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Exploring the S-pro...
Exploring the S-process History in the Galactic Disk : Cerium Abundances and Gradients in Open Clusters from the OCCAM/APOGEE Sample
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- Sales-Silva, J. V. (author)
- Observatório Nacional/MCTIC, R. Gen. José Cristino, 77, 20921-400, Rio de Janeiro, Brazil
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- Daflon, S. (author)
- Observatório Nacional/MCTIC, R. Gen. José Cristino, 77, 20921-400, Rio de Janeiro, Brazil
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- Cunha, K. (author)
- Observatório Nacional/MCTIC, R. Gen. José Cristino, 77, 20921-400, Rio de Janeiro, Brazil; Steward Observatory, University of Arizona, Tucson, AZ 85719, USA
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- Souto, D. (author)
- Departamento de Física, Universidade Federal de Sergipe, Av. Marechal Rondon, S/N, 49000-000 São Cristóvão, SE, Brazil
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- Smith, V. V. (author)
- Noirlab, Tucson, AZ 85719, USA
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- Chiappini, C. (author)
- Leibniz-Institut für Astrophysik Potsdam (AIP), An der Sternwarte 16, D-14482 Potsdam, Germany
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- Donor, J. (author)
- Department of Physics & Astronomy, Texas Christian University, TCU Box 298840, Fort Worth, TX 76129, USA
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- Frinchaboy, P. M. (author)
- Department of Physics & Astronomy, Texas Christian University, TCU Box 298840, Fort Worth, TX 76129, USA
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- Garcia-Hernandez, D. A. (author)
- Instituto de Astrofísica de Canarias (IAC), E-38205 La Laguna, Tenerife, Spain; Universidad de La Laguna (ULL), Departamento de Astrofísica, E-38206 La Laguna, Tenerife, Spain
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- Hayes, C. (author)
- Department of Astronomy, University of Washington, Box 351580, Seattle, WA 98195, USA
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- Majewski, S. R. (author)
- Department of Astronomy, University of Virginia, Charlottesville, VA 22904-4325, USA
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- Masseron, T. (author)
- Instituto de Astrofísica de Canarias (IAC), E-38205 La Laguna, Tenerife, Spain; Universidad de La Laguna (ULL), Departamento de Astrofísica, E-38206 La Laguna, Tenerife, Spain
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- Schiavon, R. P. (author)
- Astrophysics Research Institute, Liverpool John Moores University, Liverpool, L3 5RF, UK
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- Weinberg, D. H. (author)
- Department of Astronomy & Center for Cosmology and AstroParticle Physics, The Ohio State University, Columbus, OH 43210, USA; Institute for Advanced Study, Princeton, NJ 08540, USA
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- Beaton, R. L. (author)
- The Carnegie Observatories, 813 Santa Barbara Street, Pasadena, CA 91101, USA
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- Fernandez-Trincado, J. G. (author)
- Instituto de Astronomía, Universidad Católica del Norte, Av. Angamos 0610, Antofagasta, Chile; Instituto de Astronomía y Ciencias Planetarias, Universidad de Atacama, Copayapu 485, Copiapó, Chile
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- Jönsson, Henrik (author)
- Malmö universitet,Institutionen för materialvetenskap och tillämpad matematik (MTM)
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- Lane, R. R. (author)
- Centro de Investigación en Astronomía, Universidad Bernardo O'Higgins, Avenida Viel 1497, Santiago, Chile
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- Minniti, D. (author)
- Departamento de Ciencias Fisicas, Facultad de Ciencias Exactas, Universidad Andres Bello, Av. Fernandez Concha 700, Las Condes, Santiago, Chile; Vatican Observatory, I-00120 Vatican City State, Italy
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- Manchado, A. (author)
- Instituto de Astrofísica de Canarias (IAC), E-38205 La Laguna, Tenerife, Spain; Universidad de La Laguna (ULL), Departamento de Astrofísica, E-38206 La Laguna, Tenerife, Spain; Instituto de Astrofísica de Canarias, C. Vía Láctea, s/n, 38205 San Cristóbal de La Laguna, Santa Cruz de Tenerife, Spain
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- Moni Bidin, C. (author)
- Instituto de Astronomía, Universidad Católica del Norte, Av. Angamos 0610, Antofagasta, Chile
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- Nitschelm, C. (author)
- Centro de Astronomía (CITEVA), Universidad de Antofagasta, Avenida Angamos 601, Antofagasta 1270300, Chile
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- O'Connell, J. (author)
- Departamento de Astronomía, Casilla 160-C, Universidad de Concepción, Concepción, Chile
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- Villanova, S. (author)
- Departamento de Astronomía, Casilla 160-C, Universidad de Concepción, Concepción, Chile
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Observatório Nacional/MCTIC, R Gen. José Cristino, 77, 20921-400, Rio de Janeiro, Brazil Observatório Nacional/MCTIC, R. Gen. José Cristino, 77, 20921-400, Rio de Janeiro, Brazil; Steward Observatory, University of Arizona, Tucson, AZ 85719, USA (creator_code:org_t)
- 2022-02-21
- 2022
- English.
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In: Astrophysical Journal. - : Institute of Physics (IOP). - 0004-637X .- 1538-4357. ; 926:2
- Related links:
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https://doi.org/10.3...
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https://mau.diva-por... (primary) (Raw object)
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https://iopscience.i...
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https://urn.kb.se/re...
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https://doi.org/10.3...
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Abstract
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- The APOGEE Open Cluster Chemical Abundances and Mapping survey is used to probe the chemical evolution of the s-process element cerium in the Galactic disk. Cerium abundances were derived from measurements of Ce ii lines in the APOGEE spectra using the Brussels Automatic Code for Characterizing High Accuracy Spectra in 218 stars belonging to 42 open clusters. Our results indicate that, in general, for ages < 4 Gyr, younger open clusters have higher [Ce/Fe] and [Ce/α-element] ratios than older clusters. In addition, metallicity segregates open clusters in the [Ce/X]–age plane (where X can be H, Fe, or the α-elements O, Mg, Si, or Ca). These metallicity-dependent relations result in [Ce/Fe] and [Ce/α] ratios with ages that are not universal clocks. Radial gradients of [Ce/H] and [Ce/Fe] ratios in open clusters, binned by age, were derived for the first time, with d[Ce/H]/dRGC being negative, while d[Ce/Fe]/dRGC is positive. [Ce/H] and [Ce/Fe] gradients are approximately constant over time, with the [Ce/Fe] gradient becoming slightly steeper, changing by ∼+0.009 dex kpc−1 Gyr−1. Both the [Ce/H] and [Ce/Fe] gradients are shifted to lower values of [Ce/H] and [Ce/Fe] for older open clusters. The chemical pattern of Ce in open clusters across the Galactic disk is discussed within the context of s-process yields from asymptotic giant branch (AGB) stars, gigayear time delays in Ce enrichment of the interstellar medium, and the strong dependence of Ce nucleosynthesis on the metallicity of its AGB stellar sources.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
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Sales-Silva, J. ...
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Daflon, S.
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Cunha, K.
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Souto, D.
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Smith, V. V.
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Chiappini, C.
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show more...
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Donor, J.
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Frinchaboy, P. M ...
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Garcia-Hernandez ...
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Hayes, C.
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Majewski, S. R.
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Masseron, T.
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Schiavon, R. P.
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Weinberg, D. H.
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Beaton, R. L.
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Fernandez-Trinca ...
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Jönsson, Henrik
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Lane, R. R.
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Minniti, D.
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Manchado, A.
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Moni Bidin, C.
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Nitschelm, C.
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O'Connell, J.
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Villanova, S.
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Malmö University