German astronomers have discovered unique properties in space object J1832.4 
German astronomers at the University of Göttingen have observed the recently discovered polar J1832.4-1627 , which turned out to be unique among space objects of this kind. The research results are reported in an article published in the arXiv.org repository. A summary of the scientific work is described in a press release on Phys.org.
Polars are called a special type of magnetized cataclysmic variables – binary systems in which a white dwarf pulls (accrets) matter from a companion star, most often a red giant, as a result of which a disk is formed. From time to time, the brightness of the variable increases several times, followed by a period of rest. For intermediate polars, in which the white dwarf has a moderate magnetic field, the accretion disk is either truncated or absent altogether. In the latter case, the accretion stream alternately feeds both poles of the white dwarf (this is called pole flipping or pole flipping), but such polars have not yet been discovered.
J1832.4, which was discovered in July 2019 by the Calar Alto Observatory in Spain, is located 4100-9300 light-years from Earth and is an intermediate polar. For three seasons of observation, scientists have found no signs of an accretion disk. Astronomers have detected light emanating from two accretion points on the white dwarf, indicating that the flow of matter from the red giant alternately falls on both poles. At the same time, the absence of an accretion disk and the observed switching of the flux in J1832.4 were not short-term phenomena, that is, this is a characteristic property of the polar.
Thus, J1832.4 belongs to deeply eclipsing intermediate polars with an accretionary flux. In addition, this object exhibits a variable rate of absorption of companion matter and repeatedly passes into short-term states with insignificant accretion. Moreover, the orbital period of the binary appears to be decreasing. The scientists conclude that further research is needed to better understand the behavior of the polar, especially X-ray observations, optical spectroscopy and spectropolarimetry.