Results 31 to 40 of about 307,393 (221)
On the Detection of Binary Be Stars [PDF]
Symposium - International Astronomical Union, 1976 Possible methods for detecting the presence of a cool companion to a Be star are discussed. Photometric observations are shown to be incapable of detecting companions in all but the most extreme cases. Spectroscopic investigation is also unlikely to yield many new discoveries.
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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 ...
Yan-Fei Jiang, Scott Tremaine
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Properties of Binary Systems in a One-dimensional Approximation
The Astrophysical Journal, 2023 Evolutionary calculations for stars in close binary systems are in high demand to obtain better constraints on gravitational-wave source progenitors, understand transient events from stellar interactions, and more.
Ali Pourmand, Natalia Ivanova
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Gravity darkening in binary stars [PDF]
Astronomy & Astrophysics, 2012 Context.Interpretation of light curves of many types of binary stars requires the inclusion of the (cor)relation between surface brightness and local effective gravity. Until recently, this correlation has always been modeled by a power law relating the flux or the effective temperature and the effective gravity, namely T_eff g_eff^ . Aims. We look
Michel Rieutord +3 more
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Potential Importance of Binary Evolution in UV-Optical Spectral Fitting of Early-Type Galaxies
, 2013 Binaries are very common in galaxies, and more than half of Galactic hot subdwarf stars, which are thought as a possible origin of UV-upturn of old stellar populations, are found in binaries.
Chen, Li +4 more
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Binary Neutron Star Mergers After GW170817
Frontiers in Astronomy and Space Sciences, 2020 The first combined detection of gravitational waves and electromagnetic signals from a binary neutron star (BNS) merger in August 2017 (an event named GW170817) represents a major landmark in the ongoing investigation of these extraordinary systems.
Riccardo Ciolfi, Riccardo Ciolfi
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Binary Stars in Upper Scorpius [PDF]
The Astronomical Journal, 2019 Abstract To address the statistics of binary stars in the 8 Myr old Upper Scorpius (USco) star formation region, we conducted a speckle interferometric survey of 614 association members more massive than 0.4 (spectral types earlier than M3V) based on the list of Luhman et
Andrei Tokovinin, Cesar Briceño
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, 2011 [abridged] The galactic field's late-type stellar single and binary population is calculated on the supposition that all stars form as binaries in embedded star clusters.
Bate +74 more
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High-resolution optical and infrared spectroscopic observations of Cir X-1 [PDF]
, 1999 We present new optical and infrared (IR) observations of Cir X-1 taken near apastron. Both sets of spectra show asymmetric emission lines. Archival optical observations show that an asymmetric Hα emission line has been in evidence for the past 20 years ...
Fender, R, Johnston, HM, Wu, K
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The Orbital Architecture of Qatar-6: A Fully Aligned Three-body System?
The Astronomical Journal, 2023 The evolutionary history of an extrasolar system is, in part, fossilized through its planets’ orbital orientations relative to the host star’s spin axis.
Malena Rice +7 more
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