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Results 1 - 28 of 28

Metal Mixing in the R-Process Enhanced Ultra-Faint Dwarf Galaxy Reticulum II. (arXiv:2207.03499v2 [astro-ph.GA] UPDATED)
- Virtual Journal - Volume 21, Issue 8 - article #4
- Alexander P. Ji, Joshua D. Simon, Ian U. Roederer, Ekaterina Magg, Anna Frebel, Christian I. Johnson, Ralf S. Klessen, Mattis Magg, Gabriele Cescutti, Mario Mateo, Maria Bergemann, John I. Bailey III
- http://arxiv.org/abs/2207.03499
Metal Mixing in the r-process Enhanced Ultrafaint Dwarf Galaxy Reticulum II
- Virtual Journal - Volume 21, Issue 7 - article #11
- Alexander P. Ji, Joshua D. Simon, Ian U. Roederer, Ekaterina Magg, Anna Frebel, Christian I. Johnson, Ralf S. Klessen, Mattis Magg, Gabriele Cescutti, Mario Mateo
- Astronomical Journal
- https://doi.org/10.3847/1538-3881/acad84
Light Element Discontinuities Suggest an Early Termination of Star Formation in the Globular Cluster NGC 6402 (M14). (arXiv:1903.01951v1 [astro-ph.SR])
- Virtual Journal - Volume 17, Issue 10 - article #3
- Christian I. Johnson, Nelson Caldwell, R. Michael Rich, Mario Mateo, John I. Bailey III
- http://arxiv.org/abs/1903.01951
Light and Heavy Element Abundance Variations in the Outer Halo Globular Cluster NGC 6229
- Virtual Journal - Volume 15, Issue 38 - article #15
- Christian I. Johnson, Nelson Caldwell, R. Michael Rich,, Matthew G. Walker
- The Astronomical Journal
- http://iopscience.iop.org/1538-3881/154/4/155
Chemical Complexity in the Eu-enhanced Monometallic Globular Cluster NGC 5986. (arXiv:1705.10840v1 [astro-ph.SR])
- Virtual Journal - Volume 15, Issue 22 - article #1
- Christian I. Johnson, Nelson Caldwell, R. Michael Rich, Mario Mateo, John I. Bailey III, Edward W. Olszewski, Matthew G. Walker
- http://arxiv.org/abs/1705.10840
A Chemical Composition Survey of the Iron-Complex Globular Cluster NGC 6273 (M 19). (arXiv:1611.05830v1 [astro-ph.SR])
- Virtual Journal - Volume 14, Issue 47 - article #1
- Christian I. Johnson, Nelson Caldwell, R. Michael Rich, Mario Mateo, John I. Bailey, William I. Clarkson, Edward W. Olszewski, Matthew G. Walker
- http://arxiv.org/abs/1611.05830
The Chemical Composition of Red Giant Branch Stars in the Galactic Globular Clusters NGC 6342 and NGC 6366. (arXiv:1606.08491v1 [astro-ph.SR])
- Virtual Journal - Volume 14, Issue 27 - article #12
- Christian I. Johnson, Nelson Caldwell, R. Michael Rich, Catherine A. Pilachowski, Tiffany Hsyu
- http://arxiv.org/abs/1606.08491
The Chemical Composition of Red Giant Branch Stars in the Galactic Globular Clusters NGC 6342 and NGC 6366
- Virtual Journal - Volume 14, Issue 27 - article #19
- Christian I. Johnson, Nelson Caldwell, R. Michael Rich, Catherine A. Pilachowski,, Tiffany Hsyu
- The Astronomical Journal
- http://iopscience.iop.org/1538-3881/152/1/21
AGB Sodium Abundances in the Globular Cluster 47 Tucanae (NGC 104)
- Virtual Journal - Volume 13, Issue 5 - article #24
- Christian I. Johnson, Iain McDonald, Catherine A. Pilachowski, Mario Mateo, John I. Bailey III, Maria J. Cordero, Albert A. Zijlstra, Jeffrey D. Crane, Edward Olszewski, Stephen A. Shectman, and Ian Thompson
- Astronomical Journal - Volume: 149, Issue: 2
- View article PDF (1.43 MB)
Light-Element Abundances of Giant Stars in the Globular Cluster M71 (NGC 6838)
- Virtual Journal - Volume 13, Issue 2 - article #5
- Maria J. Cordero, Catherine A. Pilachowski, Christian I. Johnson, Enrico Vesperini
- arXiv.org - Astrophysics - Volume: 2015, Issue: 16 Jan
- arXiv:1501.03190 [pdf, ps, other]
AGB Sodium Abundances in the Globular Cluster 47 Tucanae (NGC 104)
- Virtual Journal - Volume 12, Issue 25 - article #13
- Christian I. Johnson, Iain McDonald, Catherine A. Pilachowski, Mario Mateo, John I. Bailey III, Maria J. Cordero, Albert A. Zijlstra, Jeffrey D. Crane, Edward Olszewski, Stephen A. Shectman, Ian Thompson
- arXiv.org - Astrophysics - Volume: 2014, Issue: 19 Dec
- arXiv:1412.4108 [pdf, ps, other]
Light, Alpha, and Fe-peak Element Abundances in the Galactic Bulge
- Virtual Journal - Volume 12, Issue 22 - article #84
- Christian I. Johnson, R. Michael Rich, Chiaki Kobayashi, Andrea Kunder, and Andreas Koch
- Astronomical Journal - Volume: 148, Issue: 4
- View article PDF (3.76 MB)
Light, Alpha, and Fe-Peak Element Abundances in the Galactic Bulge
- Virtual Journal - Volume 12, Issue 20 - article #9
- Christian I. Johnson, R. Michael Rich, Chiaki Kobayashi, Andrea Kunder, Andreas Koch
- arXiv.org - Astrophysics - Volume: 2014, Issue: 11 Jul
- arXiv:1407.2282 [pdf, ps, other]
The Metal-poor Knee in the Fornax Dwarf Spheroidal Galaxy
- Virtual Journal - Volume 12, Issue 17 - article #55
- Benjamin Hendricks, Andreas Koch, Gustavo A. Lanfranchi, Corrado Boeche, Matthew Walker, Christian I. Johnson, Jorge PeÃ±arrubia, and Gerard Gilmore
- The Astrophysical Journal - Volume: 785, Issue: 2
- View article PDF (1.10 MB)
The metal-poor Knee in the Fornax Dwarf Spheroidal Galaxy
- Virtual Journal - Volume 12, Issue 9 - article #10
- Benjamin Hendricks, Andreas Koch, Gustavo A. Lanfranchi, Corrado Boeche, Matthew Walker, Christian I. Johnson, Jorge Penarrubia, Gerard Gilmore
- arXiv.org - Astrophysics - Volume: 2014, Issue: 28 Feb
- arXiv:1402.6328 [pdf, ps, other]
Detailed Abundances for a Large Sample of Giant Stars in the Globular Cluster 47 Tucanae (NGC 104)
- Virtual Journal - Volume 11, Issue 45 - article #3
- Maria J. Cordero, Catherine A. Pilachowski, Christian I. Johnson, Iain McDonald, Albert A. Zijlstra, Jennifer Simmerer
- arXiv.org - Astrophysics - Volume: 2013, Issue: 8 Nov
- arXiv:1311.1541 [pdf, ps, other]
Metallicity Distribution Functions, Radial Velocities, and Alpha Element Abundances in Three Off-axis Bulge Fields
- Virtual Journal - Volume 11, Issue 10 - article #32
- Christian I. Johnson, R. Michael Rich, Chiaki Kobayashi, Andrea Kunder, Catherine A. Pilachowski, Andreas Koch, and Roberto de Propris
- The Astrophysical Journal - Volume: 765, Issue: 2
- Abstract References Full text PDF (16.11 MB) Enhanced article HTML
Metallicity Distribution Functions, Radial Velocities, and Alpha Element Abundances in Three Off-Axis Bulge Fields
- Virtual Journal - Volume 11, Issue 8 - article #8
- Christian I. Johnson, R. Michael Rich, Chiaki Kobayashi, Andrea Kunder, Catherine A. Pilachowski, Andreas Koch, Roberto De Propris
- arXiv.org - Astrophysics - Volume: 2013, Issue: 22 Feb
- arXiv:1302.3679 [pdf, ps, other]
Oxygen and Sodium Abundances in M13 (NGC 6205) Giants: Linking Globular Cluster Formation Scenarios, Deep Mixing, and Post-RGB Evolution
- Virtual Journal - Volume 10, Issue 29 - article #32
- Christian I. Johnson and Catherine A. Pilachowski
- The Astrophysical Journal Letters - Volume: 754, Issue: 2
- Abstract References Full text PDF (526 KB) HTML with Enhancements
Oxygen and Sodium Abundances in M13 (NGC 6205) Giants: Linking Globular Cluster Formation Scenarios, Deep Mixing, and Post-RGB Evolution
- Virtual Journal - Volume 10, Issue 28 - article #13
- Christian I. Johnson, Catherine A. Pilachowski
- arXiv.org - Astrophysics - Volume: 2012, Issue: 13 Jul
- arXiv:1207.1919 [pdf, ps, other]
Constraints on the Formation of the Galactic Bulge from Na, Al, and Heavy-element Abundances in Plaut's Field
- Virtual Journal - Volume 10, Issue 14 - article #65
- Christian I. Johnson, R. Michael Rich, Chiaki Kobayashi and Jon P. Fulbright
- The Astrophysical Journal - Volume: 749, Issue: 2
- Abstract References Full text PDF (2.37 MB) View as HTML
Constraints on the Formation of the Galactic Bulge from Na, Al, and Heavy Element Abundances in Plaut's Field
- Virtual Journal - Volume 10, Issue 8 - article #2
- Christian I. Johnson, R. Michael Rich, Chiaki Kobayashi, Jon P. Fulbright
- arXiv.org - Astrophysics - Volume: 2012, Issue: 24 Feb
- arXiv:1202.4481 [pdf, ps, other]
Chemical Abundances of Red Giant Stars in the Globular Cluster M107 (NGC 6171)
- Virtual Journal - Volume 9, Issue 35 - article #1
- Julia E. O'Connell, Christian I. Johnson, Catherine A. Pilachowski, Geoffrey Burks
- arXiv.org - Astrophysics - Volume: 2011, Issue: 2 Sep
- arXiv:1108.5200 [pdf, ps, other]
Multiple populations in Omega Centauri: a cluster analysis of spectroscopic data
- Virtual Journal - Volume 9, Issue 22 - article #5
- Raffaele Gratton, Christian I. Johnson, Sara Lucatello, Valentina D'Orazi, Catherine A. Pilachowski
- arXiv.org - Astrophysics - Volume: 2011, Issue: 3 Jun
- arXiv:1105.5544 [pdf, ps, other]
Spitzer spectra of evolved stars in omega Centauri and their low-metallicity dust production
- Virtual Journal - Volume 9, Issue 17 - article #6
- Iain McDonald, Jacco Th. van Loon, Gregory C. Sloan, Andrea K. Dupree, Albert A. Zijlstra, Martha L. Boyer, Robert D. Gehrz, Aneurin Evans, Charles E. Woodward, Christian I. Johnson
- arXiv.org - Astrophysics - Volume: 2011, Issue: 29 Apr
- arXiv:1104.5155 [pdf, ps, other]
Alpha Enhancement and the Metallicity Distribution Function of Plaut's Window
- Virtual Journal - Volume 9, Issue 11 - article #4
- Christian I. Johnson, R. Michael Rich, Jon P. Fulbright, Elena Valenti, Andrew McWilliam
- arXiv.org - Astrophysics - Volume: 2011, Issue: 18 Mar
- arXiv:1103.2143 [pdf, ps, other]
Fe and Al Abundances for 180 Red Giants in the Globular Cluster Omega Centauri (NGC 5139)
- Virtual Journal - Volume 6, Issue 28 - article #29
- Christian I. Johnson, Catherine A. Pilachowski, Jennifer Simmerer, and Dustin Schwenk
- The Astrophysical Journal - Volume: 681, Issue: 2
- Abstract-Full Text with Enhancements-PDF Version (1930 kB)
Fe and Al Abundances for 180 Red Giants in the Globular Cluster Omega Centauri (NGC 5139)
- Virtual Journal - Volume 6, Issue 16 - article #7
- Christian I. Johnson, Catherine A. Pilachowski, Jennifer Simmerer, Dustin Schwenk
- arXiv.org - Astrophysics - Volume: 2008, Issue: 17 Apr
- arXiv:0804.2607 [ps, pdf, other]

Results 1 - 28 of 28

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