The Solar Argon Abundance

  title={The Solar Argon Abundance},
  author={Katharina Lodders},
  journal={The Astrophysical Journal},
  pages={607 - 611}
  • K. Lodders
  • Published 24 October 2007
  • Physics, Geology
  • The Astrophysical Journal
The solar argon abundance cannot be directly derived by spectroscopic observations of the solar photosphere. The solar argon abundance is evaluated from solar wind measurements, nucleosynthetic arguments, observations of B stars, H II regions, planetary nebulae, and noble gas abundances measured in Jupiter’s atmosphere. These data lead to a recommended argon abundance of N(Ar) = 91,200 ± 23,700 (on a scale where Si = 106 atoms). The recommended abundance for the solar photosphere [on a scale… 

Figures and Tables from this paper

Argon Abundances in the Solar Neighborhood: Non-LTE Analysis of Orion Association B-Type Stars

Argon abundances have been derived for a sample of B main-sequence stars in the Orion association. The abundance calculations are based on non-LTE (NLTE) metal line-blanketed model atmospheres


Observations of He-like and H-like Ar (Ar xvii and Ar xviii) lines at 3.949 Å and 3.733 Å, respectively, with the RESIK X-ray spectrometer on the CORONAS-F spacecraft, together with temperatures and


Recently we discussed an enhancement of the abundance of Ar xiv relative to Ca xiv near a sunspot during a flare, observed in spectra recorded by the Extreme-ultraviolet Imaging Spectrometer (EIS) on

Sunspots, Starspots, and Elemental Abundances

Element abundances in the solar photosphere, chromosphere, transition region, and corona are key parameters for investigating sources of the solar wind and for estimating radiative losses in the

New Solar Flare Calcium Abundances with No Surprises: Results from the Solar Maximum Mission Bent Crystal Spectrometer

The calcium abundance in flare plasmas is estimated using X-ray spectra from the Solar Maximum Mission Bent Crystal Spectrometer (BCS) during the decays of 194 flares (Geostationary Operational

Hydrogen fluence in Genesis collectors: Implications for acceleration of solar wind and for solar metallicity

NASA's Genesis mission was flown to capture samples of the solar wind and return them to the Earth for measurement to determine the chemical and isotopic composition of the Sun with significantly better precision than known before, and abundance data are reported.

Analysis of the FUSE Spectrum of the Hot, Evolved Star GD 605

We present an analysis of the atmospheric properties of the evolved, hydrogen-rich object GD 605 using FUSE, IUE, and optical spectra in conjunction with non-LTE (NLTE) model atmospheres and


Solar X-ray spectra from the REntgenovsky Spektrometr s Izognutymi Kristalami (RESIK) crystal spectrometer on the CORONAS-F spacecraft (spectral range 3.3–6.1 Å) are analyzed for 33 flares using a



Solar System Abundances and Condensation Temperatures of the Elements

Solar photospheric and meteoritic CI chondrite abundance determinations for all elements are summarized and the best currently available photospheric abundances are selected. The meteoritic and solar

Element Abundances in the Upper Atmospheres of the Sun and Stars: Update of Observational Results

We review observational progress in the determination of element abundances in the solar corona, largely due to the new capabilities offered by the instrumentation on the SOHO satellite. Many new

The determination of element abundances in the solar neighborhood from B-type stellar spectra. I: Argon

The coude spectrograph and CCD camera on the coude feed telescope at the Kitt Peak National Observatory, have been used to obtain high-resolution (0.09 A FWHM), high signal-to-noise (200)

Neon Abundances in B Stars of the Orion Association: Solving the Solar Model Problem?

We report on non-LTE Ne abundances for a sample of B-type stellar members of the Orion association. The abundances were derived by means of non-LTE fully metal-blanketed model atmospheres and

What Is the Neon Abundance of the Sun?

We have evolved a series of 13 complete solar models that utilize different assumed heavy-element compositions. Models that are based upon the heavy-element abundances recently determined by Asplund

Elemental Abundances in the Solar Upper Atmosphere Derived by Spectroscopic Means

The composition of the solar photosphere is believed to be uniform. Indeed a quantity that does not vary with solar surface location or with a particular solar feature, i.e., no observational

Solar Flare Abundances of Potassium, Argon, and Sulphur

The absolute abundance of potassium has been determined for the first time from X-ray solar flare line and continuum spectra. The absolute and relative abundances of Ar and S have also been

Jupiter Formed with More Tar than Ice

Elemental abundances in Jupiter determined from Galileo probe measurements are compared to recently revised solar system abundances. When normalized to the abundance of sulfur, the most abundant

Sulfur, Chlorine, and Argon Abundances in Planetary Nebulae. IV. Synthesis and the Sulfur Anomaly

We have compiled a large sample of O, Ne, S, Cl, and Ar abundances that have been determined for 85 Galactic planetary nebulae in a consistent and homogeneous manner using spectra extending from 3600

Abundances of the elements: Meteoritic and solar