Results 21 to 30 of about 307,393 (221)

Period Change of the Contact Binary AH Tauri [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2004
New BVRI photometric observations of the contact binary AH Tau were performed with the 61 cm reflector and a 2K CCD camera at the Sobaeksan Optical Astronomy Observatory during seven nights from September to December, 2001. A total of 144 times of minima
Dongjoo Lee   +5 more
doaj   +1 more source

The Symbiotics as Binary Stars [PDF]

open access: yesInternational Astronomical Union Colloquium, 1982
AbstractSymbiotic stars have become an important testing ground of various theories of binary star evolution. Several physically different models can explain them, but in each case certain fairly restrictive conditions must be met, so if we manage to identify a definite object with a model, it will tell us a lot about the structure and evolutionary ...
openaire   +2 more sources

Binary post-AGB stars [PDF]

open access: yesSymposium - International Astronomical Union, 1997
Low and intermediate mass stars leave the Asymptotic Giant Branch (AGB) when the mass in their H-rich envelope is less than about 0.01 M⊙, and the high mass loss drops several orders of magnitude. The central star rapidly evolves to the left part of the HR diagram along a track of constant luminosity (e.g. Schönberner 1983).
van Winckel, H.   +2 more
openaire   +4 more sources

The distance variation due to mass transfer and mass loss in (13.6+8) Mand (13+10) M binary star systems

open access: yesIraqi Journal of Physics, 2019
In this research the change in the distance of the two stars in two binary star systems (13.6+8)M8and (13+10)M8 was studied, through the calculations the value  (rate of mass transfer) of the two phases of dynamical stages of mass which are mass loss ...
Mohammed R. Abdulameer
doaj   +1 more source

Short Gamma Ray Bursts as possible electromagnetic counterpart of coalescing binary systems [PDF]

open access: yes, 2010
Coalescing binary systems, consisting of two collapsed objects, are among the most promising sources of high frequency gravitational waves signals detectable, in principle, by ground-based interferometers.
A. Abramovici   +38 more
core   +1 more source

Binaries in star clusters and the origin of the field stellar population [PDF]

open access: yes, 2009
Many, possibly most, stars form in binary and higher-order multiple systems. Therefore, the properties and frequency of binary systems provide strong clues to the star-formation process, and constraints on star-formation models.
Binney J.   +9 more
core   +2 more sources

An electrically powered binary star? [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2002
accepted by ...
Mark Cropper   +4 more
openaire   +4 more sources

PRELIMINARY RESULTS OF MODELING OF LIGHT CURVES OF WW AND

open access: yesOdessa Astronomical Publications, 2017
In this work we present the preliminary results of modeling of Olson’s lybv light curves of an Algol-type binary WW And. A model of a binary star containing an accretion disk around the primary star is deployed.
S. Zola
doaj   +1 more source

The Formation of Binary Stars [PDF]

open access: yesSymposium - International Astronomical Union, 1981
The speed and storage capacity of present-day computers have stimulated the development of numerical techniques allowing the investigation of three-dimensional gas dynamical problems of astronomical interest. Of the problems that can be attacked with these techniques, that of the formation of binaries has historically attracted the greatest interest ...
openaire   +2 more sources

Unresolved Binaries and Multiples in the Intermediate Mass Range in Open Clusters: Pleiades, Alpha Per, Praesepe, and NGC 1039

open access: yesThe Astronomical Journal, 2023
In this study, we continue our project to search for unresolved binary and multiple systems in open clusters exploiting the photometric diagram (H–W2)–W1 versus W2–(BP–K) first introduced in Malofeeva et al. In particular, here we estimate the binary and
Alina A. Malofeeva   +3 more
doaj   +1 more source

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