NEW RARE EARTH ELEMENT ABUNDANCE DISTRIBUTIONS FOR THE SUN AND FIVE r-PROCESS-RICH VERY METAL-POOR STARS

By C. Sneden, J. E. Lawler, J. Cowan, I. Ivans, E. A. Den Hartog. 2009

168 citations recorded by the source corpus.

We have derived new abundances of the rare earth elements Pr, Dy, Tm, Yb, and Lu for the solar photosphere and for five very metal-poor, neutron-capture r-process-rich giant stars. The photospheric values for all five elements are in good agreement with meteoritic abundances. For the low-metallicity sample, these abundances have been combined with new Ce abundances from a companion paper, and reconsideration of a few other elements in individual stars, to produce internally consistent Ba, rare earth, and Hf (56 ⩽ Z ⩽ 72) element distributions. These have been used in a critical comparison between stellar and solar r-process abundance mixes.

Subfields: Astronomy and Astrophysics, Instrumentation

View Paper: https://www.semanticscholar.org/paper/16aa89fd63b23384f4e0bd7065794bb4882ecadb

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In Astronomy and Astrophysics

1. C. Sneden
2. Martin Asplund
3. J. Cowan
4. N. Grevesse
5. Pat Scott
6. A. Sauval
7. I. Ivans
8. J. E. Lawler

In Instrumentation

1. C. Sneden
2. J. Cowan
3. M. Walker
4. I. Thompson
5. I. Ivans
6. J. E. Lawler
7. S. Shectman
8. Martin Asplund

Citations in the corpus

• Comprehensive nucleosynthesis analysis for ejecta of compact binary mergers (2014, background): “MNRAS 448, 541–567 (2015) at M PI A strophysics on M ay 8, 2015 http://m nras.oxfordjournals.org/ D ow nloaded from (Sneden et al. 2003, 2009; Sneden, Cowan & Gallino 2008) led to the conclusion that any astrophysical event producing r-elements gives rise to a Solar system r-abundance distribution,…”
• DETAILED CHEMICAL ABUNDANCES IN THE r-PROCESS-RICH ULTRA-FAINT DWARF GALAXY RETICULUM 2 (2016, methodology): “…HFS from Ivans et al. 2006; (21) Lawler et al. 2009; (22) Li et al. 2007, using HFS from Sneden et al. 2009; (23) Ivarsson et al. 2001, using HFS from Sneden et al. 2009; (24) Den Hartog et al. 2003, using HFS/IS from Roederer et al. 2008a when available; (25) Lawler et al. 2006, using HFS/IS from…”
• A SEARCH FOR STARS OF VERY LOW METAL ABUNDANCE. VI. DETAILED ABUNDANCES OF 313 METAL-POOR STARS (2014, result): “…that the [X/Fe] ratios, where X represents one of the neutron-capture elements detected in its ionized state, are lower in CS 22892–052 when compared with previous results (Sneden et al. 1994, 1996, 2003, 2009; McWilliam et al. 1995b; Honda et al. 2004b; Barklem et al. 2005; François et al. 2007).”
• The chemical composition of the Sun (2009, background): “…isotopic shifts and hyperfine constants for all the rare Earth elements: La (Lawler, Bonvallet & Sneden 2001), Ce (Lawler et al. 2009), Pr (Sneden et al. 2009), Nd (Den Hartog et al. 2003), Sm (Lawler et al. 2006), Eu (Lawler et al. 2001b), Gd (Den Hartog et al. 2006), Tb (Lawler et al.…”
• THE ABUNDANCES OF NEUTRON-CAPTURE SPECIES IN THE VERY METAL-POOR GLOBULAR CLUSTER M15: A UNIFORM ANALYSIS OF RED GIANT BRANCH AND RED HORIZONTAL BRANCH STARS (2011, unknown): “A single consistent methodology for the analysis is employed and an expansive set of recently-determined oscillator strengths is utilized (e.g. Lawler et al. 2009(62), Sneden et al. 2009(87), and references therein).”
• IMPROVED LABORATORY TRANSITION PROBABILITIES FOR Ce ii, APPLICATION TO THE CERIUM ABUNDANCES OF THE SUN AND FIVE r-PROCESS-RICH, METAL-POOR STARS, AND RARE EARTH LAB DATA SUMMARY (2009, methodology): “Studies of possible small s-process contributions to other s-process dominant RE elements, such as Ba, in these five stars studied here is included in Sneden et al. (2009).”
• The elemental composition of the Sun - III. The heavy elements Cu to Th (2014, methodology): “We included all HFS and isotopic splittings summarised by Sneden et al. (2009) in our calculations.”