Results 51 to 60 of about 6,276,609 (285)
Orbital Period Changes in WZ Sagittae [PDF]
, 2017 We report a long-term (1961–2017) study of the eclipse times in the dwarf nova WZ Sagittae, in an effort to learn its rate of orbital-period change. Some wiggles with a timescale of 20–50 years are apparent, and a connection with the ∼23 year interval ...
J. Patterson +21 more
semanticscholar +1 more source
The American Mathematical Monthly, 1920 Mode of access: Internet.
Moulton, Forest Ray, 1872-1952. +5 more
openaire +1 more source
Periodic orbits of period 3 in the disc [PDF]
Nonlinearity, 1994 Let f be an orientation preserving homeomorphism of the disc D2 which possesses a periodic point of period 3. Then either f is isotopic, relative the periodic orbit, to a homeomorphism g which is conjugate to a rotation by 2 pi /3 or 4 pi /3, or f has a periodic point of least period n for each n in N*.
openaire +4 more sources
The Origin of Universality in the Inner Edges of Planetary Systems
The Astrophysical Journal Letters, 2023 The characteristic orbital period of the innermost objects within the galactic census of planetary and satellite systems appears to be nearly universal, with P on the order of a few days. This paper presents a theoretical framework that provides a simple
Konstantin Batygin +2 more
doaj +1 more source
ON THE ORIGIN OF THE SUB-JOVIAN DESERT IN THE ORBITAL-PERIOD–PLANETARY-MASS PLANE [PDF]
, 2016 Transit and radial velocity observations indicate a dearth of sub-Jupiter-mass planets on short-period orbits, outlined roughly by two oppositely sloped lines in the period–mass plane.
T. Matsakos, A. Königl
semanticscholar +1 more source
Mean Orbital Elements for Geosynchronous Orbit - II - Orbital inclination, longitude of ascending node, mean longitude [PDF]
Journal of Astronomy and Space Sciences, 1990 The osculating orbital elements include the mean, secular, long period, and short period terms. The iterative algorithm used for conversion of osculating orbital elements to mean orbital elements is described.
Kyu-Hong Choi +3 more
doaj
Light curve solutions and out-of-eclipse variability of KIC 10031409, KIC 11228612, KIC 11403216 and KIC 11913071 [PDF]
Serbian Astronomical Journal, 2017 We carried out light curve solutions of four detached binaries observed by Kepler. As a result, their orbital inclinations, temperatures and relative stellar radii were determined.
Kjurkchieva D., Atanasova T.
doaj +1 more source
A reduced orbital period for the supermassive black hole binary candidate in the quasar PG 1302-102? [PDF]
, 2015 Graham et al. (2015) have detected a 5.2 year periodic optical variability of the quasar PG 1302-102 at redshift $z=0.3$, which they interpret as the redshifted orbital period $(1+z)t_{\rm bin}$ of a putative supermassive black hole binary (SMBHB).
D. D’Orazio +4 more
semanticscholar +1 more source
A Detailed Study of 2S 0114+650 with the RXTE [PDF]
, 2008 We present the results of a detailed study of the high mass X-ray binary 2S 0114+650 made with the pointed instruments onboard the Rossi X-ray Timing Explorer.
Aab +56 more
core +1 more source