Results 31 to 40 of about 159,543 (291)
The Astrophysical Journal, 2023 We present a timing study of the short-period eclipsing cataclysmic variable (CV) HT Cas. Based on new eclipse times derived from our photometric monitoring and archival optical data, combined with historical timings, spanning ∼42 yr, we detect a secular
Z.-T Han +10 more
doaj +1 more source
The Search for Close Binary Evolved Stars [PDF]
International Astronomical Union Colloquium, 1989 AbstractWe report on a search for short-period binary systems composed of pairs of evolved stars. The search is being carried out concurrently with a program to characterize the kinematical properties of two different samples of stars. Each sample has produced one close binary candidate for which further spectroscopic observations are planned.
Rex A. Saffer, James Liebert
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A transiting companion to the eclipsing binary KIC002856960 [PDF]
, 2012 We present an early result from an automated search of Kepler eclipsing binary systems for circumbinary companions. An intriguing tertiary signal has been discovered in the short period eclipsing binary KIC002856960. This third body leads to transit-like
Batalha +26 more
core +2 more sources
‘Swinging Dipoles’ in Magnetic Close Binary Stars [PDF]
International Astronomical Union Colloquium, 1987 AbstractThe recently discovered phenomena in polars - Magnetic Close Binary Stars (MCBS), are discussed. Asynchronous MCBS are on the ‘propeller stage’ (which is analogous to the investigated one for neutron stars), and are synchronizing during ts ≲ 103 yr, being during this stage rapidly evolving, mass ejecting systems.
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Relativistic numerical model for close neutron-star binaries [PDF]
Physical Review D, 1996 We describe a numerical method for calculating the (3+1) dimensional general relativistic hydrodynamics of a coalescing neutron-star binary system. The relativistic field equations are solved at each time slice with a spatial 3-metric chosen to be conformally flat.
Wilson, J. R. +2 more
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Microlensing of close binary stars [PDF]
Monthly Notices of the Royal Astronomical Society, 2009 The gravity due to a multiple-mass system has a remarkable gravitational effect: the extreme magnification of background light sources along extended so-called caustic lines. This property has been the channel for some remarkable astrophysical discoveries over the past decade, including the detection and characterisation of extra-solar planets, the ...
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Radial Velocity Studies of Close Binary Stars. IX. [PDF]
The Astronomical Journal, 2004 17+ pages, 2 tables, 4 ...
Pych, Wojtek +10 more
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The Role of Multiplicity in Disk Evolution and Planet Formation [PDF]
, 2011 The past decade has seen a revolution in our understanding of protoplanetary disk evolution and planet formation in single star systems. However, the majority of solar-type stars form in binary systems, so the impact of binary companions on ...
Hillenbrand, Lynne A. +3 more
core +3 more sources
Classification of close binary stars using recurrence networks [PDF]
Chaos: An Interdisciplinary Journal of Nonlinear Science, 2019 Close binary stars are binary stars where the component stars are close enough such that they can exchange mass and/or energy. They are subdivided into semidetached, overcontact, or ellipsoidal binary stars. A challenging problem in the context of close binary stars is their classification into these subclasses based solely on their light curves ...
Sandip V. George, R. Misra, G. Ambika
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Structural biology of ferritin nanocages
FEBS Letters, EarlyView.Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley +1 more source