Standard sirens and dark sector with Gaussian process

The gravitational waves from compact binary systems are viewed as a standard siren to probe the evolution of the universe. This paper summarizes the potential and ability to use the gravitational waves to constrain the cosmological parameters and the dark sector interaction in the Gaussian process methodology. After briefly introducing the method to reconstruct the dark sector interaction by the Gaussian process, the concept of standard sirens and the analysis of reconstructing the dark sector interaction with LISA are outlined. Furthermore, we estimate the constraint ability of the gravitational waves on cosmological parameters with ET. The numerical methods we use are Gaussian process and the Markov-Chain Monte-Carlo. Finally, we also forecast the improvements of the abilities to constrain the cosmological parameters with ET and LISA combined with the \it Planck.Comment: 10 pages, 8 figures, prepared for the proceedings of the International Conference on Gravitation : Joint Conference of ICGAC-XIII and IK1

1-Chloro­methyl-1,4-diazo­niabicyclo[2.2.2]octane tetra­chloridocuprate(II)

In the crystal structure of the title compound, (C7H15ClN2)[CuCl4], a weak inter­molecular N—H⋯Cl hydrogen bond is observed between the organic dication and the tetrahedral [CuCl4]2− anion. The organic dication is distorted, as indicated by the N—C—C—N torsion angles, which range from 16.76 (4) to 19.54 (3)°

2,4,6-Trimethyl­anilinium 2-carb­oxy­ethano­ate

The anion of the title molecular salt, C9H14N+·C3H3O4 −, features an intra­molecular O—H⋯O hydrogen bond. In the crystal, inter­molecular N—H⋯O inter­actions link each cation to three different anions

N-(2-Hy­droxy­benz­yl)adamantan-1-aminium bromide

There are two independent ion pairs in the asymmetric unit of the title compound, C17H24NO+·Br−. In the crystal, the ions are linked by inter­molecular N—H⋯Br and O—H⋯Br hydrogen bonds

catena-Poly[tris(2,4,6-trimethyl­anilinium) [(tetrachloridocadmium)-μ-chlorido]]

The asymmetric unit of the title compound, {(C9H14N)3[CdCl5]}n, comprises three 2,4,6-trimethyl­aniline dications and one half of the [Cd2Cl10]6− anion. The Cd atoms are each coordinated by six Cl atoms, with octa­hedra linked by bridging, apical Cl atoms, forming linear chains running parallel to the a axis. The trimethylanilinium cations form stacks between the chains of CdCl6 octa­hedra

Bis(2,4,6-trimethyl­anilinium) sulfate monohydrate

In the crystal structure of the title compound, 2C9H14N+·SO4 2−·H2O, the components are linked by inter­molecular N—H⋯O and O—H⋯O hydrogen bonds. N—H⋯S and O—H⋯S inter­actions also occur