Frequency Correlations of QPOs Based on a Disk Oscillation Model in Warped Disks

[摘要] Inpreviouspapers,weproposedamodelthathigh-frequencyquasi-periodicoscillations(QPOs)observedinblack-holeandneutron-starX-raybinariesarediskoscillations(inertial-acousticand/org-modeoscillations)resonantlyexcitedonwarpeddisks.InthispaperweexaminewhethertimevariationsoftheQPOsandtheirfrequencycorrelationsobservedinneutron-starX-raybinariescanbeaccountedforbythisdisk-oscillationmodel.Byassumingthatawarphasatime-dependentprecession,wecanwelldescribetheobservedfrequencycorrelationsamongkHzQPOsandlow-frequencyQPOsoverawiderangeoffrequencies.

[学科分类] 天文学(综合)

[关键词] "accretion;accrection disks";"quasi-periodic oscillations";resonance;"stars: neutron";"X-rays: stars"