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Cosmologists Witnessed Huge Tug-Of-War Between Pulsar & Companion Star

January 11, 2015 By Denise Ehrlich

Binary-pulsars

Cosmologists are seeing a huge tug-of-war between a spinning neutron star — known as a “pulsar” — and companion star that is so strong, it is causing waves that twist space and make the pulsar wobble, creating it to vanish from view on the whole.

Known as the revolving ” lighthouses” of deep space, this specific pulsar has blurred from view in the wake of being locked in a tight orbit with a companion star. Cosmologists have been monitoring the movement of the pulsar nearly for 5-years, permitting them to determine its weight and how much of an impact it has on gravity, as per a BBC report.

Ingrid Stairs, a professor of astrophysics and astronomy at the University of British Columbia has been investigating the system called J1906 with an international group of researchers. The system is 25,000 light years from Earth and comprises of a pulsar — a very charged, quickly pivoting neutron star — that circles around a companion star in just under 4-hours.

Neutron stars are the thick, collapsed leftovers of gigantic stars that have experienced supernova blasts.

The pulsar releases a lighthouse-like beam of radio waves that the group has been observing. But since the pulsar’s spin axis “wobbles” like a revolving top, the area that releases the waves moves and in the end they generally won’t reach Earth.

The waves have been becoming fainter for years and have now almost vanished, said Stairs.

“We would anticipate that it will return again inevitably … yet (that) takes around 160 years,” she said. “We are lucky discovering the framework when we did.”

The group was able to determine the masses of the two stars by measuring changes in the orbit on account of Albert Einstein’s hypothesis of general relativity.

The stars each weigh more than the Sun, yet are above 100 times closer together than Earth is to the Sun. Their rapid orbit brings about amazing gravity, Stairs said.

“Envision those circling one another every 4-hours, if you can. That is an extremely dense orbit with exceptionally enormous objects,” she said.

Stairs said cosmologists know of around 2,400 pulsars — and only 10 of those are binary neutron star systems.

She said its “feasible” the companion in J1906 is a neutron star however it might likewise be a white dwarf. A white dwarf is a leftover of low-mass star.

Just a modest bunch of binary neutron star systems have had their masses measured and J1906 is the most youngest yet, as indicated by a UBC news report.

“An intriguing aspect concerning the system is that it is an, exceptionally young pulsar that we see. In the systems that we think are binary neutron systems, typically we see a pulsar that is very old,” Stairs said.

Stairs and her group published the results of their study in the Astrophysical Journal and presented them at the American Astronomical Society meeting in Seattle on Jan. 8.

The lead author on the study was Joeri van Leeuwen, an astrophysicist at the Netherlands Institute for Radio Astronomy and the University of Amsterdam.

 

  • About the Author

About Denise Ehrlich

Denise would describe herself as one more of an experience witness than a journalist. Soon after graduating, Denise worked as a journalist during the presidential campaign of Senior US Senator John McCain. Since then, much has changed, and Denise found herself gravitating towards world news.

Filed Under: Science Tagged With: BBC report, Companion star, Ingrid Stairs, J1906, Joeri van Leeuwen, lighthouses, Pulsar, spinning neutron star

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