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Results 1 - 25 of 25

High-precision abundances of elements in solar-type stars. Evidence of two distinct sequences in abundance-age relations. (arXiv:2006.06013v1 [astro-ph.SR])
- Virtual Journal - Volume 18, Issue 24 - article #3
- P. E. Nissen, J. Christensen-Dalsgaard, J. R. Mosumgaard, V. Silva Aguirre, E. Spitoni, K. Verma. (Stellar Astrophysics Centre, Department of Physics, Astronomy, Aarhus University, Denmark.)
- http://arxiv.org/abs/2006.06013
Carbon and oxygen in metal-poor halo starsâ‹†
- Virtual Journal - Volume 17, Issue 5 - article #5
- A. M. Amarsi, P. E. Nissen, M. Asplund, K. Lind, P. S. Barklem
- Astronomy & Astrophysics
- http://feedproxy.google.com/~r/edp_aa/~3/QTipYx6aF8Y/201834480
The [Y/Mg] clock works for evolved solar metallicity starsâ‹†
- Virtual Journal - Volume 15, Issue 32 - article #16
- D. Slumstrup, F. Grundahl, K. Brogaard, A. O. Thygesen, P. E. Nissen, J. Jessen-Hansen, V. Van Eylen, M. G. Pedersen
- Astronomy & Astrophysics
- http://feedproxy.google.com/~r/edp_aa/~3/Bbou_ySa754/201731492
Sun-like stars unlike the Sun: Clues for chemical anomaliesof cool stars
- Virtual Journal - Volume 15, Issue 19 - article #14
- V. Adibekyan, E. Delgado-Mena, S. Feltzing, J. I. GonzÃƒÂ¡lez HernÃƒÂ¡ndez, N. R. Hinkel, A. J. Korn, M. Asplund, P. G. Beck, M. Deal, B. Gustafsson, S. Honda, K. Lind, P. E. Nissen, L. Spina
- John Wiley & Sons, Inc.
- http://onlinelibrary.wiley.com/resolve/doi?DOI=10.1002%2Fasna.201713315
Sc and neutron-capture abundances in Galactic low- and high-alpha field halo stars. (arXiv:1701.02423v1 [astro-ph.SR])
- Virtual Journal - Volume 15, Issue 2 - article #12
- C. K. Fishlock, D. Yong, A. I. Karakas, A. Alves-Brito, J. Melendez, P. E. Nissen, C. Kobayashi, A. R. Casey
- http://arxiv.org/abs/1701.02423
High-precision abundances of Sc, Mn, Cu, and Ba in solar twins. Trends of element ratios with stellar age. (arXiv:1606.08399v1 [astro-ph.SR])
- Virtual Journal - Volume 14, Issue 27 - article #6
- P. E. Nissen
- http://arxiv.org/abs/1606.08399
Red Giant Stars from Sloan Digital Sky Survey. I. The General Field
- Virtual Journal - Volume 12, Issue 23 - article #144
- Y. Q. Chen, G. Zhao, K. Carrell, J. K. Zhao, K. F. Tan, P. E. Nissen, and P. Wei
- The Astrophysical Journal - Volume: 795, Issue: 1
- View article PDF (1.28 MB)
Carbon and oxygen abundances in stellar populations
- Virtual Journal - Volume 12, Issue 22 - article #92
- P. E. Nissen, Y. Q. Chen, L. Carigi, W. J. Schuster and G. Zhao
- Astronomy and Astrophysics - Volume: 568, Issue: August 2014
- http://dx.doi.org/10.1051/0004-6361/201424184
  Abstract Full HTML PDF (941.6 KB) ePUB (2.056 MB) References Online Material Tables at CDS NASA ADS Abstract Service
Three Ancient Halo Subgiants: Precise Parallaxes, Compositions, Ages, and Implications for Globular Clusters
- Virtual Journal - Volume 12, Issue 22 - article #135
- Don A. VandenBerg, Howard E. Bond, Edmund P. Nelan, P. E. Nissen, Gail H. Schaefer, and Dianne Harmer
- The Astrophysical Journal - Volume: 792, Issue: 2
- View article PDF (1.47 MB)
Three Ancient Halo Subgiants: Precise Parallaxes, Compositions, Ages, and Implications for Globular Clusters
- Virtual Journal - Volume 12, Issue 21 - article #16
- Don A. VandenBerg, Howard E. Bond, Edmund P. Nelan, P. E. Nissen, Gail H. Schaefer, Dianne Harmer
- arXiv.org - Astrophysics - Volume: 2014, Issue: 1 Aug
- arXiv:1407.7591 [pdf, ps, other]
StrÃ¶mgren Survey for Asteroseismology and Galactic Archaeology: Let the SAGA Begin
- Virtual Journal - Volume 12, Issue 20 - article #276
- L. Casagrande, V. Silva Aguirre, D. Stello, D. Huber, A. M. Serenelli, S. Cassisi, A. Dotter, A. P. Milone, S. Hodgkin, A. F. Marino, M. N. Lund, A. Pietrinferni, M. Asplund, S. Feltzing, C. Flynn, F. Grundahl, P. E. Nissen, R. SchÃƒÂ¶nrich, K. J. Schlesinger, and W. Wang
- The Astrophysical Journal - Volume: 787, Issue: 2
- View article PDF (5.52 MB)
Two distinct halo populations in the solar neighborhood - IV. Lithium abundances
- Virtual Journal - Volume 10, Issue 51 - article #51
- P. E. Nissen and W. J. Schuster
- Astronomy and Astrophysics - Volume: 543, Issue: July 2012
- http://dx.doi.org/10.1051/0004-6361/201219342
  Abstract | Full HTML | PDF (334.2 KB) | References | Online Material | SIMBAD record | NASA ADS Abstract Service
Abundances of neutron-capture elements in G 24-25. A halo-population CH subgiant
- Virtual Journal - Volume 10, Issue 13 - article #5
- S. Liu, P. E. Nissen, W. J. Schuster, G. Zhao, Y. Q. Chen, Y. C. Liang
- arXiv.org - Astrophysics - Volume: 2012, Issue: 30 Mar
- arXiv:1203.5682 [pdf, ps, other]
The C/O ratio at low metallicity: constraints on early chemical evolution from observations of Galactic halo stars
- Virtual Journal - Volume 7, Issue 27 - article #32
- D. Fabbian, P. E. Nissen, M. Asplund, M. Pettini, and C. Akerman
- Astronomy and Astrophysics - Volume: 500, Issue: 3
- Abstract | PDF file (304.6 KB) | PS file (154.0 KB)
The Barium Isotopic Abundance in the Metal-Poor Star HD140283
- Virtual Journal - Volume 6, Issue 49 - article #13
- R. Collet, M. Asplund, P. E. Nissen
- arXiv.org - Astrophysics - Volume: 2008, Issue: 4 Dec
- arXiv:0811.4586 [ps, pdf, other]
Oxygen abundances in metal-poor subgiants as determined from [O I], O I and OH lines
- Virtual Journal - Volume 4, Issue 18 - article #21
- A. E. GarcÃa PÃ©rez, M. Asplund, F. Primas, P. E. Nissen and B. Gustafsson
- Astronomy and Astrophysics - Volume 451, Issue 2 - May, 2006
- Abstract, Full HTML, PDF file (1.27 MB), PS file (360 KB), References
Chemical abundances in 43 metal-poor stars
- Virtual Journal - Volume 3, Issue 34 - article #33
- K. Jonsell, B. Edvardsson, B. Gustafsson, P. Magain, P. E. Nissen and M. Asplund
- Astronomy and Astrophysics - Vol. 440 No. 1 – August 2005
- Abstract , Full HTML, PDF file (692 KB) , PS file (265 KB) , References
Abundances in giant stars of the globular cluster NGC 6752
- Virtual Journal - Volume 3, Issue 29 - article #15
- D. Yong, F. Grundahl, P. E. Nissen, H. R. Jensen and D. L. Lambert
- Astronomy and Astrophysics - Vol. 438 No. 3 – July 2005
- Abstract , Full HTML, PDF file (467 KB) , PS file (165 KB)
The [Zn/Fe] - [Fe/H] trend for disk and halo stars
- Virtual Journal - Volume 2, Issue 38 - article #42
- Y. Q. Chen, P. E. Nissen and G. Zhao
- Astronomy and Astrophysics – Vol 425 No 2 – October 2004
- Abstract , Full HTML , PDF file (265 KB) , PS file (101 KB) , References
uvby-β photometry of high-velocity and metal-poor stars - X. Stars of very low metal abundance: Observations, reddenings, metallicities, classifications, distances, and relative ages
- Virtual Journal - Volume 2, Issue 28 - article #19
- W. J. Schuster, T. C. Beers, R. Michel, P. E. Nissen and G. GarcÃa
- Astronomy and Astrophysics – Vol 422 No 2 – July 2004
- Abstract , PDF file (536 KB) , PS file (534 KB)
The [Zn/Fe] -- [Fe/H] trend for disk and halo stars
- Virtual Journal - Volume 2, Issue 26 - article #29
- Y.Q. Chen (National Astronomical Observatories, China), P. E. Nissen (Institute of Physics and Astronomy, University of Aarhus, Denmark), G. Zhao (National Astronomical Observatories, China)
- arXiv - Astrophysics – July 04
- astro-ph/0406612 [ abs , ps , pdf , other ]
uvby β photometry of high-velocity and metal-poor stars X. Stars of very low metal abundance: observations, reddenings, metallicities, classifications, distances, and relative ages
- Virtual Journal - Volume 2, Issue 13 - article #22
- W. J. Schuster, T. C. Beers, R. Michel, P. E. Nissen, G. Garcia
- arXiv.org – Astrophysics – March 2004
- astro-ph/0403637 [ abs , ps , pdf , other ]
Sulphur and zinc abundances in Galactic stars and damped Ly α systems
- Virtual Journal - Volume 2, Issue 6 - article #27
- P. E. Nissen, Y. Q. Chen, M. Asplund and M. Pettini
- Astronomy and Astrophysics - Vol. 415 No. 3
- Abstract , Full HTML , PDF file (489 KB) , PS file (149 KB)
The evolution of the C/O ratio in metal-poor halo stars
- Virtual Journal - Volume 2, Issue 4 - article #36
- C. J. Akerman, L. Carigi, P. E. Nissen, M. Pettini and M. Asplund
- Astronomy and Astrophysics - Vol. 414 No. 3
- Abstract , Full HTML, PDF file (354 KB) , PS file (133 KB)
Chemical Abundances of Old Metal-rich Stars in the Solar Neighborhood
- Virtual Journal - Volume 1, Issue 1 - article #11
- Y. Q. Chen, G. Zhao, P. E. Nissen, G. S. Bai, and H. M. Qiu
- The Astrophysical Journal, Volume 591, Number 2, Part 1
- ABSTRACT , FULL TEXT , PDF (222kb), PS

Results 1 - 25 of 25

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