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Saturday, January 20, 2018

Russian telescope has detected abnormal temperature in the quasar 3C273

Observatory “Radioastron” showed that the quasar 3C273 has an effective temperature of from 10 to 40 trillion degrees Celsius. This is about ten times higher values that allow the theory. Research of Russian scientists published in the journal Astrophysical Journal Letters, briefly reported in the press release of FIAN, arrived in edition “Tapes.ru”.

“It’s contrary to our ideas about the nature of the radiation of quasars. We have not been able to find a satisfactory explanation of the observed 10-fold “over temperature”. I guess striking result lies a new Chapter in the study of the distant Universe,” says the head of the project “Radioastron” and Astro space center of Lebedev physical Institute, Nikolai Kardashev.

The effective temperature of the plasma, from which the jets of quasars, may not exceed 500 billion degrees. The ceiling temperature is associated with the inverse Compton catastrophe: if the electron energy exceeds this limit, an avalanche, they begin to transfer energy to the photons and cool down. Quasar 3C273 violates this constraint, while accounting for relativistic effects is not sufficient to explain this phenomenon.

In 1963, in the constellation of the virgin was discovered quasar 3C273, measured its redshift. Then it became clear that these “quasi-star” — core of a distant active galaxies, at a distance of billions of light years. These are compact objects, whose brightness can exceed the brightness of an entire galaxy. Supermassive black holes at the centers of quasars attract matter, it is heated to ultra high temperatures and emits part of it.

The Radioastron project was developed in cooperation with Russian and international organizations in Astro space center of Physical Institute named Lebedev, Russian Academy of Sciences Peter and NGOs behalf of the Lavochkin Seeds. The idea of the project is to create a ground-space radio interferometer with very long base of several hundred thousand kilometers, which is impossible to achieve using ground-based telescopes.

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