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GX 339-4
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GX 339-4 : ウィキペディア英語版
GX 339-4


GX 339-4 is a moderately strong variable galactic low-mass X-ray binary (LMXB) source〔(SIMBAD )〕〔Bradt, H.V.D., and McClintock, J.E., Annual Rev. Astron. Astrophys., 21, 13-66 (1983)〕 and black-hole candidate that flares from time to time. From spectroscopic measurements, the mass of the black-hole was found to be of 5.8 solar masses.
During the outbursts GX 339-4 shows evolution of quasi-periodic oscillations (QPOs). In the rising phase the QPO frequency monotonically increase as the CENBOL propagates closer to the black hole and in the declining phase the QPO frequency monotonically decreases since the CENBOL recedes away from the black hole after viscosity is decreased. The frequency variation is thus well (modeled by the propagating and oscillating shock ) in the sub-Keplerian flow. The entire spectrum also fits very well using (two component advective flow solution ).
A strong, variable relativistic jet, emitting from radio to infrared wavelengths was observed by several studies.
==References==


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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