New preprint on arXiv: how can we measure the spacetime curvature and determine the mass distribution along the line of sight by measuring the variations of times of arrival of electromagnetic signals?

Weighing the spacetime along the line of sight using times of arrival of electromagnetic signals Mikołaj Korzyński, Jan Miśkiewicz We present a new method of measuring the mass density along the line of sight, based on precise measurements of the variations of the times of arrival (TOA’s) of electromagnetic signals propagating between two distant regions … More New preprint on arXiv: how can we measure the spacetime curvature and determine the mass distribution along the line of sight by measuring the variations of times of arrival of electromagnetic signals?

New paper published in Phys. Rev. D

“Geometric optics in relativistic cosmology: new formulation and a new observable”, Mikołaj Korzyński, Eleonora Villa, Phys. Rev. D101 (2020) no.6, 063506 DOI: 10.1103/PhysRevD.101.063506 e-Print: arXiv:1912.04988 [gr-qc]   Abstract: We discuss a new formalism for light propagation which can be used within the regime of validity of geometric optics, but with no limitation on the scales of … More New paper published in Phys. Rev. D

Paper published in Phys. Rev. D as Editor’s suggestion

“Geometric optics in general relativity using bilocal operators”, Michele Grasso, Mikołaj Korzyński, Julius Serbenta, Phys. Rev. D99 (2019) no.6, 064038    Editors’ suggestion DOI: 10.1103/PhysRevD.99.064038 e-Print: arXiv:1811.10284 [gr-qc] Abstract: We consider the standard problem of observational astronomy, i.e., the observations of light emission from a distant region of spacetime in general relativity. The goal is to … More Paper published in Phys. Rev. D as Editor’s suggestion

New paper published in Journal of Cosmology and Astroparticle Physics

“Optical drift effects in general relativity” Mikołaj Korzyński, Jarosław Kopiński JCAP 1803 (2018) 012 DOI: 10.1088/1475-7516/2018/03/012 e-Print: arXiv:1711.00584 [gr-qc] Abstract: We consider the question of determining the optical drift effects in general relativity, i.e. the rate of change of the apparent position, redshift, Jacobi matrix, angular distance and luminosity distance of a distant object as … More New paper published in Journal of Cosmology and Astroparticle Physics

Post-doc position in our group

We are looking for a post-doctoral research fellow: The Director of the Center for Theoretical Physics invites applications for a postdoctoral position at the CTP PAS, financed from the project “Local relativistic perturbation theory in hydrodynamics and cosmology” No. 2016/22/E/ST9/00578 (SONATA BIS 6) supported by the National Science Center, decision No. DEC-2016/22/E/ST9/00578. The principal investigator … More Post-doc position in our group