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July 12, 2018, 12:45 Washington, July 12 (Prensa Latina) US scientists have proposed the use of gravitational waves to measure the Hubble constant and obtain a definitive resolution of the rapid growth of the universe. Physical Review Letters Journal
The studies conducted so far on this constant had given values and unclear researchers. considers that the new proposal will provide more information about the origins of the universe, its destination and whether the cosmos will grow indefinitely or collapse.
The method is based on the use of gravitational waves emitted by a relatively rare system: black-neutron hole, which constitutes an energetic pairing of a spiral black hole and a "black hole". a neutron star.
With the experts, as these objects are surrounded, they must produce gravitational waves agitated by space and a flash of light when they collide.
This flash of light provides an estimate of the speed of the system, or how fast it is to move away from the Earth. The gravitational waves emitted, if detected on Earth, should provide an independent and accurate measure of system distance.
Although binary neutron stars and black holes are rare, it is estimated that According to Salvatore Vitale, lead author of the study, a few should give the most accurate value possible for the constant of Hubble and the speed of the expanding universe.
Next year, Vitale and his team will use a laser interferometer from the gravitational wave observatory. take new data that allow them to observe more distant objects and help solve the existing tension in the measurement of the Hubble constant.
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