosen for the linear relation; (b) there is no significant evidence of any deviation from linearity. This apparent linearity may reflect the limit of dark energy information extractable from current SN Ia data.

Links

• PDF https://www.worldscientific.com/doi/pdf/10.1142/S0217732314500084
• PREPRINT http://arxiv.org/abs/1211.1012
• ELECTR https://doi.org/10.1142%2FS0217732314500084