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353 papers · 1 filter
A model for the Z-track phenomenon in GX 5-1 and observational evidence for the physical origins of the kHz QPO
N. K. Jackson, M. J. Church, M. Balucinska-Church
We present results of a combined investigation of the spectral and kHz QPO evolution around the Z-track in GX 5-1 based on high-quality RXTE data. The Extended ADC emission model p…
A Chandra X-ray view of Stephan's Quintet: Shocks and Star-formation
E. O'Sullivan, S. Giacintucci, J. M. Vrtilek +2
We use a deep Chandra observation to examine the structure of the hot intra-group medium of the compact group of galaxies Stephan's Quintet. The group is thought to be undergoing a…
A model for the Z-track phenomenon, jet formation and the kilohertz QPO based on Rossi-XTE observations of the Z-track sources
M. J. Church, M. Balucinska-Church, N. K. Jackson +1
We present a new model for the Z-track phenomenon, based on analysis of the spectral evolution around the Z-track in several Z-track sources, in which radiation pressure plays a ma…
Excitation and damping of p-mode oscillations of alpha Cen B
W. J. Chaplin, G. Houdek, Y. Elsworth +3
This paper presents an analysis of observational data on the p-mode spectrum of the star alpha Cen B and a comparison with theoretical computations of the stochastic excitation and…
The inhomogeneous response across the solar disc of unresolved Doppler velocity observations
A. M. Broomhall, W. J. Chaplin, Y. Elsworth +1
Unresolved Doppler velocity measurements are not homogenous across the solar disc (Brookes et al. 1978). We consider one cause of the inhomogeneity that originates from the BiSON i…
SMEI observations of previously unseen pulsation frequencies in gamma Doradus
N. J. Tarrant, W. J. Chaplin, Y. P. Elsworth +2
Aims: As g-mode pulsators, gamma-Doradus-class stars may naively be expected to show a large number of modes. Taking advantage of the long photometric time-series generated by the…