English

More evidence of cosmic gravitational wave background: Laser interferometer gravitational wave observatory composed of two detectors

1087
2024-05-21 14:14:51
See translation

The gravitational wave background was first detected in 2016. This was announced after the release of the first dataset by the European pulsar timing array. The second set of data has just been released, combined with the timed array of Indian pulsars, and both studies have confirmed the existence of the background. The latest theory seems to suggest that we are seeing a comprehensive signal of the merger of supermassive black holes.

Gravitational waves are spatiotemporal ripples caused by violent processes in the universe. As part of general relativity, Einstein predicted them as early as 1916. People believe that these waves are generated by accelerating masses such as black hole mergers and neutron star collisions. They are expected to travel through space without any obstacles. Their existence was first detected by the Laser Interferometer Gravity Wave Observatory (LIGO) in September 2015. They are believed to originate from the gravitational merger between two black holes located 1.3 billion light-years away.

The Laser Interferometer Gravity Wave Observatory consists of two detectors, one located in Livingston, Louisiana and the other near Hanford, Washington. The detector uses an L-shaped giant arm to measure tiny ripples in the fabric. Universe. 

The background of gravitational waves is a random distribution of gravitational waves that permeate the universe, as detected by the European pulsar timing array. For example, the background is believed to be generated by multiple superimposed gravitational waves generated by supermassive black hole binary stars. Observing the gravitational wave background can provide us with a great opportunity to study the entire universe, just like cosmic background radiation. If it were not for the European pulsar timing array, the Indian PTA, the North American Nahertz Observatory, and the Parks PTA, this achievement would not have been possible.

The Pulsar Timing Array (PTA) consists of a galactic pulsar network, which is monitored and analyzed to detect patterns in the arrival time of its pulses to Earth. Essentially, the function of PTA is equivalent to that of a galaxy sized detector. Although pulsar timing arrays have various applications, the most well-known one is the use of millisecond pulsar arrays to detect and analyze long wavelength gravitational wave backgrounds.

This paper was written by a team led by J. Antoniadis from the Greek Institute of Astrophysics, exploring the meanings of common low-frequency signals observed in the latest data released in the pulsar timing array system. The team collected data from four different datasets and searched for signals containing only high-quality data.

The conclusion is clear and accurate, and there is more evidence to support the existence of gravity wave background. With the passage of time and the increase of pulsar timing array projects, the low-frequency gravity wave background will become increasingly unique. The current task is to explain the details of all these signals in order to maximize the opportunity to explore the universe in this new way.

Source: Laser Net

Related Recommendations
  • Particles have "fuzzy memory" in solid-state batteries

    When you shoot a laser at a solid-state battery, you find that the particles inside are not thrown into the chaos. This surprised a team of researchers from the United States and the United Kingdom.The team discovered the persistence of memory in ions that help move electricity around solid-state batteries.This discovery has improved the understanding of solid-state batteries, which are candidate...

    2024-02-18
    See translation
  • Laser direct writing technology for preparing micrometer scale heatable graphene de icing and anti icing surfaces broadens the preparation method of new de icing and anti icing devices

    Research backgroundIn transportation, industrial production, and practical life, icing often brings great troubles, and the most serious is that during the flight of an aircraft, key components once frozen will seriously affect navigation safety.The traditional passive deicing and anti icing strategies for aircraft, such as mechanical vibration and anti freezing liquids, have problems such as inco...

    2023-10-16
    See translation
  • Leica Cine 1 laser TV with 4K display screen launched with a starting price of $8995

    Photography brand Leica has launched its first 4K movie and television. The Leica Cine 1 laser TV was announced a year later during the I FA 2022 period. This iconic photography brand is shifting some of its focus to projecting perfect images in our living room.featureThe Leica Cine 1 laser TV embodies Leica's philosophy in its camera design. Leica continues to provide precision optical engineerin...

    2023-10-19
    See translation
  • Laser technology helps wafer bonding, creating a cutting-edge laser system production factory

    Recently, Coherent LaserSystems, the global leader in laser and photon solutions, and Fraunhofer IZM-ASSID jointly announced that they have reached a strategic partnership to develop and optimize alternative bonding and debonding technologies for advanced CMOS and heterogeneous integrated applications (including quantum computing), in which laser technology plays a crucial role. It is reported t...

    2024-06-19
    See translation
  • A new method of generating laser without the need for mirrors

    A new laser generation method: a laser without a reflector. This study, conducted by a team of physicists from the University of Innsbruck and Harvard University, shows that quantum emitters with spacing smaller than the wavelength can achieve constructive synchronization of photon emission, resulting in bright and extremely narrow bandwidth beams, even without any optical resonant cavities.The ac...

    10-30
    See translation