Results 21 to 30 of about 6,276,609 (285)
The Astrophysical Journal, 2023 Studying a centi-parsec supermassive black hole binary (SMBHB) would allow us to explore a new parameter space in active galactic nuclei, and these objects are also potential sources of gravitational waves.
Wu Jiang +8 more
doaj +1 more source
Orbital Magnetization in Periodic Insulators [PDF]
Physical Review Letters, 2005 submitted to PRL; signs corrected in Eqs. (11), (12), (19), and (20)
T. THONHAUSER +3 more
openaire +5 more sources
The short orbital period binary star at the heart of the planetary nebula M 3-1★ [PDF]
Monthly Notices of the Royal Astronomical Society: Letters, 2018 We present the discovery of a 3h5m orbital-period binary star at the heart of the planetary nebula M 3-1 - the shortest period photometrically-variable central star known and second only to V458 Vul, in general.
David Jones +6 more
semanticscholar +1 more source
Constraints on the Size of Extra Dimensions from the Orbital Evolution of the Black-Hole X-Ray Binary XTE J1118+480 [PDF]
, 2009 In a universe of the Randall-Sundrum type, black holes are unstable and emit gravitational modes in the extra dimension. This leads to dramatically shortened lifetimes of astrophysical black holes and to an observable change of the orbital period of ...
Johannsen, Tim
core +3 more sources
The orbital period–mass ratio relation of wide sdB+MS binaries and its application to the stability of RLOF [PDF]
Monthly notices of the Royal Astronomical Society, 2018 Wide binaries with hot subdwarf-B (sdB) primaries and main sequence companions are thought to form only through stable Roche lobe overflow (RLOF) of the sdB progenitor near the tip of the red giant branch (RGB).
J. Vos +7 more
semanticscholar +1 more source
Light Curves and Period Analysis of Beta Lyrae Stars
The Astronomical Journal, 2023 We present the light-curve period analysis of 36 Beta Lyrae stars from the OMC Archive. We check the reference period of the sample by applying the phase dispersion minimization periodogram.
C. C. Cortés +3 more
doaj +1 more source
Orbital Period Increase in ES Ceti [PDF]
, 2017 We report a long-term study of the eclipse times in the 10-minute helium binary ES Ceti. The binary period increases rapidly, with P/P-dot = 6.2x10^6 yr.
Cook, Lewis +7 more
core +2 more sources
Periodic Orbit Theory of Diffraction [PDF]
Physical Review Letters, 1994 An extension of the Gutzwiller trace formula is given that includes diffraction effects due to hard wall scatterers or other singularities. The new trace formula involves periodic orbits which have arcs on the surface of singularity and which correspond to creping waves. A new family of resonances in the two disk scattering system can be well described
Vattay, G., Wirzba, A., Rosenqvist, P.
openaire +5 more sources
The cataclysmic variable orbital period gap: More evident than ever [PDF]
Astronomy & AstrophysicsRecently, large and homogeneous samples of cataclysmic variables identified by the Sloan Digital Sky Survey (SDSS) were published. In these samples, the famous orbital period gap, which is a dearth of systems in the orbital period range $ and the ...
M. R. Schreiber, D. Belloni, A. Schwope
semanticscholar +1 more source
Minimum Orbital Period of Precataclysmic Variables [PDF]
Astrophysical Journal, 2018 More than 20 precataclysmic variable (pre-CV) systems have now been discovered with very short orbital periods ranging from 250 minutes down to 68 minutes.
Lorne A. Nelson +3 more
semanticscholar +1 more source