Higher signal harmonics, LISA's angular resolution, and dark energy

被引：100

作者：

Arun, K. G. ^{[1
]}

Iyer, Bala R.

Sathyaprakash, B. S.

Sinha, Siddhartha

Van den Broeck, Chris

机构：

[1] Univ Paris 11, CNRS, IN2P3, LAL, F-91405 Orsay, France

[2] CNRS, Inst Astrophys, GReCO, Paris, France

[3] Raman Res Inst, Bangalore 560080, Karnataka, India

[4] Cardiff Univ, Sch Phys & Astron, Cardiff CF24 3YB, Wales

[5] Indian Inst Sci, Dept Phys, Bangalore 560012, Karnataka, India

来源：

PHYSICAL REVIEW D | 2007年 / 76卷 / 10期

基金：

英国科学技术设施理事会;

关键词：

D O I：

10.1103/PhysRevD.76.104016

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

It is generally believed that the angular resolution of the Laser Interferometer Space Antenna (LISA) for binary supermassive black holes (SMBH) will not be good enough to identify the host galaxy or galaxy cluster. This conclusion, based on using only the dominant harmonic of the binary SMBH signal, changes substantially when higher signal harmonics are included in assessing the parameter estimation problem. We show that in a subset of the source parameter space the angular resolution increases by more than a factor of 10, thereby making it possible for LISA to identify the host galaxy/galaxy cluster. Thus, LISA's observation of certain binary SMBH coalescence events could constrain the dark energy equation of state to within a few percent, comparable to the level expected from other dark energy missions.

引用

页数：14

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