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APOGEE-2 Discovery of a Large Population of Relatively High-metallicity Globular Cluster Debris
- Source :
- The Astrophysical journal letters, The Astrophysical journal letters, Bristol : IOP Publishing, 2021, 918 (2), pp.L37. ⟨10.3847/2041-8213/ac225b⟩
- Publication Year :
- 2021
- Publisher :
- HAL CCSD, 2021.
-
Abstract
- We report the discovery of a new, chemically distinct population of relatively high-metallicity ([Fe/H] $> -0.7$) red giant stars with super-solar [N/Fe] ($\gtrsim +0.75$) identified within the bulge, disk, and halo of the Milky Way. This sample of stars was observed during the second phase of the Apache Point Observatory Galactic Evolution Experiment (APOGEE-2); the spectra of these stars are part of the seventeenth Data Release (DR 17) of the Sloan Digital Sky Survey. We hypothesize that this newly identified population was formed in a variety of progenitors, and are likely made up of either fully or partially destroyed metal-rich globular clusters, which we refer to as Globular Cluster Debris (GCD), identified by their unusual photospheric nitrogen abundances. It is likely that some of the GCD stars were probable members of the Gaia-Enceladus-Sausage accretion event, along with clusters formed in situ.<br />9 pages, 4 figures, 1 table, accepted for publication in The Astrophysical Journal Letters
- Subjects :
- Red giant
Metallicity
Milky Way
Population
FOS: Physical sciences
Astrophysics::Cosmology and Extragalactic Astrophysics
Astrophysics
01 natural sciences
Bulge
0103 physical sciences
Astrophysics::Solar and Stellar Astrophysics
education
010303 astronomy & astrophysics
Astrophysics::Galaxy Astrophysics
ComputingMilieux_MISCELLANEOUS
Physics
education.field_of_study
010308 nuclear & particles physics
Astronomy and Astrophysics
Astrophysics - Astrophysics of Galaxies
Accretion (astrophysics)
Stars
Space and Planetary Science
[SDU]Sciences of the Universe [physics]
Astrophysics of Galaxies (astro-ph.GA)
Globular cluster
Astrophysics::Earth and Planetary Astrophysics
Subjects
Details
- Language :
- English
- ISSN :
- 20418205 and 20418213
- Database :
- OpenAIRE
- Journal :
- The Astrophysical journal letters, The Astrophysical journal letters, Bristol : IOP Publishing, 2021, 918 (2), pp.L37. ⟨10.3847/2041-8213/ac225b⟩
- Accession number :
- edsair.doi.dedup.....9ccb97ad6165da2ea9836ab5719deeb7