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A reappraisal of the solar photospheric C/O ratio

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Allende Prieto, Carlos; Lambert, David L; Asplund, Martin

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An accurate determination of photospheric solar abundances requires detailed modeling of the solar granulation and accounting for departures from local thermodynamical equilibrium (LTE). We argue that the forbidden C i line at 8727 A° is largely immune to departures from LTE and can be realistically modeled using LTE radiative transfer in a time-dependent three-dimensional simulation of solar surface convection. We analyze the [C i] line in the solar flux spectrum to derive the abundance log...[Show more]

dc.contributor.authorAllende Prieto, Carlos
dc.contributor.authorLambert, David L
dc.contributor.authorAsplund, Martin
dc.date.accessioned2002-12-09
dc.date.accessioned2004-05-19T04:57:04Z
dc.date.accessioned2011-01-05T08:30:05Z
dc.date.available2004-05-19T04:57:04Z
dc.date.available2011-01-05T08:30:05Z
dc.date.created2002
dc.identifier.issn0004-637X
dc.identifier.urihttp://hdl.handle.net/1885/40075
dc.identifier.urihttp://digitalcollections.anu.edu.au/handle/1885/40075
dc.description.abstractAn accurate determination of photospheric solar abundances requires detailed modeling of the solar granulation and accounting for departures from local thermodynamical equilibrium (LTE). We argue that the forbidden C i line at 8727 A° is largely immune to departures from LTE and can be realistically modeled using LTE radiative transfer in a time-dependent three-dimensional simulation of solar surface convection. We analyze the [C i] line in the solar flux spectrum to derive the abundance log e(C) = 8.39 ± 0.04 dex. Combining this result with our parallel analysis of [O i] λ6300, we find C/O = 0.50 ± 0.07, in agreement with the ratios measured in the solar corona from gamma-ray spectroscopy and solar energetic particles.
dc.format.extent71585 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoen_AU
dc.publisherThe American Astronomical Society
dc.sourceAstrophysical Journal, The
dc.subjectconvection
dc.subjectline
dc.subjectformation
dc.subjectSun
dc.subjectabundences
dc.subjectphotosophere
dc.titleA reappraisal of the solar photospheric C/O ratio
dc.typeJournal article
local.description.refereedyes
local.identifier.citationmonthjul
local.identifier.citationpagesL137-L140
local.identifier.citationpublicationThe Astrophysical Journal
local.identifier.citationvolume573
local.identifier.citationyear2002
local.identifier.eprintid717
local.rights.ispublishedyes
dc.date.issued2002
local.identifier.absfor020110 - Stellar Astronomy and Planetary Systems
local.identifier.ariespublicationMigratedxPub4434
local.type.statusPublished Version
local.contributor.affiliationPrieto, Carlos Allende, University of Texas
local.contributor.affiliationLambert, David, Monash University
local.contributor.affiliationAsplund, Martin, College of Physical and Mathematical Sciences, ANU
local.bibliographicCitation.startpageL137
local.bibliographicCitation.lastpageL140
local.identifier.doi10.1086/342095
dc.date.updated2015-12-11T08:57:08Z
local.identifier.scopusID2-s2.0-0042328666
CollectionsANU Research Publications

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