Results 11 to 20 of about 3,667,853 (278)
The origin of very wide binary stars
, 2011 A large population of fragile, wide (> 1000 AU) binary systems exists in the Galactic field and halo. These wide binary stars cannot be primordial because of the high stellar density in star forming regions, while formation by capture in the Galactic field is highly improbable.
Kouwenhoven, M.B.N. +5 more
core +9 more sources
Widely separated binary systems of very low‐mass stars [PDF]
Astronomische Nachrichten, 2005 AbstractIn this paper we review some recent detections of wide binary brown dwarf systems and discuss them in the context of the multiplicity properties of very low‐mass stars and brown dwarfs. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Phan-Bao, N. +4 more
core +6 more sources
Wide Binary Stars in the Galactic Field - A Statistical Approach [PDF]
, 2010 This thesis focuses on the statistical properties of wide binary (WB) star systems in the Galactic field. For the present study we select a homogeneous sample covering about 675 square degrees in the direction of the NGP. It contains nearly 670,000 MS stars with apparent magnitudes between 15 and 20.5 mag and spectral classes later than G5.
Longhitano, Marco
openaire +4 more sources
Galactic perturbations on the population of wide binary stars with exoplanets [PDF]
Astronomy & Astrophysics, 2017 Aims. The aim of this work is to study the dynamical effects of the Galaxy on binary star systems with physical and orbital charac- teristics similar to those of the population of known wide binary stars with exoplanets. As secondary goal we analyse the possible consequences on the stability of a hypothetical planetary system orbiting one of the ...
J. A. Correa-Otto, R. A. Gil-Hutton
openaire +4 more sources
Discovery of a widely separated binary system of very low mass stars [PDF]
Astronomy & Astrophysics, 2005 We report our discovery of a nearby wide binary system, LP 714-37 AB. Phan-Bao et al. identified LP 714-37 as a mid-M dwarf during a cross-identification of the NLTT and DENIS catalogues. Our CCD images resolve the system into a binary with a projected angular separation of 1.8 arcsec, or 33 AU, and low-resolution optical spectra give spectral types of
Phan-Bao, N. +4 more
core +8 more sources
Extremely Wide Pairs in the World of Binary Stars
Astronomy Reports, 2023 Abstract This article raises the question of the possibility of identifying stellar pairs in which one of the components belongs to the family of near-nuclear central S-stars and the other belongs to a population of hypervelocity stars (HVSs).
G. N. Dremova +2 more
openaire +1 more source
Modelling and observations of molecules in discs around young stars [PDF]
, 2013 This thesis contains a study of molecules within circumstellar discs around young stars. Firstly, the chemistry of a disc around a young, Class 0 protostar is modelled.
Ilee, John David
core +6 more sources
The evolution of wide binary stars [PDF]
Monthly Notices of the Royal Astronomical Society, 2010 We study the orbital evolution of wide binary stars in the solar neighborhood due to gravitational perturbations from passing stars. We include the effects of the Galactic tidal field and continue to follow the stars after they become unbound. For a wide variety of initial semi-major axes and formation times, we find that the number density (stars per ...
Jiang, Yan-Fei, Tremaine, Scott
openaire +2 more sources
The distribution of wide binary stars on the sky [PDF]
Monthly Notices of the Royal Astronomical Society, 1989 Etude de la distribution de binaires larges de brillance intermediaire dans plusieurs champs des Poles Galactiques Nord et Sud totalisant environ 800 deg 2 . Une variete de tests statistiques est appliquee pour montrer que ces binaires ne sont pas distribuees selon une loi de Poisson, mais qu'une structure significative est apparente dans la ...
Sirpa Saarinen, Gerard Gilmore
openaire +1 more source
New spectroscopic binary companions of giant stars and updated metallicity distribution for binary systems [PDF]
, 2016 We report the discovery of 24 spectroscopic binary companions to giant stars. We fully constrain the orbital solution for 6 of these systems. We cannot unambiguously derive the orbital elements for the remaining stars because the phase coverage is ...
Vanzi, L. +49 more
core +1 more source