Results 1 to 10 of about 119,914 (169)
A Survey of Herbig Ae/Be Multiplicity
The Astronomical Journal, 2023 Although the majority of Herbig Ae/Be (HAEBE) stars are likely multiple systems, relatively few multiples have been identified. We aim to create a statistically significant survey of HAEBE multiplicity as a function of stellar mass, to shed light on ...
S. J. Thomas +7 more
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Universe, 2021 Radio emission from stars can be used, for example, to study ionized winds or stellar flares. The radio emission is faint and studies have been limited to few objects.
Bin Yu, Albert Zijlstra, Biwei Jiang
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The single star path to Be stars [PDF]
Astronomy & Astrophysics, 2020 Context. Be stars are rapidly rotating B main sequence stars that show line emission due to an outflowing disc. By studying the evolution of rotating single star models, we can assess their contribution to the observed Be star populations. Aims. We identify the main effects that cause single stars to approach critical rotation as functions of initial ...
Ben Hastings, Chen Wang, Norbert Langer
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On stars and Steiner stars. II [PDF]
Proceedings of the Twentieth Annual ACM-SIAM Symposium on Discrete Algorithms, 2009 A {\em Steiner star} for a set $P$ of $n$ points in $\RR^d$ connects an arbitrary center point to all points of $P$, while a {\em star} connects a point $p\in P$ to the remaining $n-1$ points of $P$. All connections are realized by straight line segments. Fekete and Meijer showed that the minimum star is at most $\sqrt{2}$ times longer than the minimum
Adrian Dumitrescu +2 more
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Emission activity of the Be star 60 Cygni [PDF]
Serbian Astronomical Journal, 2017 In this paper we present results of spectroscopic analysis of the H® line profile of the Be star 60 Cygni. We present time evolution of the equivalent width of the H® line profiles during years 1992 - 2016 and V=R variation during years 1995 ...
Šejnová K., Votruba V.
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Discrete Optimization, 2009 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Adrian Dumitrescu +2 more
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Intensity Interferometry Observations of the Hα Envelope of γCas with MéO and a Portable Telescope
The Astronomical Journal, 2023 We report on observations of the extended environment of the bright Be star γ -Cas performed using intensity interferometry measurements within its H α emission line.
Nolan Matthews +11 more
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Star Product and Star Exponential [PDF]
, 2012 This paper introduces a family of star products, parameterized by the space of complex symmetric matrices. Let us recall that Omori-Maeda-Miyazaki-Yoshioka obtained a generalization of the well-known Moyal-Weyl product by means of complex symmetric matrices.
Tomihisa, Toshio, Yoshioka, Akira
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Studying the UV Mg II Resonance Lines in 20 Be Stars
Open Astronomy, 2011 Using the GR model, we analyze the UV Mg II resonance lines in the spectra of 20 Be stars of different spectral subtypes, in order to detect the presence of satellite or discrete absorption components. The values of some physical parameters – rotational,
Antoniou A. +3 more
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Strong Variability in AzV 493, an Extreme Oe-type Star in the SMC
The Astrophysical Journal, 2023 We present 18 yr of OGLE photometry together with spectra obtained over 12 yr revealing that the early Oe star AzV 493 shows strong photometric (Δ I < 1.2 mag) and spectroscopic variability with a dominant, 14.6 yr pattern and ∼40 day oscillations.
M. S. Oey +13 more
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