E-Print Archive

There are 3950 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
Atomic data for the X-ray lines of Fe VIII & Fe IX  

Brendan O'Dwyer   Submitted: 2011-10-06 03:57

This abstract was corrupted following database problems and is being recovered. It will be restored as quickly as possible. Any questions, please send them to Alisdair. Sorry for any incovenience.


Authors: O'Dwyer, B., Del Zanna, G., Badnell, N. R., Mason, H. E., Storey, P. J.
Projects: SDO-AIA

Publication Status: Accepted for publication in Astronomy and Astrophysics
Last Modified: 2011-10-06 11:40
Go to main E-Print page  Edit Entry  Download Preprint  Submitter's Homepage Delete Entry 

SDO/AIA response to coronal hole, quiet Sun, active region and flare plasma  

Brendan O'Dwyer   Submitted: 2010-08-31 14:01

We examine the contribution of spectral lines and continuum emission to the EUV channels of the Atmospheric Imaging Assembly (AIA) on the Solar Dynamics Observatory (SDO) in different regions of the solar atmosphere. Synthetic spectra were obtained using the CHIANTI atomic database and sample differential emission measures for coronal hole, quiet Sun, active region and flare plasma. These synthetic spectra were convolved with the effective area of each channel, in order to determine the dominant contribution in different regions of the solar atmosphere. We highlight the contribution of particular spectral lines which under certain conditions can affect the interpretation of SDO/AIA data.

Authors: B. O'Dwyer, G. Del Zanna, H. E. Mason, M. A. Weber, D. Tripathi
Projects: None

Publication Status: Accepted for publication in Astronomy and Astrophysics.
Last Modified: 2010-09-01 08:06
Go to main E-Print page  Edit Entry  Download Preprint  Submitter's Homepage Delete Entry 

Hinode EIS Observations of a Limb Active Region  

Brendan O'Dwyer   Submitted: 2010-08-31 13:29

We have carried out a study of an active region close to the solar limb using observations from the Extreme-ultraviolet Imaging Spectrometer (EIS) and the X-Ray Telescope (XRT) on board Hinode. The electron density and temperature distributions of the coronal emission have been determined using emission line intensity ratios. Differential emission measure (DEM) analysis and the emission measure (EM) loci technique were used to examine the thermal structure of the emitting plasma as a function of distance from the limb. The highest temperature and electron density values are found to be located in the core of the active region, with a peak electron number density value of 1.9 x 1010 cm-3 measured using the Fe XII 186.887 A to 192.394 Å line intensity ratio. The plasma along the line of sight in the active region was found to be multi-thermal at different distances from the limb. The EIS and XRT DEM analyses appear to be in agreement in the temperature interval from log T = 6.5 - 6.7. Our results provide new constraints for models of coronal heating in active regions.

Authors: B. O'Dwyer, G. Del Zanna, H. E. Mason, Alphonse C. Sterling, D. Tripathi, P. R. Young
Projects: Hinode/EIS,Hinode/XRT

Publication Status: Accepted for publication in Astronomy and Astrophysics.
Last Modified: 2010-09-01 08:07
Go to main E-Print page  Edit Entry  Download Preprint  Submitter's Homepage Delete Entry 


Key
Go to main E-Print pageGo to main E-Print page.
Download PreprintDownload Preprint.
Submitter's HomepageSubmitters Homepage.
Edit EntryEdit Entry.
Delete AbstractDelete abstract.

Abstracts by Author
Atomic data for the X-ray lines of Fe VIII & Fe IX
SDO/AIA response to coronal hole, quiet Sun, active region and flare plasma
Hinode EIS Observations of a Limb Active Region

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