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- National Institute for Subatomic PhysicsNL871 papers
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- Istituto Nazionale di Fisica Nucleare, Sezione di BolognaIT517 papers
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31 papers · 2 filters
The Temperature and Cooling Age of the White-Dwarf Companion to the Millisecond Pulsar PSR B1855+09
M. H. van Kerkwijk, J. F. Bell, V. M. Kaspi +1
We report on Keck and {\em Hubble Space Telescope} observations of the binary millisecond pulsar PSR B1855+09. We detect its white-dwarf companion and measure $\mv=25.90\pm0.12$ an…
Stagnation and Infall of Dense Clumps in the Stellar Wind of tau Scorpii
J. Christopher Howk, Joseph Cassinelli, Jon Bjorkman +1
Observations of the B0.2V star tau Scorpii have revealed unusual stellar wind characteristics: red-shifted absorption in the far-ultraviolet O VI resonance doublet up to +250 km/s,…
The radio source B 1834+620: A double-double radio galaxy with interesting properties
Arno P. Schoenmakers, A. G. de Bruyn, H. J. A. Rottgering +1
We present a study of the peculiar radio galaxy B 1834+620. It is characterised by the presence of a 420-kpc large edge-brightened radio source which is situated within, and well a…
Radio galaxies with a `double-double' morphology: II - The evolution of double-double radio galaxies and implications for the alignment effect in FRII sources
Christian R. Kaiser, A. P. Schoenmakers, H. J. A. Rottgering
A Double-Double Radio Galaxy (DDRG) is defined as consisting of a pair of double radio sources with a common centre. In this paper we present an analytical model in which the pecul…
Radio galaxies with a `double-double' morphology: I - Analysis of the radio properties and evidence for interrupted activity in active galactic nuclei
Arno P. Schoenmakers, A. G. de Bruyn, H. J. A. Rottgering +2
We present four Mpc-sized radio galaxies which consist of a pair of double-lobed radio sources, aligned along the same axis, and with a coinciding radio core. We have called these…
The Timing Evolution of 4U 1630-47 During its 1998 Outburst
S. W. Dieters, T. Belloni, E. Kuulkers +8
We report on the evolution of the timing of 4U1630-47 during its 1998 outburst using data obtained with the Rossi X-ray Timing Explorer (RXTE). The count rate and position in hardn…