Laboratory Calibrations of Fe xii–xiv Line-Intensity Ratios for Electron Density Diagnostics
Abstract
In this work, we have used an electron beam ion trap to measure electron-density-diagnostic line-intensity ratios for extreme ultraviolet lines from Fe xii, xiii, and xiv at wavelengths of ≈185–205 and 255–276 Å. These ratios can be used as density diagnostics for astrophysical spectra and are especially relevant to solar physics. We found that density diagnostics using the Fe xiii 196.53/202.04 and the Fe xiv 264.79/274.21 and 270.52A/274.21 line ratios are reliable using the atomic data calculated with the Flexible Atomic Code (FAC). On the other hand, we found a large discrepancy between the FAC theory and experiment for the commonly used Fe xii (186.85 + 186.88)/195.12 line ratio. These FAC theory calculations give results similar to the data tabulated in CHIANTI, which are commonly used to analyze solar observations. Our results suggest that the discrepancies seen between solar coronal density measurements using the Fe xii (186.85 + 186.88)/195.12 and Fe xiii 196.54/202.04 line ratios are likely due to issues with the atomic calculations for Fe xii.
- Authors:
-
- Columbia Univ., New York, NY (United States). Columbia Astrophysics Lab.
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Univ. of California, Berkeley, CA (United States)
- Publication Date:
- Research Org.:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA); National Aeronautics and Space Administration (NASA)
- OSTI Identifier:
- 1823217
- Report Number(s):
- LLNL-JRNL-791539
Journal ID: ISSN 0004-637X; 990650; TRN: US2215608
- Grant/Contract Number:
- AC52-07NA27344; NNX16AF10G
- Resource Type:
- Accepted Manuscript
- Journal Name:
- The Astrophysical Journal
- Additional Journal Information:
- Journal Volume: 890; Journal Issue: 1; Journal ID: ISSN 0004-637X
- Publisher:
- IOP Publishing
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 74 ATOMIC AND MOLECULAR PHYSICS; 79 ASTRONOMY AND ASTROPHYSICS; Atomic spectroscopy; Atomic physics; Spectroscopy; Laboratory astrophysics; Solar corona
Citation Formats
Arthanayaka, Thusitha, Beiersdorfer, Peter, Brown, Gregory V., Gu, Ming Feng, Hahn, Michael, Hell, Natalie, Lockard, Tom, and Savin, Daniel W. Laboratory Calibrations of Fe xii–xiv Line-Intensity Ratios for Electron Density Diagnostics. United States: N. p., 2020.
Web. doi:10.3847/1538-4357/ab67b4.
Arthanayaka, Thusitha, Beiersdorfer, Peter, Brown, Gregory V., Gu, Ming Feng, Hahn, Michael, Hell, Natalie, Lockard, Tom, & Savin, Daniel W. Laboratory Calibrations of Fe xii–xiv Line-Intensity Ratios for Electron Density Diagnostics. United States. https://doi.org/10.3847/1538-4357/ab67b4
Arthanayaka, Thusitha, Beiersdorfer, Peter, Brown, Gregory V., Gu, Ming Feng, Hahn, Michael, Hell, Natalie, Lockard, Tom, and Savin, Daniel W. Thu .
"Laboratory Calibrations of Fe xii–xiv Line-Intensity Ratios for Electron Density Diagnostics". United States. https://doi.org/10.3847/1538-4357/ab67b4. https://www.osti.gov/servlets/purl/1823217.
@article{osti_1823217,
title = {Laboratory Calibrations of Fe xii–xiv Line-Intensity Ratios for Electron Density Diagnostics},
author = {Arthanayaka, Thusitha and Beiersdorfer, Peter and Brown, Gregory V. and Gu, Ming Feng and Hahn, Michael and Hell, Natalie and Lockard, Tom and Savin, Daniel W.},
abstractNote = {In this work, we have used an electron beam ion trap to measure electron-density-diagnostic line-intensity ratios for extreme ultraviolet lines from Fe xii, xiii, and xiv at wavelengths of ≈185–205 and 255–276 Å. These ratios can be used as density diagnostics for astrophysical spectra and are especially relevant to solar physics. We found that density diagnostics using the Fe xiii 196.53/202.04 and the Fe xiv 264.79/274.21 and 270.52A/274.21 line ratios are reliable using the atomic data calculated with the Flexible Atomic Code (FAC). On the other hand, we found a large discrepancy between the FAC theory and experiment for the commonly used Fe xii (186.85 + 186.88)/195.12 line ratio. These FAC theory calculations give results similar to the data tabulated in CHIANTI, which are commonly used to analyze solar observations. Our results suggest that the discrepancies seen between solar coronal density measurements using the Fe xii (186.85 + 186.88)/195.12 and Fe xiii 196.54/202.04 line ratios are likely due to issues with the atomic calculations for Fe xii.},
doi = {10.3847/1538-4357/ab67b4},
journal = {The Astrophysical Journal},
number = 1,
volume = 890,
place = {United States},
year = {Thu Feb 13 00:00:00 EST 2020},
month = {Thu Feb 13 00:00:00 EST 2020}
}
Free Publicly Available Full Text
Publisher's Version of Record
Other availability
Search WorldCat to find libraries that may hold this journal
Save to My Library
You must Sign In or Create an Account in order to save documents to your library.
Works referenced in this record:
Extended-range grazing-incidence spectrometer for high-resolution extreme ultraviolet measurements on an electron beam ion trap
journal, November 2014
- Beiersdorfer, P.; Magee, E. W.; Brown, G. V.
- Review of Scientific Instruments, Vol. 85, Issue 11
Benchmarking atomic data for astrophysics: Fe XII
journal, March 2005
- Del Zanna, G.; Mason, H. E.
- Astronomy & Astrophysics, Vol. 433, Issue 2
High-Resolution Laboratory Measurements of Coronal Lines in the 198-218 Å Region
journal, May 2014
- Beiersdorfer, Peter; Träbert, Elmar; Lepson, Jaan K.
- The Astrophysical Journal, Vol. 788, Issue 1
HIGH-RESOLUTION LABORATORY SPECTRA OF THE λ193 CHANNEL OF THE ATMOSPHERIC IMAGING ASSEMBLY INSTRUMENT ON BOARD SOLAR DYNAMICS OBSERVATORY
journal, October 2014
- Träbert, Elmar; Beiersdorfer, Peter; Brickhouse, Nancy S.
- The Astrophysical Journal Supplement Series, Vol. 215, Issue 1
A Close Look at the Coronal Density of Procyon
journal, August 1996
- Schmitt, J. H. M. M.; Drake, J. J.; Haisch, B. M.
- The Astrophysical Journal, Vol. 467
Effects of electron spiralling on the anisotropy and polarization of photon emission from an electron beam ion trap
journal, November 1999
- Gu, M. F.; Savin, D. W.; Beiersdorfer, P.
- Journal of Physics B: Atomic, Molecular and Optical Physics, Vol. 32, Issue 22
High-precision density measurements in the solar corona: I. Analysis methods and results for Fe XII and Fe XIII
journal, December 2008
- Young, P. R.; Watanabe, T.; Hara, H.
- Astronomy & Astrophysics, Vol. 495, Issue 2
The EUV Imaging Spectrometer for Hinode
journal, March 2007
- Culhane, J. L.; Harra, L. K.; James, A. M.
- Solar Physics, Vol. 243, Issue 1
Measurements of the effective electron density in an electron beam ion trap using extreme ultraviolet spectra and optical imaging
journal, October 2018
- Arthanayaka, T. P.; Beiersdorfer, P.; Brown, G. V.
- Review of Scientific Instruments, Vol. 89, Issue 10
INTENSITY RATIO OF DENSITY-SENSITIVE LINES IN Fe IONS OBSERVED WITH A WELL-DEFINED LABORATORY PLASMA
journal, August 2011
- Nakamura, Nobuyuki; Watanabe, Etsushi; Sakaue, Hiroyuki A.
- The Astrophysical Journal, Vol. 739, Issue 1
Benchmarking atomic data for the CHIANTI atomic database: coronal lines observed by Hinode EIS
journal, January 2012
- Del Zanna, G.
- Astronomy & Astrophysics, Vol. 537
XUV electron density diagnostics for solar flares
journal, June 1979
- Dere, K. P.; Widing, K. G.; Mason, H. E.
- The Astrophysical Journal Supplement Series, Vol. 40
An Analysis of the Solar Extreme-Ultraviolet Between 50 and 300 A
journal, April 1973
- Malinovsky, L.; Heroux, Monique
- The Astrophysical Journal, Vol. 181
Measurement and Modeling of Density‐Sensitive Lines of Fe xiii in the Extreme Ultraviolet
journal, December 2008
- Yamamoto, N.; Kato, T.; Funaba, H.
- The Astrophysical Journal, Vol. 689, Issue 1
Atomic data for astrophysics: Fe xii soft X-ray lines
journal, July 2012
- Del Zanna, G.; Storey, P. J.; Badnell, N. R.
- Astronomy & Astrophysics, Vol. 543
Fe XIII DENSITY DIAGNOSTICS IN THE EIS OBSERVING WAVELENGTHS
journal, February 2009
- Watanabe, T.; Hara, H.; Yamamoto, N.
- The Astrophysical Journal, Vol. 692, Issue 2
Temperature of the ions produced and trapped in an electron‐beam ion trap
journal, January 1995
- Beiersdorfer, P.; Decaux, V.; Elliott, S. R.
- Review of Scientific Instruments, Vol. 66, Issue 1
CHIANTI - an atomic database for emission lines: I. Wavelengths greater than 50 Å
journal, October 1997
- Dere, K. P.; Landi, E.; Mason, H. E.
- Astronomy and Astrophysics Supplement Series, Vol. 125, Issue 1
Why is Boris algorithm so good?
journal, August 2013
- Qin, Hong; Zhang, Shuangxi; Xiao, Jianyuan
- Physics of Plasmas, Vol. 20, Issue 8
HIGH-RESOLUTION LABORATORY SPECTRA ON THE λ131 CHANNEL OF THE AIA INSTRUMENT ON BOARD THE SOLAR DYNAMICS OBSERVATORY
journal, February 2014
- Träbert, Elmar; Beiersdorfer, Peter; Brickhouse, Nancy S.
- The Astrophysical Journal Supplement Series, Vol. 211, Issue 1
Electron-density-sensitive Line Ratios of Fe xiii– xvi from Laboratory Sources Compared to CHIANTI
journal, February 2018
- Weller, M. E.; Beiersdorfer, P.; Soukhanovskii, V. A.
- The Astrophysical Journal, Vol. 854, Issue 2
Laboratory Measurements of Fe xxiv Line Emission: \documentclass{aastex} \usepackage{amsbsy} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{bm} \usepackage{mathrsfs} \usepackage{pifont} \usepackage{stmaryrd} \usepackage{textcomp} \usepackage{portland,xspace} \usepackage{amsmath,amsxtra} \usepackage[OT2,OT1]{fontenc} \newcommand\cyr{ \renewcommand\rmdefault{wncyr} \renewcommand\sfdefault{wncyss} \renewcommand\encodingdefault{OT2} \normalfont \selectfont} \DeclareTextFontCommand{\textcyr}{\cyr} \pagestyle{empty} \DeclareMathSizes{10}{9}{7}{6} \begin{document} \landscape $3arrow 2$ \end{document} Transitions near Excitation Threshold
journal, June 1999
- Gu, M. F.; Kahn, S. M.; Savin, D. W.
- The Astrophysical Journal, Vol. 518, Issue 2
Photometric calibration of an EUV flat field spectrometer at the advanced light source
journal, March 2003
- May, M.; Lepson, J.; Beiersdorfer, P.
- Review of Scientific Instruments, Vol. 74, Issue 3
CHIANTI – An atomic database for emission lines. Version 8
journal, October 2015
- Del Zanna, G.; Dere, K. P.; Young, P. R.
- Astronomy & Astrophysics, Vol. 582
EUV Emission Lines and Diagnostics Observed with Hinode/EIS
journal, November 2007
- Young, Peter R.; Zanna, Del Giulio; Mason, Helen E.
- Publications of the Astronomical Society of Japan, Vol. 59, Issue sp3
Chianti—An Atomic Database for Emission Lines. Xiii. soft X-Ray Improvements and Other Changes
journal, January 2013
- Landi, E.; Young, P. R.; Dere, K. P.
- The Astrophysical Journal, Vol. 763, Issue 2
Measurements of density dependent intensity ratios of extreme ultraviolet line emission from Fe X, XI, and XII
journal, May 2017
- Shimizu, Erina; Ali, Safdar; Tsuda, Takashi
- Astronomy & Astrophysics, Vol. 601
Experimental and Theoretical Evaluation of Density‐sensitive N vi , Ar xiv , and Fe xxii Line Ratios
journal, August 2004
- Chen, H.; Beiersdorfer, P.; Heeter, L. A.
- The Astrophysical Journal, Vol. 611, Issue 1
Measurement of level-specific dielectronic-recombination cross sections of heliumlike Fe xxv
journal, October 1992
- Beiersdorfer, P.; Phillips, T. W.; Wong, K. L.
- Physical Review A, Vol. 46, Issue 7
Visible spectrum of highly charged ions: The forbidden optical lines of Kr, Xe, and Ba ions in the Ar I to Kr I isoelectronic sequence
journal, December 2002
- López-Urrutia, J. R. Crespo; Beiersdorfer, P.; Widmann, K.
- Canadian Journal of Physics, Vol. 80, Issue 12
Lifetime determination of the metastable level
journal, March 2007
- Brenner, G.; López-Urrutia, J. R. Crespo; Harman, Z.
- Physical Review A, Vol. 75, Issue 3
Experimental Transition Rate of the Green Coronal Line of Fe xiv
journal, April 2003
- Beiersdorfer, P.; Trabert, E.; Pinnington, E. H.
- The Astrophysical Journal, Vol. 587, Issue 2
EXTREME-ULTRAVIOLET SPECTROSCOPY OF Fe VI-Fe XV AND ITS DIAGNOSTIC APPLICATION FOR ELECTRON BEAM ION TRAP PLASMAS
journal, April 2009
- Liang, G. Y.; Baumann, T. M.; López-Urrutia, J. R. Crespo
- The Astrophysical Journal, Vol. 696, Issue 2
Measurement of the electron cyclotron energy component of the electron beam of an electron beam ion trap
journal, November 2001
- Beiersdorfer, Peter; Slater, Michelle
- Physical Review E, Vol. 64, Issue 6