Dependence of the Frequency of the Kilohertz Quasi-periodic Oscillationson X-Ray Count Rate and Colors in 4U 1608–52
Mariano Mendez,Mariano Mendez,M. van der Klis,Eric C. Ford,Rudy Wijnands,J. van Paradijs,J. van Paradijs +6 more
TLDR
In this article, the Rossi X-ray Timing Explorer was used to detect the frequency of the kilohertz quasi-periodic oscillations (kHz QPOs) of the LMXB and atoll source 4U 1608-52.Abstract:
We present new results based on observations carried out with the Rossi X-ray Timing Explorer during the decay of an outburst of the low-mass X-ray binary (LMXB) and atoll source 4U 1608-52. Our results appear to resolve, at least in 4U 1608-52, one of the long-standing issues about the phenomenology of the kilohertz quasi-periodic oscillations (kHz QPOs), namely the lack of a unique relation between the frequency of the kHz QPOs and the X-ray flux. We show that despite its complex dependence on the X-ray flux, the frequency of the kHz QPOs is monotonically related to the position of the source in the color-color diagram. Our findings strengthen the idea that, as in the case of Z sources, in the atoll sources the X-ray flux is not a good indicator of and that the observed changes in the frequency of the kHz QPOs in LMXBs are driven by changes in . These results raise some concern about the recently reported detection of the orbital frequency at the innermost stable orbit in 4U 1820-30.read more
Citations
More filters
Journal ArticleDOI
Millisecond Oscillations in X-Ray Binaries
TL;DR: The end of at least one cable is connected to a float and the other end exerts a tractive effort on one or a number of collecting vehicles which land on the bottom at predetermined points with respect to the point of landing of the ballast.
Journal ArticleDOI
Correlated X-Ray Spectral and Timing Behavior of the Black Hole Candidate XTE J1550–564: A New Interpretation of Black Hole States
Jeroen Homan,Rudy Wijnands,Rudy Wijnands,Michiel van der Klis,Tomaso Belloni,Tomaso Belloni,Jan van Paradijs,Jan van Paradijs,M. Klein-Wolt,Rob Fender,Mariano Mendez,Mariano Mendez +11 more
TL;DR: In this paper, an analysis of data of the black hole candidate and X-ray transient XTE J1550-564, taken with the Rossi X-Ray Timing Explorer between 1998 November 22 and 1999 May 20, is presented.
Journal ArticleDOI
Correlations in the QPO Frequencies of Low Mass X-Ray Binaries and the Relativistic Precession Model
TL;DR: In this article, the relativistic precession model has been used to interpret the frequencies of quasi periodic oscillations (QPOs) from low mass X-ray binaries of the Atoll and Z classes.
Journal ArticleDOI
Correlations in the Quasi-periodic Oscillation Frequencies of Low-Mass X-Ray Binaries and the Relativistic Precession Model
TL;DR: In this article, the relativistic precession model was proposed to interpret the kilohertz quasi-periodic oscillations (QPOs) as well as some of the lower frequency QPOs of low-mass X-ray binaries.
Journal ArticleDOI
Probes and Tests of Strong-Field Gravity with Observations in the Electromagnetic Spectrum
TL;DR: The prospect of using observations of such compact objects to probe some of the most intriguing general relativistic predictions in the strong-field regime: the absence of stable circular orbits near a compact object and the presence of event horizons around black-hole singularities is reviewed.
References
More filters
BookDOI
The many faces of neutron stars
TL;DR: In this paper, the authors present a history of Neutron stars from early speculations to current problems, including the discovery of the first radio pulsar, the first detection of radio emissions from Pulsars, and the first measurement of the Vela Pulsar at MeV Energies at the PSR B0655+64.
Journal ArticleDOI
Sonic-Point Model of Kilohertz Quasi-periodic Brightness Oscillations in Low-Mass X-Ray Binaries
TL;DR: In this paper, the authors proposed a model for the X-ray emission from 14 neutron stars in low-mass binary systems and from another neutron star in the direction of the Galactic center.
BookDOI
Astronomical Time Series
TL;DR: In this article, a collection of book collections are available to download and one of them is this astronomical time series as your preferred book, which can be found on the link page to download.
Journal ArticleDOI
Discovery of submillisecond quasi-periodic oscillations in the x-ray flux of scorpius X-1
M. van der Klis,Jean H. Swank,W. W. Zhang,Keith Jahoda,Edward H. Morgan,Walter H. G. Lewin,Brian A. Vaughan,J. van Paradijs +7 more
TL;DR: In this article, the Rossi X-Ray Timing Explorer (RXTE) reported the discovery of the first submillisecond oscillations in a celestial X-ray source.
Journal ArticleDOI
Discovery of Sub-Millisecond Quasi-Periodic Oscillations in the X-Ray Flux of Scorpius X-1
M. van der Klis,J. H. Swank,W. W. Zhang,Keith Jahoda,Edward H. Morgan,Walter H. G. Lewin,Brian A. Vaughan,J. van Paradijs +7 more
TL;DR: In this paper, the Rossi X-ray Timing Explorer (RXTE) was used to detect quasi-periodic oscillations (QPO) in a celestial Xray source.