Results 21 to 30 of about 524,810 (295)

Atmospheric and Fundamental Parameters of the Individual Components of Multiple Stellar Systems

open access: yesThe 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

CCD measurements of double and multiple stars at NAO Rozhen: II [PDF]

open access: yesSerbian 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

Multiplicity of Chemically Peculiar Stars [PDF]

open access: yes, 2007
7 pages, 4 figures, to appear in the Proceedings of the ESO Workshop "Multiple Stars across the H-R Diagram"
Hubrig, S., Ageorges, N., Schoeller, M.
openaire   +2 more sources

Chemical characterization of the globular cluster NGC 5634 associated to the Sagittarius dwarf spheroidal galaxy [PDF]

open access: yes, 2017
As part of our on-going project on the homogeneous chemical characterization of multiple stellar populations in globular clusters (GCs), we studied NGC 5634, associated to the Sagittarius dwarf spheroidal galaxy, using high-resolution spectroscopy of red
Bragaglia, Angela   +7 more
core   +2 more sources

Euler-Apéry Type Multiple Zeta Star Values and Multiple t-Star Values

open access: yesWSEAS TRANSACTIONS ON MATHEMATICS, 2022
By introducing an extra binomial factor in the summands of multiple zeta star series, we can define the Euler-Apéry type multiple zeta star series. Their convergent values at positive integers are called Euler-Apéry type multiple zeta star values. In this paper we establish several recurrence relations about these values and a parametric variant by the
Ce Xu, Jianqiang Zhao
openaire   +3 more sources

Towards multiple-star population synthesis [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2009
The multiplicities of stars, and some other properties, were collected recently by Eggleton & Tokovinin, for the set of 4559 stars with Hipparcos magnitude brighter than 6.0 (4558 excluding the Sun). In this paper I give a numerical recipe for constructing, by a Monte Carlo technique, a theoretical ensemble of multiple stars that resembles the ...
openaire   +2 more sources

Dust Around T Tauri Stars [PDF]

open access: yesJournal 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

Numerical evidence for `multi-scalar stars' [PDF]

open access: yes, 2002
We present a class of general relativistic soliton-like solutions composed of multiple minimally coupled, massive, real scalar fields which interact only through the gravitational field.
D. Kaup   +23 more
core   +2 more sources

Multiple Stellar Populations in Metal-poor Globular Clusters with JWST: A NIRCam View of M92

open access: yesThe 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

Eclipsing Binaries in Multiple Star Systems [PDF]

open access: yesSymposium - 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

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