Constraints from the time lag between gravitational waves and gamma rays: Implications of GW170817 and GRB 170817A

被引：26

作者：

Shoemaker, Ian M. ^{[1
]}

Murase, Kohta ^{[2
,3
,4
,5
]}

机构：

[1] Univ South Dakota, Dept Phys, Vermillion, SD 57069 USA

[2] Penn State Univ, Dept Phys, 104 Davey Lab, University Pk, PA 16802 USA

[3] Penn State Univ, Dept Astron & Astrophys, 525 Davey Lab, University Pk, PA 16802 USA

[4] Penn State Univ, Ctr Particle & Gravitat Astrophys, University Pk, PA 16802 USA

[5] Kyoto Univ, Yukawa Inst Theoret Phys, Kyoto 6068502, Japan

来源：

PHYSICAL REVIEW D | 2018年 / 97卷 / 08期

基金：

美国国家科学基金会;

关键词：

EQUIVALENCE PRINCIPLE; NEUTRINOS; MASS;

D O I：

10.1103/PhysRevD.97.083013

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Laser Interferometer Gravitational-Wave Observatory (LIGO) has recently discovered gravitational waves (GWs) from its first neutron star-neutron star merger at a distance of similar to 40 Mpc from the Earth. The associated electromagnetic (EM) detection of the event, including the short gamma-ray burst within Delta t similar to 2 s after the GW arrival, can be used to test various aspects of sources physics and GW propagation. Using GW170817 as the first GW-EM example, we show that this event provides a stringent direct test that GWs travel at the speed of light. The gravitational potential of the Milky Way provides a potential source of Shapiro time delay difference between the arrival of photons and GWs, and we demonstrate that the nearly coincident detection of the GW and EM signals can yield strong limits on anomalous gravitational time delay, through updating the previous limits taking into account details of Milky Way's gravitational potential. Finally, we also obtain an intriguing limit on the size of the prompt emission region of GRB 170817A, and discuss implications for the emission mechanism of short gamma-ray bursts.

引用

页数：6

共 44 条

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