Results 11 to 20 of about 1,142,001 (295)

A Survey of Herbig Ae/Be Multiplicity

open access: yesThe 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
doaj   +1 more source

The single star path to Be stars [PDF]

open access: yesAstronomy & 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
openaire   +2 more sources

Radio Stars of the SKA

open access: yesUniverse, 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
doaj   +1 more source

On the evolutionary status of Be stars. I. Field Be stars near the Sun [PDF]

open access: yes, 2005
A sample of 97 galactic field Be stars were studied by taking into account the effects induced by the fast rotation on their fundamental parameters.
Baillet   +78 more
core   +6 more sources

Equatorial mass loss from Be stars [PDF]

open access: yes, 2010
Be stars are thought to be fast rotating stars surrounded by an equatorial disc. The formation, structure and evolution of the disc are still not well understood.
Anahí Granada   +6 more
core   +3 more sources

On stars and Steiner stars. II [PDF]

open access: yesProceedings 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
openaire   +2 more sources

Emission activity of the Be star 60 Cygni [PDF]

open access: yesSerbian 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.
doaj   +1 more source

On stars and Steiner stars

open access: yesDiscrete Optimization, 2009
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Adrian Dumitrescu   +2 more
openaire   +1 more source

The Circumstellar Discs of Be Stars [PDF]

open access: yes, 2010
Circumstellar discs of Be stars are thought to be formed from material ejected from a fast-spinning central star. This material possesses large amounts of angular momentum and settles in a quasi-Keplerian orbit around the star.
Carciofi, Alex C.
core   +1 more source

Intensity Interferometry Observations of the Hα Envelope of γCas with MéO and a Portable Telescope

open access: yesThe 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
doaj   +1 more source

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