Accreting millisecond pulsars: one on each hand

Bibcode
2007AIPC..924..629L
DOI
10.1063/1.2774920
Linares, Manuel; van der Klis, Michiel; Wijnands, Rudy
Bibliographical reference

THE MULTICOLORED LANDSCAPE OF COMPACT OBJECTS AND THEIR EXPLOSIVE ORIGINS. AIP Conference Proceedings, Volume 924, pp. 629-634 (2007).

Advertised on:
8
2007
Number of authors
3
IAC number of authors
0
Citations
26
Refereed citations
24
Description
We report on the X-ray aperiodic timing analysis of two accreting millisecond pulsars: XTE J1807-294 and IGR J00291+5934. On the one hand, we discovered in XTE J1807-294 seven pairs of simultaneous kilohertz quasi-periodic oscillations (kHz QPOs) separated in frequency by nearly the spin frequency of the neutron star. This confirms the suspected dichotomy in the frequency separation of kHz QPOs: sometimes once and sometimes half the spin frequency. On the other hand, we found an extreme behavior in the power spectra of IGR J00291+5934: very strong variability at very low frequencies. Namely, the fractional amplitude of the variability was ~50%, the highest value found so far in a neutron star system.
Type
Non-refereed
Pulsars
Neutron stars

It may interest you

  • Non-refereed
    Massive characterisation of subgiants and red giants with TESS (Kepler and Gaia)
    TESS serves as a formidable tool for investigating stellar variability. Nonetheless, the adaptation of methodologies employed in other space missions, such as Kepler, to deduce long stellar rotation periods or solar-like stellar pulsations has been a challenge. The advent of multiple sectors of data for most stars every two years with the extended
    García, Rafael A. et al.

    Advertised on:

    9
    2024
    Bibcode
    2024tkas.confE.123G
    Citations
    0
  • Non-refereed
    Signature of the spin-down stalling in the stellar magnetic activity
    Once main-sequence (MS) solar-like stars transitioned from the saturated to the unsaturated regime in magnetic activity, their evolution was perceived as monotonic, with rotation rate and activity gradually decaying. However, Kepler revolutionized this perspective, showing that the unsaturated regime splits into different regimes. One transition
    Santos, Ângela R. G. et al.

    Advertised on:

    8
    2024
    Bibcode
    2024tkas.confE.103S
    Citations
    0
  • Non-refereed
    Spectroscopy and asteroseismic modelling of the red giant binary system KIC 10841730
    Stellar modelling is crucial for understanding the structure and age of stars. The accuracy of a stellar model is limited by the constraints from observations and the theory behind the physical processes. Gravitationally bound stars of a binary system provide an excellent opportunity for a combined study, which provides strong constraints on the
    Schimak, Lea et al.

    Advertised on:

    7
    2024
    Bibcode
    2024tkas.confE.110S
    Citations
    0