The Open Cluster Chemical Abundances and Mapping Survey. IV. Abundances for 128 Open Clusters Using SDSS/APOGEE DR16

Journal Article · Fri May 01 04:00:00 EDT 2020 · The Astronomical Journal (Online)

DOI:https://doi.org/10.3847/1538-3881/AB77BC· OSTI ID:23013187

Donor, John; Frinchaboy, Peter M. ^[1]; Cunha, Katia ^[2]; O’Connell, Julia E. ^[3]; Prieto, Carlos Allende ^[4]; Almeida, Andrés ^[5]; Anders, Friedrich ^[6]; Beaton, Rachael ^[7]; Bizyaev, Dmitry ^[8]; Brownstein, Joel R. ^[9]; Carrera, Ricardo ^[10]; Chiappini, Cristina ^[11]; others, and

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1. Department of Physics & Astronomy, Texas Christian University, TCU Box 298840, Fort Worth, TX 76129 (United States)
2. Steward Observatory, The University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721-0065 (United States)
3. Departamento de Astronomía, Universidad de Concepción, Casilla 160-C, Concepción (Chile)
4. Instituto de Astrofísica de Canarias, Vía Láctea S/N, E-38205 La Laguna, Tenerife (Spain)
5. Instituto de Investigación Multidisciplinario en Ciencia y Tecnología, Universidad de La Serena, Benavente 980, La Serena (Chile)
6. Departament de Física Quàntica i Astrofísica, Universitat de Barcelona, IEEC-UB, Martí i Franquès 1 E-08028 Barcelona (Spain)
7. Department of Astrophysical Sciences, Princeton University, 4 Ivy Lane, Princeton, NJ 08544 (United States)
8. Apache Point Observatory and New Mexico State University, P.O. Box 59, sunspot, NM, 88349-0059 (United States)
9. Department of Physics & Astronomy, University of Utah, 115 S. 1400 E., Salt Lake City, UT 84112 (United States)
10. Astronomical Observatory of Padova, National Institute of Astrophysics, Vicolo Osservatorio 5-35122—Padova (Italy)
11. Leibniz-Institut fur Astrophysik Potsdam (AIP), An der Sternwarte 16, D-14482 Potsdam (Germany)

The Open Cluster Chemical Abundances and Mapping (OCCAM) survey aims to constrain key Galactic dynamical and chemical evolution parameters by the construction of a large, comprehensive, uniform, infrared-based spectroscopic data set of hundreds of open clusters. This fourth contribution from the OCCAM survey presents analysis using Sloan Digital Sky Survey/APOGEE DR16 of a sample of 128 open clusters, 71 of which we designate to be “high quality” based on the appearance of their color–magnitude diagram. We find the APOGEE DR16 derived [Fe/H] abundances to be in good agreement with previous high-resolution spectroscopic open cluster abundance studies. Using the high-quality sample, we measure Galactic abundance gradients in 16 elements, and find evolution of some of the [X/Fe] gradients as a function of age. We find an overall Galactic [Fe/H] versus R {sub GC} gradient of −0.068 ± 0.001 dex kpc{sup −1} over the range of 6 < R {sub GC} < 13.9 kpc; however, we note that this result is sensitive to the distance catalog used, varying as much as 15%. We formally derive the location of a break in the [Fe/H] abundance gradient as a free parameter in the gradient fit for the first time. We also measure significant Galactic gradients in O, Mg, S, Ca, Mn, Cr, Cu, Na, Al, and K, some of which are measured for the first time. Our large sample allows us to examine four well-populated age bins in order to explore the time evolution of gradients for a large number of elements and comment on possible implications for Galactic chemical evolution and radial migration.

• OSTI ID: 23013187
• Journal Information: The Astronomical Journal (Online), Journal Name: The Astronomical Journal (Online) Journal Issue: 5 Vol. 159; ISSN 1538-3881
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
DISTANCE
ELEMENT ABUNDANCE
GALAXIES
MIGRATION
RESOLUTION