Hostname: page-component-586b7cd67f-t7fkt Total loading time: 0 Render date: 2024-11-23T03:36:12.485Z Has data issue: false hasContentIssue false
  • English
  • Français

Monitoring solar activity with PEPSI

Published online by Cambridge University Press:  03 March 2020

Ekaterina Dineva ,
Carsten Denker ,
Klaus G. Strassmeier ,
Ilya Ilyin  and
Alexei A. Pevtsov
Ekaterina Dineva
Affiliation:
Leibniz Institute for Astrophysics Potsdam (AIP), An der Sternwarte 16, 14882 Potsdam, Germany Institute for Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24/25, 14476 Potsdam-Golm, Germany
Carsten Denker
Affiliation:
Leibniz Institute for Astrophysics Potsdam (AIP), An der Sternwarte 16, 14882 Potsdam, Germany
Klaus G. Strassmeier
Affiliation:
Leibniz Institute for Astrophysics Potsdam (AIP), An der Sternwarte 16, 14882 Potsdam, Germany
Ilya Ilyin
Affiliation:
Leibniz Institute for Astrophysics Potsdam (AIP), An der Sternwarte 16, 14882 Potsdam, Germany
Alexei A. Pevtsov
Affiliation:
National Solar Observatory, 3665 Discovery Drive, Boulder, CO 80303, U.S.A.
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Synoptic Sun-as-a-star observations are carried out with the Potsdam Echelle Polarimetric and Spectroscopic Instrument (PEPSI), which receives light from the Solar Disk-Integration (SDI) telescope. Daily spectra are produced with a high signal-to-noise ratio, providing access to unprecedented quasi-continuous, long-term, disk-integrated spectra of the Sun with high spectral and temporal resolution. We developed tools to monitor and study solar activity on different time-scales ranging from daily changes, over periods related to solar rotation, to annual and decadal trends. Strong chromospheric absorption lines, such as the Ca ii H & K λ3934 & 3968 Å lines, are powerful diagnostic tools for solar activity studies, since they trace the variations of the solar magnetic field. Other lines, such as Hα λ6563 Å line and the near-infrared (NIR) Ca ii λ8542 Å line, provide additional information on the physical properties in this highly complex and dynamic atmospheric layer. Currently, we work on a data pipeline for extraction, calibration, and analysis of the PEPSI/SDI data. We compare the SDI data with daily spectra from the Integrated Sunlight Spectrometer (ISS), which is part of the Synoptic Long-Term Investigation of the Sun (SOLIS) facility operated by the U.S. National Solar Observatory (NSO). This facilitates cross-calibration and validation of the SDI data.

Keywords

Sun: chromosphereSun: activityinstrumentation: spectrographstechniques: spectroscopicmethods: data analysis
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium A30: Astronomy in Focus XXX , August 2018 , pp. 351 - 353
Copyright
© International Astronomical Union 2020

References

Bertello, L., Ulrich, R. K., & Boyden, J. E. 2010, Sol. Phys., 264, 31 CrossRefGoogle Scholar
Ermolli, I., Shibasaki, K., Tlatov, A., & van Driel-Gesztelyi, L. 2014, Space Sci. Rev., 186, 105 CrossRefGoogle Scholar
Freeland, S. L. & Handy, B. N. 2012, SolarSoft: Programming and Data Analysis Environment for Solar Physics, Astrophysics Source Code LibraryGoogle Scholar
Keil, S. L., Henry, T. W., & Fleck, B. 1998, in ASP Conf. Ser., Vol. 140, Synoptic Solar Physics, eds. Balasubramaniam, K. S., Harvey, J., & Rabin, D., 301Google Scholar
Keller, C. U., Harvey, J. W., & Giampapa, M. S. 2003, in Proc. SPIE, Vol. 4853, Innovative Telescopes and Instrumentation for Solar Astrophysics, eds. Keil, S. L. & Avakyan, S. V., 194–204 Google Scholar
Kuckein, C., Denker, C., Verma, M., et al. 2017, in IAU Symp., Vol. 327, Fine Structure and Dynamics of the Solar Atmosphere, eds. Vargas Domnguez, S., Kosovichev, A. G., Harra, L., & Antolin, P., 20–24 Google Scholar
Kurucz, R. L., Furenlid, I., Brault, J., & Testerman, L. 1984, Solar Flux Atlas from 296 to 1300 nm (Sunspot, New Mexico: National Solar Observatory)Google Scholar
Livingston, W., Wallace, L., White, O. R., & Giampapa, M. S. 2007, Astrophys. J., 657, 1137 Google Scholar
Pevtsov, A. A., Virtanen, I., Mursula, K., Tlatov, A., & Bertello, L. 2016, Astron. Astrophys., 585, A40 Google Scholar
Schmidt, W., von der Lühe, O., Volkmer, R., et al. 2012, Astron. Nachr., 333, 796 CrossRefGoogle Scholar
Strassmeier, K. G., Ilyin, I., & Steffen, M. 2018, Astron. Astrophys., 612, A44 CrossRefGoogle Scholar