Laser interference gravity wave Observatory LIGO detection of black holes or a "mother" born

Researchers at the Harvard-Smithsonian Institute of Astrophysics (CFA) said that the LIGO double-black hole that directly detected the gravitational waves on September 14 last year may have been born at the end of its lifetime Massive star of a horse ray. Relevant research results published in the latest issue of "Astrophysics" magazine.

According to the Physiological Organization's Web site reported on the 23rd, CFA astrophysicist Ivy Lloyd said: "This event in the universe is equivalent to a pregnant woman with a pair of twins." The two super-star-level black hole The mass fraction R% is 29 times and 36 times the mass of the sun. After the LIGO detected a signal of double black hole coalescence, the Fermi Gamma Space Telescope discovered an emerging gamma ray in just 0.4 seconds from the same area of ​​the sky.

Usually, when a giant star reaches the end of its life, its core can collapse into a black hole. However, if the star rotates unusually rapidly, its core may extend into a dumbbell shape and divide into two clumps, each forming a black hole.

After this pair of black holes is formed, the outer layers of stars are momentarily directed inward toward them. The double black hole was initially separated into Earth-sized cells and merged close enough within minutes to generate both gravitational waves and gamma rays. After that, the newly formed single black hole competes with the material around the "blitz" and spurts the outbreak material.

However, INTEGRAL did not confirm this signal. Lao Eber said: "Even if the detection of Fermi is a false alarm, the future LIGO should also monitor the incident light burst out Whether it comes from the merger of black holes will naturally give us some surprises.

Lauber pointed out: "If we detect more gamma-ray bursts from gravitational wave events, this will provide a promising new way to measure the distance of the universe and its expansion. By observing the afterglow of gamma ray bursts and Astronomers can precisely define cosmological parameters by measuring their redshift and comparing them with the distance measured independently from LIGO The astrophysical black hole is easier to study than other distance metrics such as supernovae, And spin can be completely determined. "

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