LINEAR DARK ENERGY EQUATION OF STATE REVEALED BY SUPERNOVAE?

被引：4
|
作者：
Salzano, Vincenzo [1 ]
Wang, Yun [2 ]
Sendra, Irene [1 ]
Lazkoz, Ruth [1 ]
机构：
[1] Euskal Herriko Unibertsitatea, Zientzia Teknol Fak, Fis Teorikoaren Zientziaren Hist Saila, Bilbao 48080, Spain
[2] Univ Oklahoma, Homer L Dodge Dept Phys & Astron, Norman, OK 73019 USA
来源：
MODERN PHYSICS LETTERS A | 2014年 / 29卷 / 02期
关键词：
Dark energy theory; supernova type Ia - standard candles; COSMOLOGICAL CONSTANT; EXTENDED THEORIES; DYNAMICS; LAMBDA; PROBE;
D O I：
10.1142/S0217732314500084
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
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.
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页数：10
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