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EAS Publications Series, 2006
The observed brightness fluctuations and large-scale structures on the surface of the Red Supergiant Betelgeuse make the star a prime targed for future interferometric measurements. At the same time, they open the possibility to resolve these structures in numerical radiation hydrodynamics simulations of the entire star.
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The observed brightness fluctuations and large-scale structures on the surface of the Red Supergiant Betelgeuse make the star a prime targed for future interferometric measurements. At the same time, they open the possibility to resolve these structures in numerical radiation hydrodynamics simulations of the entire star.
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A giant planet undergoing extreme-ultraviolet irradiation by its hot massive-star host
Nature, 2017The amount of ultraviolet irradiation and ablation experienced by a planet depends strongly on the temperature of its host star. Of the thousands of extrasolar planets now known, only six have been found that transit hot, A-type stars (with temperatures ...
S. Gaudi +59 more
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Multi-periodic pulsations of a stripped red-giant star in an eclipsing binary system
Nature, 2013Low-mass white-dwarf stars are the remnants of disrupted red-giant stars in binary millisecond pulsars and other exotic binary star systems. Some low-mass white dwarfs cool rapidly, whereas others stay bright for millions of years because of stable ...
P. Maxted +10 more
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Giant Stars and Their Variability
2018Long-period variables (LPVs) and pulsating variables (PV) are comprised of a huge variety of stars that show great promise to any observer who wishes to take up the discipline of recording variable starlight curves. Their longer periods, and in the case of the red giant stars, large range of magnitudes, enable the observer to record over an extended ...
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Physics Today, 1976
Theorists are paying a lot of attention nowadays to the structure and evolution of highly luminous stars with low surface temperatures. These stars, referred to as “red giants” because of their color and large radii, are believed to be in an advanced phase of their evolution.
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Theorists are paying a lot of attention nowadays to the structure and evolution of highly luminous stars with low surface temperatures. These stars, referred to as “red giants” because of their color and large radii, are believed to be in an advanced phase of their evolution.
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Science, 1997
In his report “Giant planet formation by gravitational instability” ([20 June, p. 1836][1]), Alan P. Boss comments on the time scale for the dissipation of gaseous disks about young stars and the frequency of Jupiter-like planets in our Milky Way galaxy.
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In his report “Giant planet formation by gravitational instability” ([20 June, p. 1836][1]), Alan P. Boss comments on the time scale for the dissipation of gaseous disks about young stars and the frequency of Jupiter-like planets in our Milky Way galaxy.
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Publications of the Astronomical Society of the Pacific, 1989
The rotation rates and macroturbulence dispersion of 14 G and K giants were measured using Fourier reduction of spectral-line profiles. The high-spectral-resolution, high-signal-to-noise observations were taken with the Coude Echelle Spectrometer of the European Southern Observatory.
David F. Gray, R. Pallavicini
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The rotation rates and macroturbulence dispersion of 14 G and K giants were measured using Fourier reduction of spectral-line profiles. The high-spectral-resolution, high-signal-to-noise observations were taken with the Coude Echelle Spectrometer of the European Southern Observatory.
David F. Gray, R. Pallavicini
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2008
Long-period radial velocity (RV) variations were discovered over 13 years ago in the K giant stars β Gem, α Tau, and α Boo by [1]. One hypothesis for these variations was that they were caused by substellar companions with masses of 2–11 M Jupiter and orbital semi-major axes of ≈ 2 AU.
Luca Pasquini +5 more
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Long-period radial velocity (RV) variations were discovered over 13 years ago in the K giant stars β Gem, α Tau, and α Boo by [1]. One hypothesis for these variations was that they were caused by substellar companions with masses of 2–11 M Jupiter and orbital semi-major axes of ≈ 2 AU.
Luca Pasquini +5 more
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Differential rotation of giant stars
Astronomische Nachrichten, 2007AbstractFrom a set of high‐resolution spectral observations of late type giant stars we used Doppler imaging to derive time‐series temperature maps of the stellar surfaces. Using these temperature maps, it is possible to track the temporal changes of the spot features and derive estimates of the strength and sign of the differential surface rotation of
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The Photospheres of Red-Giant Stars
1981Various empirical methods for studying the physical properties of red-giant photospheres are illustrated by examples of recent studies. Certain branches of the theory of late-type photospheres, where progress has recently been made or will probably be made within a near future, are commented on.
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