| Zugriffsnummer | 29638 |
| Dokumenttyp | Zeitschriftenartikel |
| Sprache | Englisch |
| Titel | First results of the SUMER telescope and spectrometer on SOHO – I. Spectra and Spectroradiometry |
| Autor(in); Institution |
Wilhelm, K.; Max-Planck-Institut für Aeronomie, Katlenburg-Lindau, GERMANY
Lemaire, P.; Institut d’Astrophysique Spatiale, Unité Mixte CNRS – Université, Paris, FRANCE
Curdt, W.; Max-Planck-Institut für Aeronomie, Katlenburg-Lindau, GERMANY
Schühle, U.; Max-Planck-Institut für Aeronomie, Katlenburg-Lindau, GERMANY
Marsch, E.; Max-Planck-Institut für Aeronomie, Katlenburg-Lindau, GERMANY
Poland, A. I.; NASA/Goddard Space Flight Center (GSFC), Greenbelt, Maryland, USA
Jordan, S. D.; NASA/Goddard Space Flight Center (GSFC), Greenbelt, Maryland, USA
Thomas, R. J.; NASA/Goddard Space Flight Center (GSFC), Greenbelt, Maryland, USA
Hassler, D. M.; High Altitude Observatory/NCAR, Boulder, Colorado, USA
Huber, M. C. E.; ESA, Space Science Department, Noordwijk, THE NETHERLANDS
Vial, J.-C.; Institut d’Astrophysique Spatiale, Unité Mixte CNRS – Université, Paris, FRANCE
Kühne, Michael; 7.3, Temperatur und Wärme, PTB-Berlin
Siegmund, O. H. W.; The University of California, California, USA
Gabriel, A.; Institut d’Astrophysique Spatiale, Unité Mixte CNRS – Université, Paris, FRANCE
Timothy, J. G.; The University of New Brunswick, Fredericton, CANADA
Grewing, M.; Astronomisches Institut, Tübingen, GERMANY
Feldman, U.; Naval Research Laboratory, Washington, D.C., USA
Hollandt, Jörg; 7.11, UV- und VUV-Radiometrie, PTB-Berlin
Brekke, P.; The University of Oslo, Oslo, NORWAY
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| Quelle/Jahr | Solar Physics: 170 (1997), 1, 75 - 104 |
| ISSN | 0038-0938 (PRINT) ; 1573-093X (ONLINE) |
| DOI | |
| Verlag | Springer Netherlands |
| Zusammenfassung | SUMER – the Solar Ultraviolet Measurements of the Emitted Radiation instrument on the Solar and Heliospheric Observatory (SOHO) – observed its first light on January 24, 1996, and subsequently obtained a detailed spectrum with detector B in the wavelength range from 660 to 1490 Å (in first order) inside and above the limb in the north polar coronal hole. Using detector A of the instrument, this range was later extended to 1610 Å. The second-order spectra of detectors A and B cover 330 to 805 Å and are superimposed on the first-order spectra. Many more features and areas of the Sun and their spectra have been observed since, including coronal holes, polar plumes and active regions. The atoms and ions emitting this radiation exist at temperatures below 2 × 106 K and are thus ideally suited to investigate the solar transition region where the temperature increases from chromospheric to coronal values. SUMER can also be operated in a manner such that it makes images or spectroheliograms of different sizes in selected spectral lines. A detailed line profile with spectral resolution elements between 22 and 45 mÅ is produced for each line at each spatial location along the slit. From the line width, intensity and wavelength position we are able to deduce temperature, density, and velocity of the emitting atoms and ions for each emission line and spatial element in the spectroheliogram. Because of the high spectral resolution and low noise of SUMER, we have been able to detect faint lines not previously observed and, in addition, to determine their spectral profiles. SUMER has already recorded over 2000 extreme ultraviolet emission lines and many identifications have been made on the disk and in the corona. |
Zitierung
Wilhelm, K., Lemaire, P., Curdt, W., Schühle, U., Marsch, E., Poland, A. I., Jordan, S. D., Thomas, R. J., Hassler, D. M., Huber, M. C. E., Vial, J.-C., Kühne, M., Siegmund, O. H. W., Gabriel, A., Timothy, J. G., Grewing, M., Feldman, U., Hollandt, J., & Brekke, P. (1997). First results of the SUMER telescope and spectrometer on SOHO – I. Spectra and Spectroradiometry. Solar Physics, 170(1), 75–104. https://doi.org/10.1023/a:1004923511980