J. J. Cowan - Publications, H-index & Citations

J. J. Cowan

physics and astronomy

58H指数

354论文数

1.3W被引数

收录论文 78

发表时间

The r-process: history, required conditions, astrophysical sites, and observations r-过程：历史、所需条件、天文观测站和观测结果

The European Physical Journal A

IF0

2026-05-27

OAAI

Friedrich-K. Thielemann; John J. Cowan

Iron-peak Element Abundances in Warm Very Metal-poor Stars

ASTROPHYSICAL JOURNAL

IF5.4

2023-07-31

OAAI

Sneden, Christopher; Boesgaard, Ann Merchant; Cowan, John J.; Roederer, Ian U.; Den Hartog, Elizabeth A.; Lawler, James E.

Atomic Transition Probabilities for Transitions of Si i and Si ii and the Silicon Abundances of Several Very Metal-poor Stars *

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES

IF8.5

2023-03-20

OAAI

Den Hartog, E. A.; Lawler, J. E.; Sneden, C.; Roederer, I. U.; Cowan, J. J.

The R-Process Alliance: Abundance Universality among Some Elements at and between the First and Second R-Process Peaks*

ASTROPHYSICAL JOURNAL

IF5.4

2022-09-01

OAAI

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

Atomic Transition Probabilities of Neutral Calcium*

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES

IF8.5

2021-08-10

OAAI

Den Hartog, E. A.; Lawler, J. E.; Sneden, C.; Cowan, J. J.; Roederer, I. U.; Sobeck, J.

Vanadium Abundance Derivations in 255 Metal-poor Stars*

ASTROPHYSICAL JOURNAL

IF5.4

2020-09-07

OAAI

Ou, Xiaowei; Roederer, Ian U.; Sneden, Christopher; Cowan, John J.; Lawler, James E.; Shectman, Stephen A.; Thompson, Ian B.

Atomic Transition Probabilities for UV and Blue Lines of Fe II and Abundance Determinations in the Photospheres of the Sun and Metal-poor Star HD 84937 Fe II的UV和蓝线的原子跃迁概率以及太阳和贫金属恒星HD 84937的光球中的丰度测定

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES

IF8.5

2019-08-15

OAAI

Den Hartog, E. A.; Lawler, J. E.; Sneden, C.; Cowan, J. J.; Brukhovesky, A.

Transition Probabilities of Sc I and Sc II and Scandium Abundances in the Sun, Arcturus, and HD 84937

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES

IF8.5

2019-03-27

OAAI

Lawler, J. E.; Hala; Sneden, C.; Nave, G.; Wood, M. P.; Cowan, J. J.

The R-Process Alliance: First Release from the Northern Search for r-process-enhanced Metal-poor Stars in the Galactic Halo

ASTROPHYSICAL JOURNAL

IF5.4

2018-11-29

103

OAAI

Sakari, Charli M.; Placco, Vinicius M.; Farrell, Elizabeth M.; Roederer, Ian U.; Wallerstein, George; Beers, Timothy C.; Ezzeddine, Rana; Frebel, Anna; Hansen, Terese; Holmbeck, Erika M.; Sneden, Christopher; Cowan, John J.; Venn, Kim A.; Davis, Christopher Evan; Matijevic, Gal; Wyse, Rosemary F. G.; Bland-Hawthorn, Joss; Chiappini, Cristina; Freeman, Kenneth C.; Gibson, Brad K.; Grebel, Eva K.; Helmi, Amina; Kordopatis, Georges; Kunder, Andrea; Navarro, Julio; Reid, Warren; Seabroke, George; Steinmetz, Matthias; Watson, Fred

Consistent Iron Abundances Derived from Neutral and Singly Ionized Iron Lines in Ultraviolet and Optical Spectra of Six Warm Metal-poor Stars

ASTROPHYSICAL JOURNAL

IF5.4

2018-06-20

OAAI

Roederer, Ian U.; Sneden, Christopher; Lawler, James E.; Sobeck, Jennifer S.; Cowan, John J.; Boesgaard, Ann Merchant

Vanadium Transitions in the Spectrum of Arcuturs

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES

IF8.5

2018-02-01

OAAI

Wood, M. P.; Sneden, C.; Lawler, J. E.; Den Hartog, E. A.; Cowan, J. J.; Nave, G.

IMPROVED Cr II log(gf) VALUES AND ABUNDANCE DETERMINATIONS IN THE PHOTOSPHERES OF THE SUN AND METAL-POOR STAR HD 84937 太阳和金属贫乏的恒星HD 84937的光球中的Cr II log(gf) 值和丰度测定得到改善

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES

IF8.5

2017-01-20

OAAI

Lawler, J. E.; Sneden, C.; Nave, G.; Den Hartog, E. A.; Emrahoglu, N.; Cowan, J. J.

Teachers and students as co-learners

BRITISH JOURNAL OF EDUCATIONAL TECHNOLOGY

IF8.1

2016-01-08

PREAI

Cowan, John

Becoming a high expectation teacher

BRITISH JOURNAL OF EDUCATIONAL TECHNOLOGY

IF8.1

2016-01-08

PREAI

Cowan, John

Nine new metal-poor stars on the subgiant and red horizontal branches with high levels of r-process enhancement (vol 445, pg 2946, 2014)

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY

IF4.8

2015-12-03

OAAI

Roederer, Ian U.; Cowan, John J.; Preston, George W.; Shectman, Stephen A.; Sneden, Christopher; Thompson, Ian B.

HUBBLE SPACE TELESCOPE NEAR-ULTRAVIOLET SPECTROSCOPY OF BRIGHT CEMP-s STARS

ASTROPHYSICAL JOURNAL

IF5.4

2015-10-14

OAAI

Placco, Vinicius M.; Beers, Timothy C.; Ivans, Inese I.; Filler, Dan; Imig, Julie A.; Roederer, Ian U.; Abate, Carlo; Hansen, Terese; Cowan, John J.; Frebel, Anna; Lawler, James E.; Schatz, Hendrik; Sneden, Christopher; Sobeck, Jennifer S.; Aoki, Wako; Smith, Verne V.; Bolte, Michael

IMPROVED Co I log(gf) VALUES AND ABUNDANCE DETERMINATIONS IN THE PHOTOSPHERES OF THE SUN AND METAL-POOR STAR HD 84937 太阳和贫金属恒星HD 84937的光球中Co I log(gf) 值和丰度测定的改进

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES

IF8.5

2015-09-11

OAAI

Lawler, J. E.; Sneden, C.; Cowan, J. J.

Understanding research in education

BRITISH JOURNAL OF EDUCATIONAL TECHNOLOGY

IF8.1

2015-06-05

PREAI

Cowan, John