Search Results - "Hartog, Elizabeth A. Den"

Detailed Iron-peak Element Abundances in Three Very Metal-poor Stars by Cowan, John J., Sneden, Christopher, Roederer, Ian U., Lawler, James E., Hartog, Elizabeth A. Den, Sobeck, Jennifer S., Boesgaard, Ann Merchant

“…We have obtained new detailed abundances of the Fe-group elements Sc through Zn ( Z  = 21–30) in three very metal-poor ([Fe/H] ≈ −3) stars: BD+03 o 740, BD−13…”
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IRON-GROUP ABUNDANCES IN THE METAL-POOR MAIN-SEQUENCE TURNOFF STAR HD 84937 by Sneden, Christopher, Cowan, John J., Kobayashi, Chiaki, Pignatari, Marco, Lawler, James E., Den Hartog, Elizabeth A., Wood, Michael P.

“…ABSTRACT We have derived new, very accurate abundances of the Fe-group elements Sc through Zn (Z = 21−30) in the bright main-sequence turnoff star HD 84937…”
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The R-process Alliance: A Nearly Complete R-process Abundance Template Derived from Ultraviolet Spectroscopy of the R-process-enhanced Metal-poor Star HD 222925 by Roederer, Ian U., Lawler, James E., Den Hartog, Elizabeth A., Placco, Vinicius M., Surman, Rebecca, Beers, Timothy C., Ezzeddine, Rana, Frebel, Anna, Hansen, Terese T., Hattori, Kohei, Holmbeck, Erika M., Sakari, Charli M.

“…We present a nearly complete rapid neutron-capture process ( r -process) chemical inventory of the metal-poor ([Fe/H] = −1.46 ± 0.10) r -process-enhanced…”
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Iron-peak Element Abundances in Warm Very Metal-poor Stars by Sneden, Christopher, Boesgaard, Ann Merchant, Cowan, John J., Roederer, Ian U., Den Hartog, Elizabeth A., Lawler, James E.

“…We have derived new detailed abundances of Mg, Ca, and the Fe-group elements Sc through Zn ( Z = 21−30) for 37 main-sequence turnoff very metal-poor stars…”
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The R-Process Alliance: Abundance Universality among Some Elements at and between the First and Second R-Process Peaks by Roederer, Ian U., Cowan, John J., Pignatari, Marco, Beers, Timothy C., Den Hartog, Elizabeth A., Ezzeddine, Rana, Frebel, Anna, Hansen, Terese T., Holmbeck, Erika M., Mumpower, Matthew R., Placco, Vinicius M., Sakari, Charli M., Surman, Rebecca, Vassh, Nicole

“…We present new observational benchmarks of rapid neutron-capture process ( r -process) nucleosynthesis for elements at and between the first ( A ∼ 80) and…”
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Atomic data for stellar spectroscopy: recent successes and remaining needs by Sneden, Christopher, Lawler, James E, Wood, Michael P, Hartog, Elizabeth A Den, Cowan, John J

“…Stellar chemical composition analyses provide vital insights into galactic nucleosynthesis. Atomic line data are critical inputs to stellar abundance…”
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Iron-Peak Element Abundances in Warm Very Metal-Poor Stars by Sneden, Christopher, Boesgaard, Ann Merchant, Cowan, John J, Roederer, Ian U, Hartog, Elizabeth A. Den, Lawler, James E

“…We have derived new detailed abundances of Mg, Ca, and the Fe-group elements Sc through Zn (Z = 21-30) for 37 main sequence turnoff very metal-poor stars…”
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The R-Process Alliance: A Nearly Complete R-Process Abundance Template Derived from Ultraviolet Spectroscopy of the R-Process-Enhanced Metal-Poor Star HD 222925 by Roederer, Ian U, Lawler, James E, Hartog, Elizabeth A. Den, Placco, Vinicius M, Surman, Rebecca, Beers, Timothy C, Ezzeddine, Rana, Frebel, Anna, Hansen, Terese T, Hattori, Kohei, Holmbeck, Erika M, Sakari, Charli M

“…We present a nearly complete rapid neutron-capture process (r-process) chemical inventory of the metal-poor ([Fe/H] = -1.46 +/- 0.10) r-process-enhanced…”
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linemake: An Atomic and Molecular Line List Generator by Placco, Vinicius M, Sneden, Christopher, Roederer, Ian U, Lawler, James E, Hartog, Elizabeth A. Den, Hejazi, Neda, Maas, Zachary, Bernath, Peter

“…Research Notes of the AAS, 2021, 5, 92 In this research note, we present linemake, an open-source atomic and molecular line list generator. Rather than a…”
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The R-Process Alliance: Abundance Universality among Some Elements at and between the First and Second R-Process Peaks by Roederer, Ian U, Cowan, John J, Pignatari, Marco, Beers, Timothy C, Hartog, Elizabeth A. Den, Ezzeddine, Rana, Frebel, Anna, Hansen, Terese T, Holmbeck, Erika M, Mumpower, Matthew R, Placco, Vinicius M, Sakari, Charli M, Surman, Rebecca, Vassh, Nicole

“…Astrophysical Journal Vol. 936, p. 84 (2022) We present new observational benchmarks of rapid neutron-capture process (r-process) nucleosynthesis for elements…”
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Detailed Iron-Peak Element Abundances in Three Very Metal-Poor Stars by Cowan, John J, Sneden, Christopher, Roederer, Ian U, Lawler, James E, Hartog, Elizabeth A. Den, Sobeck, Jennifer S, Boesgaard, Ann Merchant

“…We have obtained new detailed abundances of the Fe-group elements Sc through Zn (Z=21-30) in three very metal-poor ([Fe/H] $\approx -3$) stars: BD 03 740, BD…”
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The R-Process Alliance: Abundance Universality among Some Elements at and between the First and Second R-Process Peaks Based on archival observations made with the NASA/ESA Hubble Space Telescope (program GO-7348, program GO-8342, program GO-9455, program GO-14161, and program GO-14672) and observations collected from the Keck Observatory Archive (program U25H) by Roederer, Ian U., Cowan, John J., Pignatari, Marco, Beers, Timothy C., Den Hartog, Elizabeth A., Ezzeddine, Rana, Frebel, Anna, Hansen, Terese T., Holmbeck, Erika M., Mumpower, Matthew R., Placco, Vinicius M., Sakari, Charli M., Surman, Rebecca, Vassh, Nicole

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The R-process Alliance: A Nearly Complete R-process Abundance Template Derived from Ultraviolet Spectroscopy of the R-process-enhanced Metal-poor Star HD 222925 Based on observations made with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc. under NASA contract NAS 5-26555. These observations are primarily associated with program GO-15657. Data from programs GO-7348, GO-819 by Roederer, Ian U., Lawler, James E., Den Hartog, Elizabeth A., Placco, Vinicius M., Surman, Rebecca, Beers, Timothy C., Ezzeddine, Rana, Frebel, Anna, Hansen, Terese T., Hattori, Kohei, Holmbeck, Erika M., Sakari, Charli M.

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Detailed Iron-peak Element Abundances in Three Very Metal-poor Stars Based on observations made with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute (STScI), which is operated by the Association of Universities for Research in Astronomy, Inc. (AURA) under NASA contract NAS 5-26555. These observations are associated with program GO-14232. Some data presented in this paper were obtained from the Barbara A. Mikulski Archive for Space Telescopes (MAST). These d by Cowan, John J., Sneden, Christopher, Roederer, Ian U., Lawler, James E., Hartog, Elizabeth A. Den, Sobeck, Jennifer S., Boesgaard, Ann Merchant

“…We have obtained new detailed abundances of the Fe-group elements Sc through Zn (Z = 21-30) in three very metal-poor ([Fe/H] −3) stars: BD+03o740, BD−13o3442,…”
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Iron-Group Abundances in the Metal-Poor Main Sequence Turnoff Star HD~84937 by Sneden, Christopher, Cowan, John J, Kobayashi, Chiaki, Pignatari, Marco, Lawler, James E, Hartog, Elizabeth A. Den, Wood, Michael P

“…We have derived new very accurate abundances of the Fe-group elements Sc through Zn (Z = 21-30) in the bright main-sequence turnoff star HD 84937, based on…”
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New Rare Earth Element Abundance Distributions for the Sun and Five r-Process-Rich Very Metal-Poor Stars by Sneden, Christopher, Lawler, James E, Cowan, John J, Ivans, Inese I, Hartog, Elizabeth A. Den

“…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…”
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