Results 31 to 40 of about 202,502 (193)

Under-Developed and Under-Utilized Eclipsing Binary Model Capabilities [PDF]

Journal of Astronomy and Space Sciences, 2012
Existing but largely unused binary star model capabilities are examined. An easily implemented scheme is parameterization of starspot growth and decay that can stimulate work on outer convection zones and their dynamos.
R. E. Wilson
doaj   +1 more source

Mass Transfer in Mira-Type Binaries

Open Astronomy, 2012
Detached, symbiotic binaries are generally assumed to interact via Bondi-Hoyle-Littleton (BHL) wind accretion. However, the accretion rates and outflow geometries that result from this mass-transfer mechanism cannot adequately explain the observations of
Mohamed S., Podsiadlowski Ph.
doaj   +1 more source

Optical Observations with Milliarcsecond Resolution of Stars, Their Environments and Companions [PDF]

Journal of Astronomy and Space Sciences, 2012
Observations with milliarsecond resolution using the Navy Optical Interferometer have been obtained for a number of stellar systems which include high-mass binaries, eclipsing binaries, and radio stars.
Jason J. Sanborn, Robert T. Zavala
doaj   +1 more source

Dynamics of black holes in de Sitter spacetimes [PDF]

, 2012
Nonlinear dynamics in cosmological backgrounds has the potential to teach us immensely about our Universe, and also to serve as prototype for nonlinear processes in generic curved spacetimes.
Cardoso, Vitor, Gualtieri, Leonardo, Herdeiro, Carlos, Sperhake, Ulrich, Witek, Helvi, Zilhão, Miguel   +5 more
core   +2 more sources

New Symbiotic Stars Monitored with the Hermes Spectrograph: A Case Study of Orbital Hα Modulation

Open Astronomy, 2012
We present new orbital elements for two symbiotic systems involving a giant of spectral type S, namely V420 Hya and ER Del. These orbital elements are compared with existing elements for S-type binaries and for symbiotic binaries with M-giant primaries ...
Jorissen Alain, Van Eck S., Dermine T., Van Winckel H., Gorlova N.   +4 more
doaj   +1 more source

THE DEPENDENCE OF ON- AND OFF-STATE GENERATIONS IN CLASSICAL MICROQUASARS FROM THE DISK DENSITY. 3-D NUMERICAL HYDRODYNAMICAL SIMULATIONS OF THE HIGH AND LOW MASS ACCRETION RATE IN ACCRETION DISK IN MICROQUASAR CYG X-1

Odessa Astronomical Publications, 2018
In the present work we have computed and have compared the on- and off- generations in low and high mass accretion rate accretion disks. The comparison shows that in the case of low mass accretion rate in disk (10−10 solar mass per year) the ON-state time
V. Nazarenko
doaj   +1 more source

Secular evolution of compact binaries near massive black holes: gravitational wave sources and other exotica

, 2012
The environment near super massive black holes (SMBHs) in galactic nuclei contain a large number of stars and compact objects. A fraction of these are likely to be members of binaries.
Abadie, Amaro-Seoane, Antonini, Antonini, Antonini, Antonini, Antonini, Bartko, Baruteau, Belczynski, Binney, Blaes, Damour, DePoy, Do, Duquennoy, Eggleton, Fabio Antonini, Ford, Freitag, Gebhardt, Gebhardt, Ghez, Gillessen, Ginsburg, Gould, Gould, Gualandris, Hagai B. Perets, Hansen, Heggie, Hollywood, Hopman, Hopman, Hopman, Kobulnicky, Lada, Madigan, Madigan, Manchester, Martins, Mason, Mazeh, Merritt, Mikkola, Miller, Miller, Muno, Naoz, Ott, Peeples, Perets, Perets, Perets, Perets, Perets, Perets, Prodan, Rafelski, Raghavan, Remage Evans, Spitzer, Thompson, Wen, Wu   +64 more
core   +1 more source

Improved Detection Rates for Close Binaries Via Astrometric Observations of Gravitational Microlensing Events [PDF]

, 1999
In addition to constructing a Galactic matter mass function free from the bias induced by the hydrogen-burning limit, gravitational microlensing allows one to construct a mass function which is less affected by the problem of unresolved binaries (Gaudi &
Alard C., Ansari R., Ansari R., Cheongho Han, Dominik M., Duquennoy A., Kroupa P., Kyongae Chang, Paczynski B., Schneider P., Udalski A., Witt H., Zhao H.   +12 more
core   +3 more sources

Binary Cumulants

Advances in Applied Mathematics, 2000
The author considers binary sequences (i.e. having letters from the set \(\{0,1\})\), and defines binary cumulants for joint probability distributions on binary sequences of finite length. Distributions on binary sequences of finite length are related to solve some fundamental mathematical problems (e.g. Hilbert's 17th problem).
openaire   +2 more sources

Binary clustering

Discrete Applied Mathematics, 2008
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Jean-Pierre Barthélemy, François Brucker   +1 more
openaire   +2 more sources