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.


IPAC Authors


Yun Wang

Senior Scientist