Hydrogen Lyman emission through the solar cycle
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Northeast Harbor 2009 Werner Curdt 1 Hydrogen Lyman emission through the solar cycle Co-workers: H. Tian L. Teriaca ner Curdt -Planck-Institut für Sonnensystemforschung
description
Hydrogen Lyman emission through the solar cycle. Werner Curdt Max-Planck-Institut für Sonnensystemforschung. Co-workers: H. Tian L. Teriaca. Outline: Motivation Irradiance data through the cycle - Lyman alpha - other lines Radiance data / line profiles - Lyman alpha - PowerPoint PPT Presentation
Transcript of Hydrogen Lyman emission through the solar cycle
Northeast Harbor 2009 Werner Curdt 1
Hydrogen Lyman emission through the solar cycle
Co-workers:H. TianL. Teriaca
Werner CurdtMax-Planck-Institut für Sonnensystemforschung
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Outline:
Motivation Irradiance data through the cycle
- Lyman alpha- other lines
Radiance data / line profiles- Lyman alpha- Lyman beta- Lyman continuum
The role of the magnetic field Conclusion
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Multi-spacecraft observations (e.g., GOES, UARS, SOHO, SORCE)compilation by C. Fröhlich
spectral irradiances at 1 AU
X-rays1 - 8 Å
EUV30040 Å
Ly-12155 Å
UV1600 Å
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Ly- Ly-
Lemaire et al. 2005
Ly- and Ly- spectral irradiance variation
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Solar minimum1996
SOHO lost1998
solar spectral radiance variability
Schühle et al. (2000)
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June 24 and 26, 2008
June 25
July 2 (Ly- & Ly-)
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Ly- profile fordifferent- radiances- velocities
Curdt et al. 2008
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Ly- radiance / photons s-1 m-2
Ly-
r
adia
nce
Ly- / Ly- photon ratio = 188 1
significantly higher thanVernazza & Reeves (1978)Lemaire (2005)
cotemporal Ly- and Ly- data
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cotemporal Ly- and Ly- profiles
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B deep revearsal
A flat topped
Tian et al. 2009a
cotemporal rasters in Ly- and Ly-
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Center to limb variationin a polar coronal hole
Tian et al. 2009b
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CH QS, limb QS, disk
Xia 2003Tian et al. 2009b
Ly- and Ly- profiles of disk and CH emission
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radiance distributions of Ly-, Ly-, Si III, and O VI
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Tb = 6300 K
Tb = 7000 K
cotemporal radiance bins in QS Lyman continuum
Wilhelm & Kalkofen 2003
Te = 9900 K
Te = 8000 K
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quiet Sun
sunspot
Curdt et al. 2001
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