Low and high frequency Quasi-Periodic Oscillations in 4U1915-05

Details Low and high frequency Quasi-Periodic Oscillations in 4U1915-05 Low and high frequency Quasi-Periodic Oscillations in 4U1915-05

1999-02-17

arxiv.org/abs/astro-ph/9902237v1

AIP Conf.Proc.599:518-521,1999

Astronomy and Astrophysics

Astrophysics

Accepted for publication in Advances in Space Research, Proc. of the 32nd COSPAR Meeting help in Nagoya, 12-15 July 1998, "Bro

Scientific paper

10.1063/1.1434675

The burster and dipper Low Mass X-ray Binary (LMXB) 4U1915-05 (also known as XB1916-053) was observed by the Rossi X-ray Timing Explorer (RXTE) 19 times for a total exposure of 140 ks between 1996 February and October. Here we report on the discovery of Low Frequency (10-40 Hz) Quasi-Periodic Oscillations (LFQPOs) from 4U1915-05. The properties of the LFQPOs are related to the presence of the High Frequency QPOs (HFQPOs) detected simultaneously. We have observed a correlation between the LFQPO frequency and source count rate, as well as a correlation (linear) between the LFQPOs and HFQPOs. Both results cannot be explained by a Beat Frequency Model (BFM). They are also hardly compatible with predictions from the inner disk precession model.

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