Nonlinear Resonance in the Accretion Disk of a Millisecond Pulsar
- 17 February 2004
- journal article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 603 (2) , L89-L92
- https://doi.org/10.1086/383143
Abstract
Twin quasi-periodic millisecond modulations of the X-ray flux (kHz QPOs) have recently been reported from an accreting 2.5 ms X-ray pulsar. We identify modes of disk oscillations whose frequencies are in agreement with the observed ones when the rotating neutron star is modeled with realistic equations of state. The frequency difference of the twin QPOs, equal to about one half of the neutron-star spin rate, clearly indicates that resonant oscillations of the accretion disk have been observed. Similar non-linear resonances may also be spontaneously excited in the accretion disk. The two QPO frequencies in the pulsar system are close to a 5:7 ratio and this suggests a link with the QPOs in black hole systems, where frequency ratios of 2:3 and 3:5 have been reported.Comment: 9 p., 3 figKeywords
All Related Versions
This publication has 26 references indexed in Scilit:
- Excitation of g-Mode Oscillations on Relativistic Disks by Parametric Resonances with a WarpPublications of the Astronomical Society of Japan, 2003
- Evidence for a 2:3 resonance in Sco X-1 kHz QPOsAstronomy & Astrophysics, 2003
- Non-Linear Resonance in Nearly Geodesic Motion in Low-Mass X-Ray BinariesPublications of the Astronomical Society of Japan, 2003
- No observational proof of the black-hole event-horizonAstronomy & Astrophysics, 2002
- The swallowing of a quark star by a black holeMonthly Notices of the Royal Astronomical Society, 2002
- A Unified Description of the Timing Features of Accreting X‐Ray BinariesThe Astrophysical Journal, 2002
- A precise determination of black hole spin in GRO J1655-40Astronomy & Astrophysics, 2001
- Basic Properties of Thin-Disk OscillationsPublications of the Astronomical Society of Japan, 2001
- Black-Hole Accretion DisksProgress of Theoretical Physics Supplement, 1999
- Determining the properties of accretion-gap neutron starsThe Astrophysical Journal, 1990