Discovery of Kilohertz Quasi-periodic Oscillations in the Z source GX 340+0
نویسندگان
چکیده
منابع مشابه
Discovery of KiloHertz Quasi-Periodic Oscillations in GX 17+2
We observed the low-mass X-ray binary and Z source GX 17+2 with the Rossi Xray Timing Explorer during 6–8 Feb 1997, 1–4 Apr 1997, and 26–27 Jul 1997. The X-ray color-color diagram shows a clear Z track. Two simultaneous kHz quasi-periodic oscillations (QPOs) are present in each observation, whose frequencies are well correlated with the position of the source on the Z-track. At the left end of ...
متن کاملA pr 1 99 8 Discovery of kilohertz quasi - periodic oscillations in the Z source GX 340 + 0
We have discovered two simultaneous kHz quasi-periodic oscillations (QPOs) in the Z source GX340+0 with the Rossi X-ray Timing Explorer. The X-ray hardness-intensity and color-color diagram each show a full Z-track, with an extra limb branching off the flaring branch of the Z. Both peaks moved to higher frequencies when the mass accretion rate increased. The two peaks moved from 247± 6 and 567±...
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We discovered a single kHz quasi-periodic oscillation (QPO) near 1150 Hz in the Rossi X-ray Timing Explorer X-ray light curve of the low mass X-ray binary and atoll source 4U 1735−44. The rms amplitude of this peak was 2–3 %, and the FWHM 6–40 Hz. There are indications that the kHz QPO frequency decreased from 1160 Hz to 1145 Hz when the count rate increased, which would be quite different from...
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The remarkable discovery of kilohertz quasi-periodic brightness oscillations (QPOs) in the accretion-powered emission from some sixteen neutron-star low-mass Xray binary systems has led to much speculation about and theoretical modeling of the origin of these oscillations. It has also led to intense study of the implications that these QPOs have for the properties of neutron stars and of the ac...
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During observations with the Rossi X-Ray Timing Explorer from 1997 June 31 to July 3 we discovered two simultaneous kHz quasi-periodic oscillations (QPOs) near 500 and 860 Hz in the low-mass X-ray binary and Z source Cygnus X-2. In the X-ray color-color diagram and hardness-intensity diagram (HID), a clear Z track was traced out, which shifted in the HID within 1 day to higher count rates at th...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 1998
ISSN: 0004-637X
DOI: 10.1086/311372