Difference Frequency of Kilohertz QPOs Not Equal to Half the Burst Oscillation Frequency in 4U 1636–53

We have analyzed data obtained during two observations with the Rossi X-Ray Timing Explorer on 1997 January 5 and 8 of the low-mass X-ray binary (LMXB) and atoll source 4U 1636-53. We measure the frequency separation of the two simultaneous kilohertz quasi-periodic oscillations (kHz QPOs) in this so...

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Autores principales: Méndez, Mariano R., van der Klis, Michiel, van Paradijs, Jan
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 1998
Materias:
Ciencias Astronómicas
Physics
Accretion (meteorology)
Accretion disc
Oscillation
Frequency separation
Astrophysics
Binary number
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/123170
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-123170
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
Physics
Accretion (meteorology)
Accretion disc
Oscillation
Frequency separation
Astrophysics
Binary number
spellingShingle Ciencias Astronómicas
Physics
Accretion (meteorology)
Accretion disc
Oscillation
Frequency separation
Astrophysics
Binary number
Méndez, Mariano R.
van der Klis, Michiel
van Paradijs, Jan
Difference Frequency of Kilohertz QPOs Not Equal to Half the Burst Oscillation Frequency in 4U 1636–53
topic_facet Ciencias Astronómicas
Physics
Accretion (meteorology)
Accretion disc
Oscillation
Frequency separation
Astrophysics
Binary number
description We have analyzed data obtained during two observations with the Rossi X-Ray Timing Explorer on 1997 January 5 and 8 of the low-mass X-ray binary (LMXB) and atoll source 4U 1636-53. We measure the frequency separation of the two simultaneous kilohertz quasi-periodic oscillations (kHz QPOs) in this source to be 253.7±4.7 and 246.4±5.4 Hz, respectively. These values are inconsistent with being equal to 0.5 times the frequency of the 581 Hz oscillations that have been detected previously in 4U 1636-53 during type I bursts. The weighted average discrepancy is 39.5±3.5 Hz. This result shows that a simple beat-frequency interpretation of the kHz QPOs, in which the frequency of the oscillations detected during type I bursts equals the separation between the two kHz QPOs (or twice that value), is incorrect.
format Articulo
Preprint
author Méndez, Mariano R.
van der Klis, Michiel
van Paradijs, Jan
author_facet Méndez, Mariano R.
van der Klis, Michiel
van Paradijs, Jan
author_sort Méndez, Mariano R.
title Difference Frequency of Kilohertz QPOs Not Equal to Half the Burst Oscillation Frequency in 4U 1636–53
title_short Difference Frequency of Kilohertz QPOs Not Equal to Half the Burst Oscillation Frequency in 4U 1636–53
title_full Difference Frequency of Kilohertz QPOs Not Equal to Half the Burst Oscillation Frequency in 4U 1636–53
title_fullStr Difference Frequency of Kilohertz QPOs Not Equal to Half the Burst Oscillation Frequency in 4U 1636–53
title_full_unstemmed Difference Frequency of Kilohertz QPOs Not Equal to Half the Burst Oscillation Frequency in 4U 1636–53
title_sort difference frequency of kilohertz qpos not equal to half the burst oscillation frequency in 4u 1636–53
publishDate 1998
url http://sedici.unlp.edu.ar/handle/10915/123170
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AT vanderklismichiel differencefrequencyofkilohertzqposnotequaltohalftheburstoscillationfrequencyin4u163653
AT vanparadijsjan differencefrequencyofkilohertzqposnotequaltohalftheburstoscillationfrequencyin4u163653
bdutipo_str Repositorios
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