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Title: Density Determinations of the Coronae of Cool Stars Using a Newly Assigned Pair of Fe Xiv Lines in the Spectra of α Canis Minor, α Centauri, and the Sun [Density determinations of the coronae of cool stars using a newly assigned pair of Fe XIV lines in the spectra of alpha Canis Minor, alpha Centauri, and the Sun.]

Journal Article · · The Astrophysical Journal (Online)
 [1];  [2];  [3];  [4];  [4]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Physics Division; Univ. of California, Berkeley, CA (United States). Space Sciences Lab.
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Physics Division; Univ. of Erlangen-Nuremberg, Erlangen (Germany)
  3. Univ. of California, Berkeley, CA (United States). Space Sciences Lab.
  4. Univ. of Puerto Rico, San Juan, PR (United States). Dept. of Chemistry and the Chemical Physics Program
+ Show Author Affiliations

We identified a previously unassigned pair of lines between 169 and 170 Å in the coronae of cool stars. Here, we attribute these lines to Fe xiv and show that their intensity ratio is sensitive to the electron density. Using observations taken with the Low Energy Transmission Grating Spectrometer of the Chandra X-ray Observatory we infer a density of log (ne/cm-3) = 10.2 ± 0.7 and 10.3 ± 0.8 from the newly identified line pair in the coronae of Procyon and α Cen A, respectively.

Research Organization:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE; European Space Agency
Grant/Contract Number:
AC52-07NA27344; 4000114313115/NL/CB
OSTI ID:
1400091
Report Number(s):
LLNL-JRNL-676952; TRN: US1703097
Journal Information:
The Astrophysical Journal (Online), Vol. 815, Issue 1; ISSN 1538-4357
Publisher:
Institute of Physics (IOP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 5 works
Citation information provided by
Web of Science

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Cited By (1)

High-resolution Laboratory Measurements of Coronal Lines near the Fe ix Line at 171 Å journal February 2018

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Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
79 ASTRONOMY AND ASTROPHYSICS
atomic processes
line formation
stars coronae
stars individual (Procyon
Alpha Centauri)
Sun: X-rays
gamma-rays