Departures from LTE for neutral Li in late-type stars
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Lind, K; Asplund, Martin; Barklem, Paul S
Description
We perform non-LTE calculations of lithium in late-type stars for a wide range of stellar parameters, including quantum mechanical cross-sections for collisions with neutral hydrogen and the negative hydrogen ion. Non-LTE abundance corrections for the lithium resonance line at 670.7 nm and the subordinate line at 610.3 nm, are calculated using 1D MARCS model atmospheres spanning a grid Teff = [4000, 8000] K, log g = [1.0,5.0], and [Fe/H] = [0.0, -3.0], for lithium abundances in the range A (Li)...[Show more]
dc.contributor.author | Lind, K | |
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dc.contributor.author | Asplund, Martin | |
dc.contributor.author | Barklem, Paul S | |
dc.date.accessioned | 2015-12-13T22:48:55Z | |
dc.identifier.issn | 0004-6361 | |
dc.identifier.uri | http://hdl.handle.net/1885/80295 | |
dc.description.abstract | We perform non-LTE calculations of lithium in late-type stars for a wide range of stellar parameters, including quantum mechanical cross-sections for collisions with neutral hydrogen and the negative hydrogen ion. Non-LTE abundance corrections for the lithium resonance line at 670.7 nm and the subordinate line at 610.3 nm, are calculated using 1D MARCS model atmospheres spanning a grid Teff = [4000, 8000] K, log g = [1.0,5.0], and [Fe/H] = [0.0, -3.0], for lithium abundances in the range A (Li) = [-0.3,4.2]. The competing effects of ultraviolet over-ionization and photon losses in the resonance line govern the behaviour of the non-LTE effects with stellar parameters and lithium abundance. The size and sign of the non-LTE abundance corrections vary significantly over the grid for the 670.7 nm line, but are typically positive and below 0.15 dex for the 610.3 nm, line. The new collisional data play a significant role in determining the abundance corrections. | |
dc.publisher | Springer | |
dc.source | Astronomy and Astrophysics | |
dc.subject | Keywords: Abundances - stars; Competing effects; Formation; Hydrogen ions; Late-type; Late-type stars; Lithium resonance lines; Model atmosphere; Neutral hydrogen; Non-LTE; Photon loss; Quantum mechanical; Resonance line; Stellar parameters; Hydrogen; Photoionizati Abundances-stars; Formation; Late-type-line; Stars | |
dc.title | Departures from LTE for neutral Li in late-type stars | |
dc.type | Journal article | |
local.description.notes | Imported from ARIES | |
local.identifier.citationvolume | 503 | |
dc.date.issued | 2009 | |
local.identifier.absfor | 020110 - Stellar Astronomy and Planetary Systems | |
local.identifier.ariespublication | f5625xPUB8573 | |
local.type.status | Published Version | |
local.contributor.affiliation | Lind, K, European Southern Observatory | |
local.contributor.affiliation | Asplund, Martin, College of Physical and Mathematical Sciences, ANU | |
local.contributor.affiliation | Barklem, Paul S, Uppsala Astronomical Observatory | |
local.description.embargo | 2037-12-31 | |
local.bibliographicCitation.issue | 2 | |
local.bibliographicCitation.startpage | 541 | |
local.bibliographicCitation.lastpage | 544 | |
local.identifier.doi | 10.1051/0004-6361/200912221 | |
dc.date.updated | 2016-02-24T09:43:00Z | |
local.identifier.scopusID | 2-s2.0-71849090669 | |
Collections | ANU Research Publications |
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