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A Massive Pulsar in a Compact Relativistic Binary
Introduction Neutron stars with masses above 1.8 solar masses (M☉), possess extreme gravitational fields, which may give rise to phenomena outside general relativity. These strong-field deviationsExpand
The origin of subdwarf B stars – I. The formation channels
Subdwarf B (sdB) stars (and related sdO/sdOB stars) are believed to be helium-core-burning objects with very thin hydrogen-rich envelopes. In recent years it has become increasingly clear fromExpand
The origin of subdwarf B stars – II
We have carried out a detailed binary population synthesis (BPS) study of the formation of subdwarf B (sdB) stars and related objects (sdO, sdOB stars) using the latest version of the BPS codeExpand
The mass of the white dwarf in the recurrent nova U Scorpii
ABSTRA C T We present spectroscopy of the eclipsing recurrent nova U Sco. The radial velocity semi- amplitude of the primary star was found to be KWa 93 ^ 10 km s 21 from the motion of the wings ofExpand
Mass transfer between double white dwarfs
Three periodically variable stars have recently been discovered (V407 Vul, P=9.5 min; ES Cet, P=10.3 min; RX J0806.3+1527, P=5.3 min) with properties that suggest that their photometric periods areExpand
A radio-pulsing white dwarf binary star
The discovery is reported of a white dwarf/cool star binary that emits from X-ray to radio wavelengths and the spin-down power is an order of magnitude larger than that seen in electromagnetic radiation, which suggests that AR Sco is primarily spin-powered. Expand
A Gaseous Metal Disk Around a White Dwarf
A metal-rich gas disk around a moderately hot and young white dwarf implies that planetary systems may form around high-mass stars. Expand
Emission line formation in accretion discs
Examen de la formation des raies d'emission a partir de disques d'accretion et developpement d'expressions simples pour calculer les profils de raies optiquement minces ou epaisses
SDSS unveils a population of intrinsically faint cataclysmic variables at the minimum orbital period
We discuss the properties of 137 cataclysmic variables (CVs) which are included in the Sloan Digital Sky Survey (SDSS) spectroscopic data base, and for which accurate orbital periods have beenExpand
Spectroscopy of $A0620-00$: the mass of the black hole and an image of its accretion disc
We present spectra of the black hole binary A0620-00 taken at Hα and Hβ to study the distribution of emission-line flux from its accretion disc. Using the spectra of Hα, we have measured the K-typeExpand