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| Verfasst von: | Holmbeck, Erika M. [VerfasserIn]  |
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| | Hansen, Terese T. [VerfasserIn] |
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| | Beers, Timothy C. [VerfasserIn] |
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| | Placco, Vinicius M. [VerfasserIn] |
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| | Whitten, Devin D. [VerfasserIn] |
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| | Rasmussen, Kaitlin C. [VerfasserIn] |
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| | Roederer, Ian U. [VerfasserIn] |
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| | Ezzeddine, Rana [VerfasserIn] |
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| | Sakari, Charli M. [VerfasserIn] |
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| | Frebel, Anna [VerfasserIn] |
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| | Drout, Maria R. [VerfasserIn] |
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| | Simon, Joshua D. [VerfasserIn] |
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| | Thompson, Ian B. [VerfasserIn] |
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| | Bland-Hawthorn, Joss [VerfasserIn] |
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| | Gibson, Brad K. [VerfasserIn] |
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| | Grebel, Eva K. [VerfasserIn] |
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| | Kordopatis, Georges [VerfasserIn] |
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| | Kunder, Andrea [VerfasserIn] |
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| | Meléndez, Jorge [VerfasserIn] |
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| | Navarro, Julio F. [VerfasserIn] |
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| | Reid, Warren A. [VerfasserIn] |
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| | Seabroke, George [VerfasserIn] |
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| | Steinmetz, Matthias [VerfasserIn] |
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| | Watson, Fred [VerfasserIn] |
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| | Wyse, Rosemary F. G. [VerfasserIn] |
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| Titel: | The R-Process Alliance |
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| Titelzusatz: | fourth data release from the search for R-process-enhanced stars in the galactic halo |
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| Verf.angabe: | Erika M. Holmbeck, Terese T. Hansen, Timothy C. Beers, Vinicius M. Placco, Devin D. Whitten, Kaitlin C. Rasmussen, Ian U. Roederer, Rana Ezzeddine, Charli M. Sakari, Anna Frebel, Maria R. Drout, Joshua D. Simon, Ian B. Thompson, Joss Bland-Hawthorn, Brad K. Gibson, Eva K. Grebel, Georges Kordopatis, Andrea Kunder, Jorge Meléndez, Julio F. Navarro, Warren A. Reid, George Seabroke, Matthias Steinmetz, Fred Watson, and Rosemary F.G. Wyse |
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| E-Jahr: | 2020 |
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| Jahr: | 2020 August 7 |
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| Fussnoten: | Gesehen am 23.09.2020 |
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| Titel Quelle: | Enthalten in: The astrophysical journal / Supplement series |
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| Ort Quelle: | London : Institute of Physics Publ., 1996 |
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| Jahr Quelle: | 2020 |
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| Band/Heft Quelle: | 249(2020,2) Artikel-Nummer 30, 13 Seiten |
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| ISSN Quelle: | 1538-4365 |
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| Abstract: | This compilation is the fourth data release from the R-Process Alliance (RPA) search for r-process-enhanced stars and the second release based on “snapshot” high-resolution (R ∼ 30,000) spectra collected with the du Pont 2.5 m Telescope. In this data release, we propose a new delineation between the r-I and r-II stellar classes at , instead of the empirically chosen level previously in use, based on statistical tests of the complete set of RPA data released to date. We also statistically justify the minimum level of [Eu/Fe] for definition of the r-I stars, [Eu/Fe] > +0.3. Redefining the separation between r-I and r-II stars will aid in the analysis of the possible progenitors of these two classes of stars and determine whether these signatures arise from separate astrophysical sources at all. Applying this redefinition to previous RPA data, the number of identified r-II and r-I stars changes to 51 and 121, respectively, from the initial set of data releases published thus far. In this data release, we identify 21 new r-II, 111 new r-I (plus 3 re-identified), and 7 new (plus 1 re-identified) limited-r stars out of a total of 232 target stars, resulting in a total sample of 72 new r-II stars, 232 new r-I stars, and 42 new limited-r stars identified by the RPA to date. |
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| DOI: | doi:10.3847/1538-4365/ab9c19 |
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| URL: | Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.
Volltext: https://doi.org/10.3847/1538-4365/ab9c19 |
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| | DOI: https://doi.org/10.3847/1538-4365/ab9c19 |
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| Datenträger: | Online-Ressource |
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| Sprache: | eng |
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| K10plus-PPN: | 1733644156 |
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| Verknüpfungen: | → Zeitschrift |
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¬The¬ R-Process Alliance / Holmbeck, Erika M. [VerfasserIn]; 2020 August 7 (Online-Ressource)
