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arXiv 1903.07652astro-ph.CO
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利用下一代宽视场成像巡天发现的Ia型超新星测试重力

Testing Gravity Using Type Ia Supernovae Discovered by Next-Generation Wide-Field Imaging Surveys

A. G. Kim, G. Aldering, P. Antilogus, A. Bahmanyar, S. BenZvi, H. Courtois, T. Davis, H. Feldman, S. Ferraro, S. Gontcho A Gontcho, O. Graur, R. Graziani, J. Gu… 展开作者

A. G. Kim, G. Aldering, P. Antilogus, A. Bahmanyar, S. BenZvi, H. Courtois, T. Davis, H. Feldman, S. Ferraro, S. Gontcho A Gontcho, O. Graur, R. Graziani, J. Guy, C. Harper, R. Hložek, C. Howlett, D. Huterer, C. Ju, P. -F. Leget, E. V. Linder, P. McDonald, J. Nordin, P. Nugent, S. Perlmutter, N. Regnault, M. Rigault, A. Shafieloo, A. Slosar, R. B. Tully, L. Wang, M. White, M. Wood-Vasey

摘要:

在未来的十年中,宽视场成像测量将使已确认的$z<0.3$ Ia型超新星(SNe~Ia)的数量从几百颗增加到几十万颗。SNe~Ia的数量密度和立体角覆盖范围的增加,以及它们绝对大小标准化的改进,现在使它们成为结构生长的竞争性探针,从而也成为引力的竞争性探针。速度功率谱对生长指数$γ$敏感,它通过$f=Ω_M^γ$关系反映了重力对结构线性生长的影响。我们提出了第一个预测的精度在$γ$的一系列现实SN特殊速度调查的情况。在接下来的十年里,SNe~Ia在局部$z<0.3$宇宙中的特殊速度将提供一种精确到$\pm 0.01$的$γ$测量,可以明确区分广义相对论和替代引力的主要模型。

英文摘要:

In the upcoming decade cadenced wide-field imaging surveys will increase the number of identified $z<0.3$ Type~Ia supernovae (SNe~Ia) from the hundreds to the hundreds of thousands. The increase in the number density and solid-angle coverage of SNe~Ia, in parallel with improvements in the standardization of their absolute magnitudes, now make them competitive probes of the growth of structure and hence of gravity. The peculiar velocity power spectrum is sensitive to the growth index $γ$, which captures the effect of gravity on the linear growth of structure through the relation $f=Ω_M^γ$. We present the first projections for the precision in $γ$ for a range of realistic SN peculiar-velocity survey scenarios. In the next decade the peculiar velocities of SNe~Ia in the local $z<0.3$ Universe will provide a measure of $γ$ to $\pm 0.01$ precision that can definitively distinguish between General Relativity and leading models of alternative gravity.

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。

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