Electron-impact excitation of Be-like Mg

Details Electron-impact excitation of Be-like Mg Electron-impact excitation of Be-like Mg

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008a%26a...487.1203d&link_type=abstract

Astronomy and Astrophysics, Volume 487, Issue 3, 2008, pp.1203-1208

Astronomy and Astrophysics

Astrophysics

14

Atomic Data, Techniques: Spectroscopic, Sun: Corona

Scientific paper

We present an R-matrix calculation of electron-impact excitation of Be-like Mg. The calculation is similar to that one presented for Be-like Fe by Chidichimo et al. (2005, A&A, 430, 331), and was done with the intermediate-coupling frame transformation method and including a total of 98 fine-structure levels, up to n=4. We find significant differences with the widely used n=2 excitation rates of Keenan et al. (1986, Phys. Scr., 34, 216), calculated by interpolating R-matrix calculations along the Be-like sequence. We present a list of the most important transitions and a few comparisons with SOHO SUMER and CDS/GIS spectra of the solar corona. We show that previous long-standing discrepancies between observed and predicted line intensities are now resolved. We also show how temperatures of the solar corona were significantly underestimated. For example, a coronal hole inter-plume temperature of 850 000 K found by Wilhelm et al. (1998, ApJ, 500, 1023) is now revised to 1 160 000 K.
Full dataset of excitation and radiative data are only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/487/1203

Affiliated with

Also associated with

No associations

Rating

Electron-impact excitation of Be-like Mg does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Electron-impact excitation of Be-like Mg, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electron-impact excitation of Be-like Mg will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1289873