Friday , February 26 2021

Cosmic eruptions in a new binary gamma ray system

The scientific institute explains that a high-energy high-emission, high-energy, high-energy emission has been detected from the binary PSR system J2032 + 4127 / MT91 213, an "eccentric" pair of stars gravitationally linked to a 50-year orbit.
Binary emitting gamma ray systems are atypical objects and in them a neutron star or a black hole, residues of the final stage of star development, orbit around a massive star.

Few binary systems have been detected in the domain of very high energy gamma rays as fewer than 10 sources of this type have been found so far, although the nature of the compact object or stellar journey is unknown. Say if it's a neutron star or a black hole.

IAC declares that in 2002, HEGRA telescope in La Palma discovered a gamma ray emission from a large source of unidentified nature: TeV J2032 + 4130.
Six years later, the Fermi-LAT satellite discovered a highly magnetized or pulsed neutron star, named PSR J2032 + 4127, which appeared to be responsible for the release of this unknown source.

The "Surprise" came in 2015 when it learned that this pulse is actually linked to the star MT91 213 and it takes 50 years to complete an orbit around it, he adds.
"This opportunity could not be wasted"

The most interesting thing about this discovery was, however, that the closest approach between the pulse and the star would take place in November 2017 and Alicia López Oramas, a researcher at the IAC and one of the leading authors of the study indicates that "under this approach, it was expected that such unique system would emit much old energy radiation and this could not be missed ".

Immediately, a joint observation campaign was launched to detect cosmic outbreaks from this binary system and in 2016, both observers began to search for emissions from this source, but all they could detect was the extensive release of the TeV J2032 + 4130.

This source is probably a nebula, the shell of a supernova switch, fed by the pulse, explains Ralph Bird, a researcher at the University of California Los Angeles, so in 2016 all that could be seen after 50 hours of observations was the weak emission of this source.

In September 2017, astronomers discovered before the planned approach for the first time an increase in the emission of the new binary gamma ray system.

"Gamma radiation flow doubled the value measured from the expanded source," said Tyler Williamson, a doctoral student at the University of Delaware (UD).
But the most amazing event took place in November, because when closest to the star and pulsar, the flow increased 10 times in a single night, recalls Jamie Holder, professor at the Department of Physics and Astronomy at the UD.

Prior to this detection only another binary gamma ray system with an identified pulse was known, but in either case, the particles accelerated in the shock created between the star wind and the pulse producing gamma radiation emission.

"Knowledge of the character of the compact object allows us to study the acceleration of the particle and gamma radiation models," says Oscar Blanchas Bigas, researcher at the Institute for Physics in Alte Energies (IFAE).

The Cherakov Telescope Network (CTA), a new generation of observatory, just opened the prototype of what could be the first large-scale telescope (LST-1) in ORM, will help detect new binary gamma systems.

"With an estimated population of between 100 and 200 binary gamma systems in our galaxy, CTA is likely to reveal the nature of these systems and provide new insights into their development," concludes Javier Herrera Llorente, a researcher who participated in the study and the head of the CTA project in IAC.


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