Search for dissertations about: "João Manuel da Silva Santos"

Found 2 swedish dissertations containing the words João Manuel da Silva Santos.

  2. 1. Constraints on the gas temperature in the solaratmosphere from multiwavelength inversions

    Author : João Manuel da Silva Santos; Jaime de la Cruz Rodríguez; Andreas Korn; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Sun; chromosphere; ALMA; inversions; Astronomy; astronomi;

    Abstract : In this Licentiate thesis I review the properties of the solar atmosphere and the diagnostic value ofdifferent spectral lines in the visible and ultraviolet (UV) along with the millimeter (mm) continua in theelectromagnetic spectrum of the Sun.While the solar atmosphere has been routinely observed in high-resolution from ground-based opti-cal telescopes such as the Swedish Solar Telescope (SST), and more recently in the UV from space tele-scopes such as the Interface Region Imaging Spectrograph (IRIS), radio observations lag behind despitetheir great usefulness. READ MORE

  4. 2. A multiwavelength approach to solar chromospheric heating : New insights from the millimeter continuum

    Author : João Manuel da Silva Santos; Jaime de le Cruz Rodríguez; Jorrit Leenaarts; Petr Heinzel; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Sun; chromosphere; radiative transfer; waves; reconnection; Astronomy; astronomi;

    Abstract : The chromosphere is an intermediate layer of the Sun's atmosphere where radiative equilibrium breaks down. The standard chromospheric diagnostics such as the Mg II h and k and Ca II H and K spectral lines are formed under nonlocal thermodynamic equilibrium (NLTE) and they are only partially sensitive to the local conditions. READ MORE