论文标题
黑星系和自旋偏置的分布
The distribution of dark galaxies and spin bias
论文作者
论文摘要
鉴于从苜蓿和小事调查中发现了许多（几乎）的深色星系，我们重新审视了Jimenez等人的预测。 1997年，基于快速旋转气盘的稳定性。我们已经使用Planck18给出的参数更新了$λ$ CDM的预测，计算深色对象的预期数密度及其旋转参数和质量分布。与数据相比更具挑战性，但是在更可靠地确定旋转的情况下，根据Toomre Criterion，旋转接近磁盘稳定的阈值，在Toomre Criterion中，预期数量密度最高，并增强了以下概念，即基于其父母的旋转旋转的发光星系存在偏见。
In the light of the discovery of numerous (almost) dark galaxies from the ALFALAFA and LITTLE THINGS surveys, we revisit the predictions of Jimenez et al. 1997, based on the Toomre stability of rapidly-spinning gas disks. We have updated the predictions for $Λ$CDM with parameters given by Planck18, computing the expected number densities of dark objects, and their spin parameter and mass distributions. Comparing with the data is more challenging, but where the spins are more reliably determined, the spins are close to the threshold for disks to be stable according to the Toomre criterion, where the expected number density is highest, and reinforces the concept that there is a bias in the formation of luminous galaxies based on the spin of their parent halo.
