Results 21 to 30 of about 5,074,994 (301)
Theoretical results of one class of multiderivative methods through order stars [PDF]
, 2011 Order stars are applied to Brown (K,L) methods. They are displayed pictorially for a selection of methods and are used to provide succinct proofs of existing results.
Meneguette, Messias +6 more
core +4 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. With projected separations larger than 200 AU and, consequently, having very low binding energies, WB are sensitive probes of the Galactic ...
Longhitano, Marco
core +1 more source
CCD measurements of double and multiple stars at NAO Rozhen: II [PDF]
Serbian Astronomical Journal, 2006 Using the 2-m telescope of the Bulgarian National Astronomical Observatory at Rozhen observations of twenty multiple stars were carried out during one whole night - October 30/31, and, also, during the first half of the next one - October 31. 2005.
Cvetković Z. +3 more
doaj +1 more source
A study of U Aquarii and the nucleosynthesis of neutrons and S-process elements in evolved stars of low mass [PDF]
, 2014 The origin of the extreme hydrogen deficiency observed in the R Coronae Borealis (RCrB) stars remains poorly understood. A likely mechanism for producing this deficiency is one whereby the original hydrogen envelope of the star is engulfed and ...
Malaney, Robert A.
core +2 more sources
Atmospheric and Fundamental Parameters of the Individual Components of Multiple Stellar Systems
The Astronomical Journal, 2023 We present detailed analyses of eight triple stellar systems (lying between 20 and 155 pc) and nine quadruple stellar systems (lying between 20 and 250 pc) with different configurations. Most of these systems are hierarchical.
Enas M. Abu-Alrob +2 more
doaj +1 more source
Eclipsing Binaries in Multiple Star Systems [PDF]
Symposium - International Astronomical Union, 1992 Although the majority of the known eclipsing binaries are in systems which consist of only the two eclipsing components, a significant number of them do occur as components of triple star systems or higher order multiple star systems. In this context this term is restricted to those systems whose components are in closed orbits.
openaire +1 more source
New periodic variable stars coincident with ROSAT sources discovered using SuperWASP [PDF]
, 2007 We present optical lightcurves of 428 periodic variable stars coincident with ROSAT X-ray sources, detected using the first run of the SuperWASP photometric survey. Only 68 of these were previously recognised as periodic variables.
West, Richard G. +75 more
core +1 more source
Dust Around T Tauri Stars [PDF]
Journal of Astronomy and Space Sciences, 2011 To reproduce the multiple broad peaks and the fine spectral features in the spectral energy distributions (SEDs) of T Tauri stars, we model dust around T Tauri stars using a radiative transfer model for multiple isothermal circumstellar dust shells. We
Kyung-Won Suh, Young-Joo Kwon
doaj +1 more source
Multiple Stellar Populations in Metal-poor Globular Clusters with JWST: A NIRCam View of M92
The Astrophysical Journal, 2023 Recent work on metal-intermediate globular clusters (GCs) with [Fe/H] = −1.5 and −0.75 has illustrated the theoretical behavior of multiple populations in photometric diagrams obtained with the JWST.
Tuila Ziliotto +12 more
doaj +1 more source
On the Ramsey multiplicity for stars
Discrete Mathematics, 1982 AbstractIn 1929, Ramsey proved a theorem guaranteeing that if G1,G2,…,Gk are graphs, then there exists an integer r so that if the edges of Kr are colored in any fashion with k colors a monochromatic Gi in color i exists for some i. Harary and Prins suggested the problem of deciding the minimum number of monochromatic Gi in any such coloring. It is the
openaire +2 more sources