J 2008

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

ABRAMOWICZ, Marek, Pavel BAKALA, Zdeněk STUCHLÍK and Gabriel TÖRÖK

Basic information

Original name

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

Name (in English)

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

Edition

Acta Astronomica, PL - Polská republika, 2008, 0001-5237

Other information

Type of outcome

Článek v odborném periodiku

Field of Study

10308 Astronomy

Confidentiality degree

není předmětem státního či obchodního tajemství

Organization unit

Institute of physics in Opava

UT WoS

000255383600002

Keywords in English

QPO, frequency ratio

Tags

International impact, Reviewed

Links

LC06014, research and development project. MSM4781305903, plan (intention).
Změněno: 6/4/2021 13:31, Mgr. Pavlína Jalůvková

Abstract

V originále

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 distributionof 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.

In English

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 distributionof 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.