Gravitational Waves
نویسنده
چکیده
This article reviews current efforts and plans for gravitational-wave detection, the gravitationalwave sources that might be detected, and the information that the detectors might extract from the observed waves. Special attention is paid to (i) the LIGO/VIRGO network of earth-based, kilometer-scale laser interferometers, which is now under construction and will operate in the highfrequency band (1 to 10 Hz), and (ii) a proposed 5-million-kilometer-long Laser Interferometer Space Antenna (LISA), which would fly in heliocentric orbit and operate in the low-frequency band (10 to 1 Hz). LISA would extend the LIGO/VIRGO studies of stellar-mass (M ∼ 2 to 300M⊙) black holes into the domain of the massive black holes (M ∼ 1000 to 10M⊙) that inhabit galactic nuclei and quasars.
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امواج گرانشی حرارتی در فاز شتابدار کیهان
Gravitational waves are considered in thermal vacuum state. The amplitude and spectral energy density of gravitational waves are found enhanced in thermal vacuum state compared to its zero temperature counterpart. Therefore, the allowed amount of enhancement depends on the upper bound of WMAP-5 and WMAP-7 for the amplitude and spectral energy density of gravitational waves. The enhancement of ...
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