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  • Hinkel, Natalie R.Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ 85287 USA.,Arizona State University (author)

A Comparison Of Stellar Elemental Abundance Techniques And Measurements

  • Article/chapterEnglish2016

Publisher, publication year, extent ...

  • 2016-08-31
  • American Astronomical Society,2016
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:uu-305485
  • https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-305485URI
  • https://doi.org/10.3847/0067-0049/226/1/4DOI
  • https://lup.lub.lu.se/record/9a679a3e-231f-4304-aafd-65b7b70d3eeaURI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • Stellar elemental abundances are important for understanding the fundamental properties of a star or stellar group, such as age and evolutionary history, as well as the composition of an orbiting planet. However, as abundance measurement techniques have progressed, there has been little standardization between individual methods and their comparisons. As a result, different stellar abundance procedures determine measurements that vary beyond the quoted error for the same elements within the same stars. The purpose of this paper is to better understand the systematic variations between methods and offer recommendations for producing more accurate results in the future. We invited a number of participants from around the world (Australia, Portugal, Sweden, Switzerland, and the United States) to calculate 10 element abundances (C, O, Na, Mg, Al, Si, Fe, Ni, Ba, and Eu) using the same stellar spectra for four stars (HD 361, HD 10700, HD 121504, and HD 202206). Each group produced measurements for each star using (1) their own autonomous techniques, (2) standardized stellar parameters, (3) a standardized line list, and (4) both standardized parameters and a line list. We present the resulting stellar parameters, absolute abundances, and a metric of data similarity that quantifies the homogeneity of the data. We conclude that standardization of some kind, particularly stellar parameters, improves the consistency between methods. However, because results did not converge as more free parameters were standardized, it is clear there are inherent issues within the techniques that need to be reconciled. Therefore, we encourage more conversation and transparency within the community such that stellar abundance determinations can be reproducible as well as accurate and precise.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Young, Patrick A.Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ 85287 USA.,Arizona State University (author)
  • Pagano, Michael D.Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ 85287 USA.,Arizona State University (author)
  • Desch, Steven J.Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ 85287 USA.,Arizona State University (author)
  • Anbar, Ariel D.Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ 85287 USA.,Arizona State University (author)
  • Adibekyan, VardanUniv Porto, Inst Astrofis & Ciencias Espaco, CAUP, Rua Estrelas, P-4150762 Oporto, Portugal.,University of Porto (author)
  • Blanco-Cuaresma, SergiUniv Geneva, Observ Geneve, CH-1290 Versoix, Switzerland.,University of Geneva (author)
  • Carlberg, Joleen K.NASA, Goddard Space Flight Ctr, Code 667, Greenbelt, MD 20771 USA.;Carnegie Inst Sci, Dept Terr Magnetism, 5241 Broad Branch Rd NW, Washington, DC 20015 USA.,NASA Goddard Space Flight Center,Carnegie Institution for Science (author)
  • Mena, Elisa DelgadoUniv Porto, Inst Astrofis & Ciencias Espaco, CAUP, Rua Estrelas, P-4150762 Oporto, Portugal.,University of Porto (author)
  • Liu, FanAustralian Natl Univ, Res Sch Astron & Astrophys, Cotter Rd, Weston, ACT 2611, Australia.,Australian National University(Swepub:lu)fa0858li (author)
  • Nordlander, ThomasUppsala University,Uppsala universitet,Teoretisk astrofysik(Swepub:uu)thono452 (author)
  • Sousa, Sergio G.Univ Porto, Inst Astrofis & Ciencias Espaco, CAUP, Rua Estrelas, P-4150762 Oporto, Portugal.,University of Porto (author)
  • Korn, AndreasUppsala University,Uppsala universitet,Teoretisk astrofysik(Swepub:uu)ankor103 (author)
  • Gruyters, PieterUppsala University,Lund University,Lunds universitet,Uppsala universitet,Teoretisk astrofysik,Lund Observ, Dept Astron & Theoret Phys, Box 43, S-22100 Lund, Sweden.,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science(Swepub:lu)astr-prg (author)
  • Heiter, UlrikeUppsala University,Uppsala universitet,Observationell astrofysik(Swepub:uu)ulhei450 (author)
  • Jofre, PaulaUniv Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England.,University of Cambridge (author)
  • Santos, Nuno C.Univ Porto, Inst Astrofis & Ciencias Espaco, CAUP, Rua Estrelas, P-4150762 Oporto, Portugal.;Univ Porto, Fac Ciencias, Dept Fis & Astron, Rua Campo Alegre, P-4169007 Oporto, Portugal.,University of Porto (author)
  • Soubiran, CarolineUniv Bordeaux, CNRS, LAB, UMR 5804, F-33270 Floirac, France.,University of Bordeaux (author)
  • Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ 85287 USA.Arizona State University (creator_code:org_t)

Related titles

  • In:Astrophysical Journal Supplement Series: American Astronomical Society226:10067-00491538-4365

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