Tomasz Nowakowski is a member of the physics.org community.
A unique intermediate polar known as Paloma has been analyzed using data from the XMM-Newton satellite and the NuSTAR space observatory. The results of the study were published on arXiv.org.
A cataclysmic variable is a star system with a white dwarf. They drop back down to a quiescent state after increasing in brightness. There is a very strong magnetic field in the white dwarfs that distinguishes polars from other CVs.
When the white dwarf is moderately magnetic, accretion happens through a truncated accretion disk. Intermediate polars are systems that are not directly related to each other. The observations show that the magnetic white dwarf (WD) spins quickly with the system's spin period. It is possible to reveal the intellectual property nature of some CVs with the help of the spin period and ephemeris.
Paloma is an intermediate polar in which theWD asynchronism is much less than other intellectual property. In order to find out more about this peculiarity and the general properties of Palomar, Anirban Dutta and Vikram Rana investigated this source.
The researchers used the broadband X-ray data from XMM-Newton and NuSTAR to give an overall description of the system.
There is a single broad hump-like structure with strong dips in the light curves. The emission seen from at least one pole during the motion of the white dwarf in Paloma is assumed to be the reason for this. There is a complex inhomogeneous absorber that causes these dips.
The absorber shows a significant variation with the phase. During the orbital phase, it was estimated that it contributed between 0.1 and 0.22. The researchers think that this absorber comes from the accretion curtain or stream.
The researchers were able to measure the mass of Paloma's white dwarf. It has a mass of 0.74 solar mass and a radius of 7,400 kilometers, according to their findings. The ionized emission lines in the soft X-rays of Paloma and a neutral iron K- alpha line are weaker than the ionized lines.
More information: Anirban Dutta, Vikram Rana, Study of Complex Absorption and Reflection in a Unique Intermediate Polar Paloma. arXiv:2206.08635v1 [astro-ph.HE], arxiv.org/abs/2206.08635There is a science network.
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