E-Print Archive

There are 4035 abstracts currently viewable.


Search:

Advanced Search
Options
Main Page Add New E-Print Submitter
Information
Feedback
News Help/FAQ About Preferences
Manage Key Phrase
Notification
Sun-as-a-Star, Chromospheric Lines, 1974-2009 View all abstracts by submitter

John Harvey   Submitted: 2009-11-10 15:01

We update the McMath-Pierce spectral line scan archives for Ca II K, He I 10830 A, Ca II 8542 A, and H I 6562 A, both for full disk and center disk. The Ca K3 intensity feature displays a peak-to-peak activity cycle modulation of ~37% and He 10830 Å about 100%. SOLIS observations of the Ca K index suggest a cycle 23-24 minimum in late 2008 followed by a 0.7% rise by late 2009. Other McMath-Pierce indices display no evidence yet of cycle 24. Center-disk Ca K index measurements (optically averaged over the central 2-arcmin), show no particular response to cycle activity, i.e. the quiet disk is constant. A similar null response is found for the center-disk Wilson-Bappu effect.

Authors: Livingston, W., White, O. R., Wallace, L., Harvey, J.
Projects:

Publication Status: NSO Workshop 25, to be published in Mem. S. A. It.
Last Modified: 2009-11-14 09:51
Go to main E-Print page  On the Correlation between Spectra of Solar Microwave Bursts and Proton Fluxes near the Earth  FORMATION OF TORUS-UNSTABLE FLUX ROPES AND ELECTRIC CURRENTS IN ERUPTING SIGMOIDS  Edit Entry  Download Preprint  Delete Entry 

Key
Go to main E-Print pageGo to main E-Print page.
Previous AbstractPrevious Abstract.
Next AbstractNext Abstract.
Download PreprintDownload Preprint.
Submitter's HomepageSubmitters Homepage.
Edit EntryEdit Entry.
View All Abstracts By SubmitterView all abstracts by submitter.
Delete AbstractDelete abstract.

Latest Entries
Why Does the Solar Corona Abnormally Rotate Faster Than the Photosphere?
Impacts On Proton Fluxes Observed During Different Interplanetary Conditions
Coronal Loop Seismology Using Standing Kink Oscillations With a Lookup Table
Data-Optimized Coronal Field Model: I. Proof of Concept
Coronal Bright Points
Difference of source regions between fast and slow coronal mass ejections
Invited Review: Signatures of Magnetic Flux Ropes in the Low Solar Atmosphere Observed in High Resolution
Do Kepler superflare stars really include slowly-rotating Sun-like stars ? - Results using APO 3.5m telescope spectroscopic observations and Gaia-DR2 data -
Magnetically Induced Current Piston for Generating Extreme-ultraviolet Fronts in the Solar Corona
Magnetic Field Dynamics and Varying Plasma Emission in Large-scale Coronal Loops
Nonlinear Evolution of Ion Kinetic Instabilities in the Solar Wind
What determines the X-ray intensity and duration of a solar flare?
Fast Magnetoacoustic Wave Trains with Time-dependent Drivers
Three-dimensional reconstruction of CME-driven shock-streamer interaction from radio observations: a different take on the diagnostics of coronal magnetic fields
The soft X-ray spectrometer polarimeter SolpeX
Variable emission mechanism of a Type IV radio burst
Inference of magnetic field strength and density from damped transverse coronal waves
Frequency-Distance Structure of Solar Radio Sources Observed by LOFAR
The birth of a coronal mass ejection
Properties of slow magnetoacoustic oscillations of solar coronal loops by multi-instrumental observations

Related Pages
MSU Solar Physics.
Max Millennium Science Mail Archive.
Max Millennium Message of the Day Mail Archive.
Max Millennium Flare Catalog

Archive Maintainer
Alisdair Davey



© 2003 Solar Physics Group - Montana State University