Abstract
We study systematically the ^0.1¨1200 Hz quasi-periodic oscillations (QPOs) and broad noise com- ponents observed in the power spectra of nonpulsing neutron star and black hole low-mass X-ray binaries. We show that among these components we can identify two, occurring over a wide range of source types and luminosities, whose frequencies follow a tight correlation. The variability components involved in this correlation include neutron star kilohertz QPOs and horizontal-branch oscillations, as well as black hole QPOs and noise components. Our results suggest that the same types of variability may occur in both neutron star and black hole systems over 3 orders of magnitude in frequency and with coherences that vary widely but systematically. Con—rmation of this hypothesis will strongly con- strain theoretical models of these phenomena and provide additional clues to understanding their nature. Subject headings: accretion, accretion disksblack hole physicsstars: neutron ¨ stars: oscillationsX-rays: stars
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
