Results 1 to 10 of about 115,902 (249)
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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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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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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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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ISO Observations of Be Stars [PDF]
International Astronomical Union Colloquium, 2000 AbstractWe discuss the infrared spectral energy distribution of Be stars, focusing on new results obtained with the Infrared Space Observatory. The 60-160 μm flux of some Be stars is higher than expected, which may be due to cold dust or an outer disk component with enhanced densities.
Waters, L.B.F.M. +8 more
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Infrared Spectroscopy of Be Stars [PDF]
Symposium - International Astronomical Union, 1994 FeII emission lines are present in a variety of astrophysical objects and, in particular, in Be stars, where in some situations they can also be seen in absorption. Selvelli & Araujo (1984) studied a sample of classical Be stars that have FeII emission lines in the optical region.
R.M. Torres +2 more
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Long-term optical photometric monitoring of the FUor star V900 Mon [PDF]
Serbian Astronomical Journal, 2021 We present results from photometric monitoring of V900 Mon, one of the newly discovered and still under-studied object from the FU Orionis type. The FUor phenomenon is very rarely observed, but it is essential for stellar evolution.
Semkov E.H., Peneva S.P., Ibryamov S.I.
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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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Seismology of southern Be stars [PDF]
Symposium - International Astronomical Union, 1994 We have started in 1990 a search for moving bumps in the HeI λ 667.8 nm of mainly southern, bright Be stars. The objects of our sample have been selected on the basis of photometric variability (Cuypers et al., 1989). High resolution (R≥ 30,000), high signal-to-noise ratio (S/R≥ 300) spectroscopic observations have been performed at the brazilian ...
Eduardo Janot-Pacheco +1 more
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