MPS: Sunrise II: A Second Look at the Sun

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bystander
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MPS: Sunrise II: A Second Look at the Sun

Post by bystander » Sat Mar 25, 2017 1:48 am

Sunrise II: A Second Look at the Sun
Max Planck Institute for Solar System Research | 2017 Mar 24

Oscillating fibrils, explosive increases in temperature, and the footprints of coronal loops: 13 articles published today provide an overview of the results of the second flight of the balloon-borne solar observatory Sunrise.
[img3="The solar observatory Sunrise is borne by a helium balloon to a float height of more than 35 kilometers. (Credit: MPS)"]http://www.mps.mpg.de/4851660/standard_ ... 383385.jpg[/img3][hr][/hr]
During its two flights in 2009 and 2013, the balloon-borne solar observatory Sunrise experienced a unique view of our Sun: from a height of more than 35 kilometers and equipped with the largest solar telescope that had ever left Earth, Sunrise was able to resolve structures with a size of 50 kilometers in the Sun’s ultraviolet (UV) light. The journal Astrophysical Journal Supplement now devotes a total of 13 articles to the results of the second flight of Sunrise. These are complemented by four articles based on data from the first flight that have now been analyzed. In this way, the special edition paints the most comprehensive and detailed picture of the boundary layer between the visible surface of the Sun and its atmosphere in ultraviolet light. The Special Issue reports, among other things, on hot explosions, oscillating fibril-like structures, and the origins of huge plasma flows. The Max Planck Institute for Solar System Research (MPS) in Germany, head of the Sunrise project, has a key stake in all 17 publications. ...

http://asterisk.apod.com/viewtopic.php?t=21979

Overview of the Special Issue on the First Science Results from the Second Flight of Sunrise - Sami K. Solanki The Second Flight of the Sunrise Balloon-borne Solar Observatory:
Overview of Instrument Updates, the Flight, the Data, and First Results - S. K. Solanki et al A Tale of Two Emergences: Sunrise II Observations of Emergence Sites in a Solar Active Region - R. Centeno et al Solar Coronal Loops Associated with Small-scale Mixed Polarity Surface Magnetic Fields - L. P. Chitta et al Photospheric Response to an Ellerman Bomb-like Event—An Analogy
of Sunrise/IMaX Observations and MHD Simulations - S. Danilovic et al Morphological Properties of Slender Ca II H Fibrils Observed by Sunrise II - R. Gafeira et al Oscillations on Width and Intensity of Slender Ca II H Fibrils from Sunrise/SuFI - R. Gafeira et al Kinematics of Magnetic Bright Features in the Solar Photosphere - S. Jafarzadeh et al Transverse Oscillations in Slender Ca II H Fibrils Observed with Sunrise/SuFI - S. Jafarzadeh et al High-frequency Oscillations in Small Magnetic Elements Observed with Sunrise/SuFI - S. Jafarzadeh et al Slender Ca II H Fibrils Mapping Magnetic Fields in the Low Solar Chromosphere - S. Jafarzadeh et al Brightness of Solar Magnetic Elements As a Function of Magnetic Flux at High Spatial Resolution - F. Kahil et al Moving Magnetic Features Around a Pore - A. J. Kaithakkal et al Convectively Driven Sinks and Magnetic Fields in the Quiet-Sun - Iker S. Requerey et al Spectropolarimetric Evidence for a Siphon Flow along an Emerging Magnetic Flux Tube - Iker S. Requerey et al A New MHD-assisted Stokes Inversion Technique - T. L. Riethmüller et al Estimation of the Magnetic Flux Emergence Rate in the Quiet Sun from Sunrise Data - H. N. Smitha et al Magneto-static Modeling from Sunrise/IMaX: Application to an Active Region Observed with Sunrise II - T. Wiegelmann et al
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Re: MPS: Sunrise II: A Second Look at the Sun

Post by neufer » Sat Mar 25, 2017 3:42 am

https://en.wikipedia.org/wiki/Sunrise_(telescope) wrote:
<<The Sunrise balloon-borne solar observatory consists of a 1m aperture Gregory telescope, a UV filter imager, an imaging vector polarimeter, an image stabilization system and further infrastructure. The first science flight of Sunrise yielded high-quality data that reveal the structure, dynamics and evolution of solar convection, oscillations and magnetic fields at a resolution of around 100 km in the quiet Sun. The strong [ozone] absorption of UV radiation by the Earth's atmosphere makes it challenging to carry out ground-based observations at these wavelengths. A balloon mission reaching altitudes of above 30 km benefits from a reduction of UV absorption by 99%, making engineering solutions for the telescope easier. The launch site was in the arctic region to make uninterrupted observation of the Sun over several days possible. The telescope has a 1 metre primary mirror that directs the 1 kW of solar radiation to the first focal point where 99% of the radiation is reflected out of the telescope, the remaining light is transferred into several instruments. The one metre diameter primary mirror is made from a glass ceramic zerodur, it is the central part of the gondola of nearly 2 tons. Solar panels of 1.5 kW output power are used to power the onboard equipment and a hard disk array of 2 x 2.4 Terabyte is used to store the data during flight.
  • CWS, Correlating Wavefront Sensor is a CCD camera with 1 kHz read-outs responsible generate the images necessary for image stabilization and proper alignment.

    SUFI, Sunrise Filter Imager observes the sun in five distinct wavelengths 214, 300, 312, 388 and 397 nm, on a 2048 x 2048 pixel CCD, through a filter wheele.

    IMaX, Imaging Magnetograph eXperiment observes the Zeeman splitting of the iron line (FeI) around 525 nm. The observed field of view is 50 x 50 arcseconds.>>
Art Neuendorffer
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