Aims. We quantify the effect of gravitational redshift on emission lines to explore the transition region from the Newtonian to the Einsteinian regime. With the emitting region closer to the Kerr black hole, lines are successively subjected to a stronger gravitationally induced shift and distortion. Simulated lines are compared to broad, optical emission lines observed in Mrk 110. Methods. We s...

The Doppler tracking data from two deep-space spacecraft, Pioneer 10 and 11, show an anomalous blueshift, which has been dubbed the “Pioneer anomaly”. The effect is most commonly interpreted as a real deceleration of the spacecraft — an interpretation that faces serious challenges from planetary ephemerides. The Pioneer anomaly could as well indicate an unknown effect on the radio signal itself...

The objective of this paper is to study the problem of gravitational capture in the bicircular restricted four-body problem. A gravitational capture occurs when a massless particle changes its two-body energy around one celestial body from positive to negative without the use of non-gravitational forces. It is mainly studied the effect of the fourth-body included in the dynamics. The Earth-Moon...

Small total chirality in the gravitational terms originates from the cancellation of the large rightand left-handed helicity elements. Therefore, the external potential energy for gravity can be very small but finite values, and the distortion of the spacetime axes can occur. That is, gravitational field can originate from the fluctuation of the electromagnetic fields because of the slight pola...

Aims. To investigate the effect of gravitational lensing of supernovae in large ongoing surveys. Methods. We simulate the effect of gravitational lensing magnification on individual supernovae using observational data input from two large supernova surveys. To estimate the magnification due to matter in the foreground, we simulate galaxy catalogs and compute the magnification along individual l...