7 research outputs found

    Solar astronomy

    Get PDF
    An overview is given of modern solar physics. Topics covered include the solar interior, the solar surface, the solar atmosphere, the Large Earth-based Solar Telescope (LEST), the Orbiting Solar Laboratory, the High Energy Solar Physics mission, the Space Exploration Initiative, solar-terrestrial physics, and adaptive optics. Policy and related programmatic recommendations are given for university research and education, facilitating solar research, and integrated support for solar research

    Solar low-lying cool loops and their contribution to the transition region EUV output

    Full text link
    In the last 30 years, the existence of small and cool magnetic loops (height < 8 Mm, T < 10^5 K) has been proposed and debated to explain the increase of the DEM (differential emission measure) towards the chromosphere. We present hydrodynamic simulations of low-lying cool loops to study their conditions of existence and stability, and their contribution to the transition region EUV output. We find that stable, quasi-static cool loops (with velocities < 1 km/s) can be obtained under different and more realistic assumptions on the radiative losses function with respect to previous works. A mixture of the DEMs of these cool loops plus intermediate loops with temperatures between 10^5 and 10^6 K can reproduce the observed emission of the lower transition region at the critical turn-up temperature point (T ~ 2x10^5 K) and below T = 10^5 K.Comment: Accepted for publication in A&A on Nov 25th 201

    Observations of the Sun at Vacuum-Ultraviolet Wavelengths from Space. Part II: Results and Interpretations

    Full text link

    Solar astrophysics

    No full text

    Recent Progress and Future Prospects in Solar Physics, and Their Relevance for Planet Earth

    No full text

    A New View of the Solar Interface Region from the Interface Region Imaging Spectrograph (IRIS)

    No full text

    Solar Science with the Atacama Large Millimeter/Submillimeter Array—A New View of Our Sun

    No full text
    corecore