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Fundamentals of Interior Modelling and Challenges in the Interpretation of Observed Rocky Exoplanets. [PDF]
Space Sci RevBaumeister P +9 more
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V3101 Cyg: A Cataclysmic Variable Born with a Brown Dwarf Donor
Ramirez S +7 more
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2020
The Sun is a G2V star with an effective temperature of 5780 K. As the nearest star to Earth and the biggest object in the solar system, it serves as a reference for fundamental astronomical parameters such as stellar mass, luminosity, and elemental abundances. It also serves as a plasma physics laboratory.
L. P. Chitta +2 more
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The Sun is a G2V star with an effective temperature of 5780 K. As the nearest star to Earth and the biggest object in the solar system, it serves as a reference for fundamental astronomical parameters such as stellar mass, luminosity, and elemental abundances. It also serves as a plasma physics laboratory.
L. P. Chitta +2 more
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1992
The photosphere is the surface of the Sun that we see, and the direct source of its energy. It is dominated by granulation, supergranulation, and magnetic fields. We discuss the significance of limb daikening, the opacity, and model structure. The magnetic fields are dominated by the network, but the weaker fields are also of great interest. We discuss
openaire +2 more sources
The photosphere is the surface of the Sun that we see, and the direct source of its energy. It is dominated by granulation, supergranulation, and magnetic fields. We discuss the significance of limb daikening, the opacity, and model structure. The magnetic fields are dominated by the network, but the weaker fields are also of great interest. We discuss
openaire +2 more sources
Solar Physics, 1968
Spectroheliograms, obtained in certain Fraunhofer lines with the 82-cm solar image at the Kitt Peak National Observatory, show a bright photospheric network having the following properties: (1) It resembles, but does not coincide with, the chromospheric network, the structure of the photospheric network being finer and more delicate than the ...
G. A. Chapman, N. R. Sheeley
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Spectroheliograms, obtained in certain Fraunhofer lines with the 82-cm solar image at the Kitt Peak National Observatory, show a bright photospheric network having the following properties: (1) It resembles, but does not coincide with, the chromospheric network, the structure of the photospheric network being finer and more delicate than the ...
G. A. Chapman, N. R. Sheeley
openaire +1 more source
Photospheric Variability of O Stars
Astrophysics and Space Science, 1994The characteristics of the line profile variations observed in optical transitions of O-type stars are reviewed. For a few well-observed stars, there is compelling evidence that the variations are due to photospheric velocity fields from one or more modes of nonradial pulsation.
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1965
The sun has a radius R = 7 × 105 km, and is situated about rE = 1.5 × 108 km from the earth. Since the mass of the sun is M= 2 × 1033 g the average density can be determined as 1.4 gcm-3. However, the density changes from 70 gem-3 at the solar centre, where the temperature is 14 × 106 °K, to 10-7 gem-3 in the photosphere.
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The sun has a radius R = 7 × 105 km, and is situated about rE = 1.5 × 108 km from the earth. Since the mass of the sun is M= 2 × 1033 g the average density can be determined as 1.4 gcm-3. However, the density changes from 70 gem-3 at the solar centre, where the temperature is 14 × 106 °K, to 10-7 gem-3 in the photosphere.
openaire +1 more source