CHEMICAL CARTOGRAPHY WITH APOGEE: METALLICITY DISTRIBUTION FUNCTIONS AND THE CHEMICAL STRUCTURE OF THE MILKY WAY DISK
Why is this work in the frame?
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
No Canadian affiliation. An affiliation-only frame — the usual design — would never have seen this work. It is one of the works that make the case for inverting the frame.
Machine scores (provisional)
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
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- Teacher spread
- 0.185 · how far apart the two teachers sit on this one work
- Validation status
score_only:v0-immature-baseline· verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it
Abstract
Using a sample of 69,919 red giants from the SDSS-III/APOGEE Data Release 12, we measure the distribution of stars in the [/Fe] versus [Fe/H] plane and the metallicity distribution functions (MDFs) across an unprecedented volume of the Milky Way disk, with radius 3 < R < 15 kpc and height z 2 < | | kpc. Stars in the inner disk (R < 5 kpc) lie along a single track in [/Fe] versus [Fe/H], starting with -enhanced, metal-poor stars and ending at [/Fe] 0 and [Fe/H] +0.4. At larger radii we find two distinct sequences in [/Fe] versus
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The record
- Venue
- The Astrophysical Journal
- Topic
- Stellar, planetary, and galactic studies
- Field
- Physics and Astronomy
- Canadian institutions
- —
- Funders
- Lawrence Berkeley National LaboratoryMinisterio de Economía y CompetitividadYork UniversityScience and Technology Facilities CouncilCarnegie Mellon UniversityJoint Institute for Nuclear Astrophysics - Center for the Evolution of the ElementsUniversity of ArizonaOffice of ScienceAlfred P. Sloan FoundationUniversity of WashingtonPrinceton UniversityCollege of Engineering, Michigan State UniversityJohns Hopkins UniversityUniversity of MichiganHarvard UniversityOhio State UniversityNew Mexico State UniversityUniversity of PortsmouthYale UniversityVanderbilt UniversityBrookhaven National LaboratoryU.S. Department of EnergyW. M. Keck FoundationNational Science Foundation
- Keywords
- Milky WayMetallicityStarsRADIUSThick diskStar countStellar kinematicsDistribution (mathematics)
- Has abstract in OpenAlex
- yes