Linear momentum flux from inspiralling compact binaries in quasielliptical orbits at 2.5 post-Newtonian order

Emission of anisotropic gravitational radiation from compact binary system leads to a flux of linear momentum. This results in the recoil of the system. We investigate the rate of loss of Linear momentum flux in the far zone of the source using various mass type and current type multipole moments for inspiralling compact binary mergers in quasi-elliptical orbits at 2.5 Post Newtonian order. We compute the linear momentum flux accurate up to $\mathcal{O}(e_t)$ in harmonic coordinate. A 2.5 Post Newtonian Quasi-Keplarian representation of the parametric solution to the Post Newtonian equation of motion for the compact binary system has been adopted here. We also provide a closed-form expression for the accumulated linear momentum from the remote past through the binary evolution

On the Intensity-Distribution in the Wing of the Rayleigh Line Due to Liquid Oxygen

The intensity-distribution in the wing accompanying Rayleigh radiation from liquid oxygen has been studied quantitatively by the method of photographic spectrophotometry, using a suitable spectrograph and Hg 4047Å line as exciting radiation. It has been shown that the intensity distribution in the wing .shows a clear maximum at about 40 cm-1 from the centre of the exciting line and the intensity, instead of increasing continuously as the centre of the line is approached, falls off and becomes zero at a distance of 9 cm-1 from the centre of exciting line. The probable causes of the discrepancy between this result and that reported by Crawford et al (1952) have been discussed

A Note on the Assignment of the Vibrational Frequencies of 1, 2-Dibromopropane

From a comparative study of the Raman and infrared spectra of 1,2- dibromopropane in the liquid and solid states obtained from this investigation and those reported by previous workers a complete assignment of the observed frequencies of the molecules of 1,2- dibromopropane has been given in terms of modes of vibration of all the three rotational isomeric forms of the molecul