Vicente Domingo

Publications (2)0 Total impact

• Source

  Available from: Wolfgang Schmidt

  Article: Magnetic loops in the quiet Sun

  Thomas Wiegelmann, Sami K. Solanki, Juan Borrero, Valentin Martinez Pillet, J. C. del Toro Iniesta, Vicente Domingo, J. A. Bonet Navarro, Peter Barthol, Achim Gandorfer, Michael Knoelker, Wolfgang Schmidt, Alan M. Title
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  ABSTRACT: We investigate the fine structure of magnetic fields in the atmosphere of the quiet Sun. We use photospheric magnetic field measurements from {\sc Sunrise}/IMaX with unprecedented spatial resolution to extrapolate the photospheric magnetic field into higher layers of the solar atmosphere with the help of potential and force-free extrapolation techniques. We find that most magnetic loops which reach into the chromosphere or higher have one foot point in relatively strong magnetic field regions in the photosphere. $91%$ of the magnetic energy in the mid chromosphere (at a height of 1 Mm) is in field lines, whose stronger foot point has a strength of more than 300 G, i.e. above the equipartition field strength with convection. The loops reaching into the chromosphere and corona are also found to be asymmetric in the sense that the weaker foot point has a strength $B < 300$ G and is located in the internetwork. Such loops are expected to be strongly dynamic and have short lifetimes, as dictated by the properties of the internetwork fields. Comment: accepted for ApJL Sunrise special issue, 8 Pages, 4 Figures
  09/2010;
• Source

  Available from: Wolfgang Schmidt

  Article: The Sunrise Mission

  Peter Barthol, Achim Gandorfer, Sami K. Solanki, Manfred Schüssler, Bernd Chares, Werner Curdt, Werner Deutsch, Alex Feller, Dietmar Germerott, Bianca Grauf, [......], Alberto Álvarez-Herrero, Lola Sabau-Graziati, Christoph Widani, Peter Haberler, Klaus Härtel, Dirk Kampf, Thorsten Levin, Isabel Pérez Grande, Angel Sanz-Andrés, Elke Schmidt
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  ABSTRACT: The first science flight of the balloon-borne \Sunrise telescope took place in June 2009 from ESRANGE (near Kiruna/Sweden) to Somerset Island in northern Canada. We describe the scientific aims and mission concept of the project and give an overview and a description of the various hardware components: the 1-m main telescope with its postfocus science instruments (the UV filter imager SuFI and the imaging vector magnetograph IMaX) and support instruments (image stabilizing and light distribution system ISLiD and correlating wavefront sensor CWS), the optomechanical support structure and the instrument mounting concept, the gondola structure and the power, pointing, and telemetry systems, and the general electronics architecture. We also explain the optimization of the structural and thermal design of the complete payload. The preparations for the science flight are described, including AIV and ground calibration of the instruments. The course of events during the science flight is outlined, up to the recovery activities. Finally, the in-flight performance of the instrumentation is briefly summarized. Comment: 35 pages, 17 figures
  09/2010;