New ATLAS9 And MARCS Model Atmosphere Grids For The Apache Point Observatory Galactic Evolution Experiment (APOGEE)

dc.contributor.utaustinauthorShetrone, Matthew D.en_US
dc.creatorMeszaros, Sz.en_US
dc.creatorPrieto, C. Allendeen_US
dc.creatorEdvardsson, B.en_US
dc.creatorCastelli, F.en_US
dc.creatorPerez, A. E. G.en_US
dc.creatorGustafsson, B.en_US
dc.creatorMajewski, S. R.en_US
dc.creatorPlez, B.en_US
dc.creatorSchiavon, R.en_US
dc.creatorShetrone, M.en_US
dc.creatorde Vicente, A.en_US
dc.description.abstractWe present a new grid of model photospheres for the SDSS-III/APOGEE survey of stellar populations of the Galaxy, calculated using the ATLAS9 and MARCS codes. New opacity distribution functions were generated to calculate ATLAS9 model photospheres. MARCS models were calculated based on opacity sampling techniques. The metallicity ([M/H]) spans from -5 to 1.5 for ATLAS and -2.5 to 0.5 for MARCS models. There are three main differences with respect to previous ATLAS9 model grids: a new corrected H2O line list, a wide range of carbon ([C/M]) and alpha element [alpha/M] variations, and solar reference abundances from Asplund et al. The added range of varying carbon and alpha-element abundances also extends the previously calculated MARCS model grids. Altogether, 1980 chemical compositions were used for the ATLAS9 grid and 175 for the MARCS grid. Over 808,000 ATLAS9 models were computed spanning temperatures from 3500 K to 30,000 K and log g from 0 to 5, where larger temperatures only have high gravities. The MARCS models span from 3500 K to 5500 K, and log g from 0 to 5. All model atmospheres are publicly available online.en_US
dc.description.departmentMcDonald Observatoryen_US
dc.description.sponsorshipAlfred P. Sloan Foundationen_US
dc.description.sponsorshipParticipating Institutionsen_US
dc.description.sponsorshipNational Science Foundationen_US
dc.description.sponsorshipU.S. Department of Energy Office of Scienceen_US
dc.identifier.citationMészáros, Sz, C. Allende Prieto, Bengt Edvardsson, F. Castelli, AE García Pérez, Bengt Gustafsson, S. R. Majewski et al. >New ATLAS9 and MARCS Model Atmosphere Grids for the Apache Point Observatory Galactic Evolution Experiment (APOGEE).> The Astronomical Journal, Vol. 144, No. 4 (Oct., 2012): 120.en_US
dc.relation.ispartofserialAstronomical Journalen_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.subjectradiative transferen_US
dc.subjectstars: atmospheresen_US
dc.subjectsolar chemical-compositionen_US
dc.subjectdigital sky surveyen_US
dc.subjectline listen_US
dc.subjectastronomy & astrophysicsen_US
dc.titleNew ATLAS9 And MARCS Model Atmosphere Grids For The Apache Point Observatory Galactic Evolution Experiment (APOGEE)en_US

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