Results 21 to 30 of about 6,397,764 (332)
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
Sporadic radio pulses from a white dwarf binary at the orbital period [PDF]
Nature AstronomyRecent observations have revealed rare, previously unknown flashes of cosmic radio waves lasting from milliseconds to minutes, with a periodicity of minutes to an hour.
I. D. Ruiter +16 more
semanticscholar +1 more source
Precise measures of orbital period, before and after nova eruption for QZ Aurigae [PDF]
Monthly notices of the Royal Astronomical Society, 2019 For the ordinary classical nova QZ Aurigae (which erupted in 1964), we report 1317 magnitudes from 1912--2016, including four eclipses detected on archival photographic plates from long before the eruption.
B. Schaefer +9 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
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
The Superoutburst Duration versus Orbital Period Relation for AM CVn Stars [PDF]
Astronomical Journal, 2019 We examine the relationship between superoutburst duration tdur and orbital period Porb in AM CVn ultra-compact binary systems. We show that the previously determined steep relation derived by Levitan et al.
J. Cannizzo, G. Ramsay
semanticscholar +1 more source
CVs Around the Minimum Orbital Period
Acta Polytechnica CTU Proceedings, 2015 We discussed features of Cataclysmic Variables at the period minimum. In general, most of them must be WZ Sge-type objects. Main characteristics of the prototype star (WZ Sge) are discussed. A part of WZ Sge-type objects has evolved past the period limit
S. Zharikov, G. Tovmassian
doaj +1 more source
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
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 +2 more sources