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Showing 1 to 8 of 8 for “"bright points"”.
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High resolution spectroscopy of photospheric bright points
Photospheric bright points are proxies for small-scale magnetic flux concentrations. <br>These magnetic elements are thought to be the building blocks of the solar magnetic field <br>and are important to understand many physical processes on the Sun, e.g. the variability of the solar irradiance. …
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Application of adaptive optics to the spectroscopic investigation of small-scale solar structures
We study bright points, umbral dots and the G-band using a two-dimensional spectrometer and an Adaptive Optics system, which allows us to record high-resolution dopplergrams and residual intensity images. We find evidence that bright points are smaller than 120 km in diameter. Bright points are …
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Spectroscopy of small scale magnetic structures in the solar photosphere
… the presence of the so-called G-band <br>bright points is revealed. <br>They are interpreted as small-scale magnetic field <br>concentrations that are embedded in the convective flow field of the <br>solar photosphere. <br>As manifestations of small scale magnetic fields, bright points …
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Coexistence of Slow Magnetoacoustic Waves and Thermal Limit Cycles in a Coronal Bright Point
Coronal bright points (BPs) are clusters of small-scale loops ubiquitous on the solar surface observed in extreme ultraviolet (EUV) and X-ray wavelengths. We analyse characteristics of oscillations in EUV emissions observed by the Atmospheric Imaging Assembly (AIA) on board the Solar Dynamics …
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The 3-D topology of magnetic fields in and around sunspots
… stable at all. Such field concentrations produce brightenings in the G band, where a lot of spectral lines of the CH molecule are present. Inside magnetic fields, the density is reduced, as the magnetic pressure contributes to the pressure balance equation. Thus, the reduced density allows to see …
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High resolution observations of magnetohydrodynamic shocks in the solar atmosphere
… pores, magnetic flux ropes, and magnetic bright points.
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Unearth: Revealing the Effects of Stellar Activity on Exoplanet Host Stars
… due to enhanced contributions of e.g. magnetic bright points and plage, which act as a source of additional line broadening. An extension of this work looked at HARPS-N Solar Telescope data, where similar ‘relative spectra’ were created for the Sun, making use of the unique Sun-as-a-star …
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PROPERTIES AND CORRELATION OF FLARES AND CORONAL MASS EJECTIONS AND THEIR POSSIBLE RELEVANCE ON THE SOUTHERN NIGHT SKY BACKGROUND : A STATISTICAL STUDY
… sunspots, faculae, filaments, active regions, bright points, coronal holes, etc. The occurrence of these phenomena is variable, depending on the so-called activity cycle, characterized by a period of 11 years. Moreover, in some situations, the magnetic field that permeates the active regions, …