arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1602.09135astro-ph.HEastro-ph.COhep-ph
收藏

快速射电暴的光子质量极限

Photon Mass Limits from Fast Radio Bursts

Luca Bonetti, John Ellis, Nikolaos E. Mavromatos, Alexander S. Sakharov, Edward K. G. Sarkisyan-Grinbaum, Alessandro D. A. M. Spallicci

摘要:

快速射电暴(FRB)中的频率依赖性时间延迟可以用来限制光子质量,如果FRB红移是已知的,但由于等离子体效应和光子质量的色散的频率依赖性之间的相似性复杂的推导$m_γ$的限制。FRB 150418的色散测量(DM)已知为$\sim 0.1$ %,并且有人声称已经以$\sim 2$ %的精度测量了它的红移,但是对$m_γ$的约束的强度受到宿主星系和银河系建模的不确定性以及星系际介质(IGM)中可能的不均匀性的限制。考虑到这些不确定性,最近关于FRB 150418的数据表明,如果FRB 150418确实如最初报道的那样具有红移$z = 0.492$,则$m_γ\lesssim 1.8 \times 10^{-14}$ eV c $^{-2}$($3.2 \times 10^{-50}$ kg)。在未来,不同的红移依赖的等离子体和光子的质量贡献DM可以用来提高灵敏度$m_γ$,如果更多的FRB红移测量。对于银河系外对FRB DM贡献的固定分数不确定性,具有较低红移的FRB将提供对$m_γ$更高的灵敏度。

英文摘要:

The frequency-dependent time delays in fast radio bursts (FRBs) can be used to constrain the photon mass, if the FRB redshifts are known, but the similarity between the frequency dependences of dispersion due to plasma effects and a photon mass complicates the derivation of a limit on $m_γ$. The dispersion measure (DM) of FRB 150418 is known to $\sim 0.1$%, and there is a claim to have measured its redshift with an accuracy of $\sim 2$%, but the strength of the constraint on $m_γ$ is limited by uncertainties in the modelling of the host galaxy and the Milky Way, as well as possible inhomogeneities in the intergalactic medium (IGM). Allowing for these uncertainties, the recent data on FRB 150418 indicate that $m_γ\lesssim 1.8 \times 10^{-14}$eV c$^{-2}$ ($3.2 \times 10^{-50}$kg), if FRB 150418 indeed has a redshift $z = 0.492$ as initially reported. In the future, the different redshift dependences of the plasma and photon mass contributions to DM can be used to improve the sensitivity to $m_γ$ if more FRB redshifts are measured. For a fixed fractional uncertainty in the extra-galactic contribution to the DM of an FRB, one with a lower redshift would provide greater sensitivity to $m_γ$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑