black widow pulsar

Plasma lens discovered by researchers in black widow pulsar

Pulsars are very compact neutron stars, in rapid rotation, which emit strong electromagnetic radiation. A team of scientists led by Dr. Wang Shuangqiang of theXinjiang Observatory of the Chinese Academy of Sciences recently studied these celestial objects. They found that these emit strong radiation (gamma rays, x-rays, observed light and radio waves) from their magnetic pole.

The group also discovered that the Black Widow star system has a low mass companion star which revolves around the pulsar millisecond in a compact orbit. However, their biggest revelation is the plasma lens present in the pulsar PSR J1720-0533 of the black widow.

So far, scientists are continuing their exploration in order to find the origin of this object discovered, as well as information about it. L’Chinese Academy of Sciences provided the team of researchers with the necessary resources to bring them to an end.

Pulsed emission presents plasma lenses

Pulsars provide valuable opportunities for study the characteristics of companion stars under intense irradiation. In their study, the astrophysicists found that the pulsar emission PSR J1720-0533 during the entry of the eclipse presents quasi-periodic modulations. They deduced that these phenomena can be caused by plasma lens.

By analyzing the lens phenomenon, the team concluded that the maximum magnification of this glass block is 1.6. Which corresponds to a size of several tens of kilometers. This discovery shows the importance of dispersion measurements and lens effects.

A magnetic field dominates the companion

Also as part of their study, the group examined the polarization profiles near the eclipse of PSR J1720-0533. They found that the linear voltage of the emission disappeared before the dispersion measurement showed significant changes. This phenomenon provides strong evidence for the existence of a strong magnetic field in the companion.

These results thus suggest that magnetic fields play an important role in the eclipse mechanism of pulsars black widows. In addition, the researchers estimated the companion’s rate of mass loss at 10-12 M⊙ / year. They also assumed that the latter will be completely destroyed in 1010 year.


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