Thank you for your interest in SOHO EIT data analysis.

Proposal ID Martens_12

Date of Proposal
96/05/26

name
Piet Martens

institute
ESA-SOC at SOHO EOF

address
Code 682.3
NASA-GSFC

email
pmartens@lion.nascom.nasa.gov

phone
301-286-9028

fax

proposal
Title: Spatial Power Spectra of Magnetograms and Coronal Images

Lead Investigator: Piet Martens, ESA-SOC
Team Members: Daniel Gomez, University of Buenos Aires


Summary: I propose to Fourier analyze 5 to 10 full-disk MDI
magnetograms and nearly simultaneous EIT (all 4 bands) and
Yohkoh full-disk images. Any publication resulting from this
will be withheld until EIT and MDI say it is OK to submit.

Proposal: This investigation is a continuation of similar work
on ground-based magnetograms and NIXT and Yohkoh data.

I will verify the azimuthal symmetry of the 2D spatial
power-spectra, and the power-law structure of the azimuthally
averaged spectra. A relation between the slopes of the
power-laws for magnetograms and coronal X-ray images has been
derived previously (ref. 1) and verified, but it is not a priori
clear how the EIT images fit in with to this relation -- if they
conform to our equation that indicates that the loops in EIT
images are the result of stationary heating, just like SXT loops.
If not this will pose a challenge for further theoretical
analysis.

In addition, the relationship between the slopes for the
magnetograms and coronal images allows one to distinguish
between wave heating and joule heating of the corona (ref. 1).


References:

1. "Spatial Power-Spectra from Yohkoh Soft X-Ray Images"
Petrus C. Martens and Daniel O. Gomez,
Publ. Astron. Soc. Japan 44, L187-L191 (1992).

2. "NIXT Power Spectra of X-Ray Emission from Solar Active
Regions: I. Observations"
D.O. Gomez, P.C.H. Martens, and L. Golub,
Apj 405, 767-772 (1993).

3. "NIXT Power Spectra of X-Ray Emission from Solar Active
Regions: II. Theory"
D.O. Gomez, P.C.H. Martens, and L. Golub,
Apj 405, 773-781 (1993).





inside_collab
Local EOF member, willing to provide access to the data.

consortium
no

title
Spatial Power Spectra of Magnetograms and Coronal Images


IF YOU ARE THE AUTHOR OF THE PROPOSAL
Please describe additions or updates to your proposal.

You must click the "submit" button in order to enter your proposal update. Thank you.


Return to the EIT home page.