Hostname: page-component-cb9f654ff-w5vf4 Total loading time: 0 Render date: 2025-08-27T18:50:42.530Z Has data issue: false hasContentIssue false
  • English
  • Français

The EUV spectral irradiance of the Sun from 1997 to date

Published online by Cambridge University Press:  26 February 2010

Giulio Del Zanna  and
Vincenzo Andretta
Giulio Del Zanna
Affiliation:
Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Wilberforce Road, Cambridge CB3 0WA, UK email: g.del-zanna@damtp.cam.ac.uk
Vincenzo Andretta
Affiliation:
INAF – Osservatorio Astronomico di Capodimonte, Salita Moiariello, 16, I-80131, Napoli, Italy email: andretta@oacn.inaf.it
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.

We present measurements of the EUV spectral irradiance we have obtained from radiance measurements with the SOHO Coronal Diagnostic Spectrometer, from 1997 to date. We discuss the contribution of the various regions of the Sun to the total EUV irradiance, and how they varied dramatically between the last two solar minima. These observations allow us to interpret spectral irradiance measurements in the EUV which have been available since 2002 with the TIMED mission. We also briefly discuss how changes in various activity indices compare with the EUV spectral variability, and the limitations of spectral modelling.

Keywords

Sun: UV radiationSun: activitysolar-terrestrial relations

References

Brekke, P., Thompson, W. T., Woods, T. N., & Eparvier, F. G. 2000, ApJ, 536, 959CrossRefGoogle Scholar
Chamberlin, P. C., Woods, T. N., Crotser, D. A., et al. 2009, GRL, 36, 5102CrossRefGoogle Scholar
Del Zanna, G., Andretta, V., Chamberlin, P. C., et al. 2009, A&A, acceptedGoogle Scholar
Foukal, P., Bertello, L., Livingston, W. C., et al. 2009, Solar Phys., 255, 229CrossRefGoogle Scholar
Haigh, J. D. 1996, Science, 272, 981CrossRefGoogle Scholar
Harrison, R. A., Sawyer, E. C., Carter, M. K., et al. 1995, Solar Phys., 162, 233CrossRefGoogle Scholar
Hovestadt, D., Hilchenbach, M., Bürgi, A., et al. 1995, Solar Phys., 162, 441CrossRefGoogle Scholar
Lean, J., Beer, J., & Bradley, R. 1995, GRL, 22, 3195CrossRefGoogle Scholar
Meehl, G. A., Arblaster, J. M., Matthes, K., Sassi, F., & van Loon, H. 2009, Science, 325, 1114CrossRefGoogle Scholar
Orlando, S., Peres, G., & Reale, F. 2004, A&A, 424, 677Google Scholar
Priest, E., Lockwood, M., Solanki, S., Wolfendale, A., & Coustenis, A. 2007, A&G, 48, 03Google Scholar
Woods, T. N., Chamberlin, P. C., Harder, J. W., et al. 2009, GRL, 36, 1101CrossRefGoogle Scholar
Woods, T. N., Eparvier, F. G., Bailey, S. M., et al. 2005, JGR (Space Physics), 110, 1312CrossRefGoogle Scholar