论文标题
Codimension-2中的快捷方式Brane宇宙学中的GW170817
Shortcut in codimension-2 brane cosmology in light of GW170817
论文作者
论文摘要
在本文中，我们的宇宙被认为是嵌入在非策略六维抗DE保姆（ADS）时空中的Codimension-2 brane。我们在低成能量近似下得出了Brane的重力范围半径，这反映了额外的尺寸如何引起引力波的快捷效应（GWS）。我们还通过与GW170817/GRB 170817A的联合观察结果结合使用GW信号与电磁（EM）波信号之间的时间延迟，这给出了$ \ text {ads} _ {6} _ {6}^{〜} $ radius as $ radius as $ radius as $ radius as $ \ text {ADS} _ 3.84 \，\ text {mpc}^{2} _ {〜} $。对于高红移源，将时间延迟转换为源自GW信号的源红移与源自EM对应物的源红移之间的差异。已经发现，如果人们期望在合理的观察时间内检测到高红移GW事件的EM对应物，则需要对$ \ text {ads} _ {6} _ {6}^{〜} $ radius进行更强大的约束。我们的研究表明，$ \ text {ads} _ {6}^{〜} $ radius应该满足$ \ ell^{2} _ {〜} \ lysesim0.02 \，\ text {mpc}^{mpc}^{2} {2} {2} _ {〜} $ for decigo和bbo和bbo和bbo。
In this paper, our universe is regarded as a codimension-2 brane embedded in a noncompact six-dimensional Anti-de Sitter (AdS) spacetime. We derive the gravitational horizon radius on the brane under the low-energy approximation, which reflects how the extra dimensions cause the shortcut effect of gravitational waves (GWs). We also study the time delay between a GW signal and an electromagnetic (EM) wave signal in the low-redshift limit by combining with the joint observations of GW170817/GRB 170817A, which gives an upper limit to the $\text{AdS}_{6}^{~}$ radius as $\ell^{2}_{~} \lesssim 3.84\,\text{Mpc}^{2}_{~}$. For a high-redshift source, the time delay is converted into the discrepancy between the source redshift derived from the GW signal and the one derived from the EM counterpart. It is found that if one expects to detect the EM counterpart of a high-redshift GW event within a reasonable observation time, it requires a stronger constraint on the $\text{AdS}_{6}^{~}$ radius. Our research shows that the $\text{AdS}_{6}^{~}$ radius should satisfy $\ell^{2}_{~}\lesssim0.02\,\text{Mpc}^{2}_{~}$ for the DECIGO and BBO.
