The harmonic and sideband structure of the kilohertz quasi-periodic oscillations in Sco X-1

We use data from the <i>Rossi X-ray Timing Explorer</i> to search for harmonics and sidebands of the two simultaneous kilohertz quasi-periodic oscillations (kHz QPOs) in Sco X-1. We do not detect any of these harmonics or sidebands, with 95 per cent confidence upper limits to their power...

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Detalles Bibliográficos
Autores principales: Méndez, Mariano R., Klis, Michiel van der
Formato: Articulo
Lenguaje:Inglés
Publicado: 2000
Materias:
Ciencias Astronómicas
Accretion, accretion discs
Stars: individual: Sco X-1
Stars: neutron
Stars: oscillations
X-rays: stars
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/84393
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
Descripción
Sumario:We use data from the <i>Rossi X-ray Timing Explorer</i> to search for harmonics and sidebands of the two simultaneous kilohertz quasi-periodic oscillations (kHz QPOs) in Sco X-1. We do not detect any of these harmonics or sidebands, with 95 per cent confidence upper limits to their power between ∼1 and ∼10 per cent of the power of the upper kHz QPO. The oscillations produced at these frequencies may be attenuated in a scattering corona around the neutron star. We find that upper limits to the unattenuated power of some of the strongest theoretically predicted harmonics and sidebands are as low as ∼2per cent of the unattenuated power of the high-frequency QPO in Sco X-1.

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