LogoLogo
  • Bio
  • Fyzika
  • V médiích
  • Fotografie
  • Výstavy
  • Kontakt

    Distribution of Kilohertz QPO Frequencies and Their Ratios in the Atoll Source 4U 1636-53

    Zdeněk Stuchlík · Březen 01, 2008 · Fyzika · 0 comments
    0

    Publication date: Mar 2008

    Abstract:
    A recently published study on long term evolution of the frequencies of
    the kilohertz quasi-periodic oscillations (QPOs) in the atoll source 4U
    1636-53 concluded that there is no preferred frequency ratio in a
    distribution of twin QPOs that was inferred from the distribution of a
    single frequency alone. However, we find that the distribution of the
    ratio of actually observed pairs of kHz QPO frequencies is peaked close
    to the 3/2 value, and possibly also close to the 5/4 ratio. To resolve
    the apparent contradiction between the two studies, we examine in detail
    the frequency distributions of the lower kHz QPO and the upper kHz QPO
    detected in our data set. We demonstrate that for each of the two kHz
    QPOs (the lower or the upper), the frequency distribution in all
    detections of a QPO differs from the distribution of frequency of the
    same QPO in the subset of observations where both the kHz QPOs are
    detected. We conclude that detections of individual QPOs alone should
    not be used for calculation of the distribution of the frequency ratios.

    Authors:
    Török, G.; Abramowicz, M. A.; Bakala, P.; Bursa, M.; Horák, J.; Kluzniak, W.; Rebusco, P.; Stuchlik, Z.;

    http://adsabs.harvard.edu/abs/2008AcA….58…15T

      Facebook   Pinterest   Twitter   Google+

    Leave a Comment! Zrušit odpověď na komentář

    You must be logged in to post a comment.
    Archivy
    Copyright © 2016 Zdeněk Stuchlík