A Laboratory Log(Gf) Measurement of the TIII 15873.84 Angstrom H-Band Line in Support of SDSS-III APOGEE

dc.contributor.utaustinauthorShetrone, Matthew D.en_US
dc.creatorWood, M. P.en_US
dc.creatorLawler, James E.en_US
dc.creatorShetrone, Matthew D.en_US
dc.date.accessioned2016-10-28T19:34:38Z
dc.date.available2016-10-28T19:34:38Z
dc.date.issued2014-06en_US
dc.description.abstractThe SDSS-III APOGEE collaboration has identified a single useable line in the H-band spectra of APOGEE target stars arising from a singly ionized species. This line of TiII (lambda(air) 15873.84 angstrom) is therefore of great importance for use in stellar surface gravity, or log(g), determinations via the Saha equation. While a theoretical estimate of the line strength exists, to date no laboratory measurement of the line strength has been reported. Herein we report an absolute laboratory transition probability measurement for this important TiII line. A relative line strength measurement is made of the TiII H-band line of interest and a reference line with a previously reported absolute transition probability. This ratio is measured using multiple spectra of a high-current water-cooled HC lamp recorded with a calibrated FT-IR spectrometer.en_US
dc.description.departmentMcDonald Observatoryen_US
dc.description.sponsorshipNSF AST-1211055en_US
dc.identifierdoi:10.15781/T2901ZJ5D
dc.identifier.citationWood, Michael P., James E. Lawler, and Matthew D. Shetrone. "A Laboratory log (gf) Measurement of the Ti II 15873.84 Å H-Band Line in Support of SDSS-III Apogee." The Astrophysical Journal Letters, Vol. 787, No. 2 (Jun., 2014): L16.en_US
dc.identifier.doi10.1088/2041-8205/787/2/l16en_US
dc.identifier.issn2041-8205en_US
dc.identifier.urihttp://hdl.handle.net/2152/42934
dc.language.isoEnglishen_US
dc.relation.ispartofen_US
dc.relation.ispartofserialAstrophysical Journal Lettersen_US
dc.rightsAdministrative deposit of works to Texas ScholarWorks: This works author(s) is or was a University faculty member, student or staff member; this article is already available through open access or the publisher allows a PDF version of the article to be freely posted online. The library makes the deposit as a matter of fair use (for scholarly, educational, and research purposes), and to preserve the work and further secure public access to the works of the University.en_US
dc.rights.restrictionOpenen_US
dc.subjectatomic dataen_US
dc.subjectmethods: laboratory: atomicen_US
dc.subjectabundanceen_US
dc.subjectastronomy & astrophysicsen_US
dc.titleA Laboratory Log(Gf) Measurement of the TIII 15873.84 Angstrom H-Band Line in Support of SDSS-III APOGEEen_US
dc.typeArticleen_US

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