X-ray variability and 1mHz oscillations in TT ARI

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dc.creatorBayka, A.
dc.creatorEsendemir, A.
dc.creatorKiziloglu, U.
dc.creatorAlpar, M. A.
dc.creatorOgelman, H.
dc.creatorErcan, N.
dc.creatorIkis, G.
dc.date1995-03-13
dc.date.accessioned2026-07-07T06:31:58Z
dc.date.available2026-07-07T06:31:58Z
dc.descriptionUsing the archival ROSAT observation of TT Ari, X-ray energy spectra in different orbital phases and power spectra of the intensity time series are presented. Spectral fits show that the source gets brighter during the observation. The orbital modulation of the X-ray counting rate and bremsstrahlung temperature suggests that soft X-ray emission peaks in the orbital phase interval 0.75-0.90, when an outer disk hot spot is near the line of sight. This correlates with the orbital modulation of C IV($λ$1549) absorption. Timing analysis indicates that while the source gets brighter, the frequency of the 1mHz oscillation is not correlated with X-ray intensity. This implies that in the X-rays from TT Ari, the beat frequency model is not appropriate for explaining the changes in the 1mHz oscillations. \keywords{Accretion discs - stars: TT Ari - stars: cataclysmic variables - X-ray: binaries - X-rays
dc.descriptionuuencoded compressed postscript, 6 pages including figures, to be published by A&A
dc.identifierhttps://arxiv.org/abs/astro-ph/9503055
dc.identifierhttp://arxiv.org/abs/astro-ph/9503055
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/98768
dc.subjectAstrophysics
dc.titleX-ray variability and 1mHz oscillations in TT ARI
dc.typetext

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