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Record 1 of 75111
The Stochastic X-Ray Variability of the Accreting Millisecond Pulsar MAXI J0911-655
External Online Source: doi:10.3847/1538-4357/aa607f
Author and Affiliation:
Bult, Peter(Universities Space Research Association, Greenbelt, MD, United States)
Abstract: In this work, I report on the stochastic X-ray variability of the 340 hertz accreting millisecond pulsar MAXI J0911-655. Analyzing pointed observations of the XMM-Newton and NuSTAR observatories, I find that the source shows broad band-limited stochastic variability in the 0.01-10 hertz range with a total fractional variability of approximately 24 percent root mean square timing residuals in the 0.4 to 3 kiloelectronvolt energy band that increases to approximately 40 percent root mean square timing residuals in the 3 to 10 kiloelectronvolt band. Additionally, a pair of harmonically related quasi-periodic oscillations (QPOs) are discovered. The fundamental frequency of this harmonic pair is observed between frequencies of 62 and 146 megahertz. Like the band-limited noise, the amplitudes of the QPOs show a steep increase as a function of energy; this suggests that they share a similar origin, likely the inner accretion flow. Based on their energy dependence and frequency relation with respect to the noise terms, the QPOs are identified as low-frequency oscillations and discussed in terms of the Lense-Thirring precession model.
Publication Date: Mar 03, 2017
Document ID:
20170002247
(Acquired Mar 15, 2017)
Subject Category: ASTROPHYSICS; ASTRONOMY
Report/Patent Number: GSFC-E-DAA-TN39881
Document Type: Journal Article
Publication Information: Astrophysical Journal; p. 1-8; (e-ISSN 2041-8213); Volume 837; No. 1, Article 61
Publisher Information: American Astronomical Society
Contract/Grant/Task Num: NNH15CO48B
Financial Sponsor: NASA; Washington, DC, United States
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD United States
Description: 8p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: STOCHASTIC PROCESSES; X RAYS; VARIABILITY; DEPOSITION; PULSARS; NEUTRON STARS; X RAY BINARIES; ENERGY BANDS; SPECTRAL BANDS; FREQUENCIES; OSCILLATIONS; PERIODIC VARIATIONS; NOISE SPECTRA; PRECESSION; LOW FREQUENCIES; TIME SERIES ANALYSIS; DATA REDUCTION; XMM-NEWTON TELESCOPE; SPACEBORNE TELESCOPES
Other Descriptors: ULSARS: GENERAL { STARS: NEUTRON { X-RAYS: BINARIES { INDIVIDUAL (MAXI J0911{655
Availability Source: Other Sources
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Last Modified: March 15, 2017
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