J/A+A/577/A25 3D model for fitting forbidden OI 6300 line (Socas-Navarro, 2015)
The solar oxygen abundance from an empirical three-dimensional model.
Socas-Navarro H.
<Astron. Astrophys. 577, A25 (2015)>
=2015A&A...577A..25S 2015A&A...577A..25S
ADC_Keywords: Models
Keywords: Sun: abundances - Sun: atmosphere - Sun: granulation -
Sun: photosphere - stars: abundances - stars: atmospheres
Abstract:
The oxygen abundance in the solar photosphere, and consequently the
solar metallicity itself, is still a controversial question with
far-reaching implications in many areas of astrophysics. This paper
presents a new determination obtained by fitting the forbidden OI
line at 6300Å with an observational 3D model. The approach
presented here is novel because previous determinations were based
either on 1D empirical stratifications or on 3D theoretical models.
The resulting best-fit abundances are logε(O)=8.90 and
logε(Ni)=6.15. Nevertheless, by introducing minor tweaks in
the model and the procedure, it is possible to retrieve very different
values, even down to logε(O)=8.70. This extreme sensitivity of
the abundance to possible systematic effects is not specific to this
particular work, but probably reflects the real uncertainty inherent
to all abundance determinations based on a prescribed model
atmosphere.
Description:
model_in.mod and model_out.mod contain three-dimensional cubes where
each column represents the physical stratification of each pixel, with
the _in and the _out suffix referring to the two atmospheric
components coexisting with the filling factor. The code manual has
details on the file format and the variables stored.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
model_in.mod 512 889398 Tthree-dimensional cubes "in"
model_out.mod 512 889398 three-dimensional cubes "out"
read_model.pro 80 251 ReadMe of the programs (in IDL)
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Acknowledgements:
Hector Socas-Navarro, hsocas(at)iac.es
(End) Patricia Vannier [CDS] 28-Apr-2015