Zobrazeno 1 - 10
of 145
pro vyhledávání: '"Campbell, S. W."'
Autor:
Campbell, S. W., Constantino, T. N., D'Orazi, V., Meakin, C., Stello, D., Christensen-Dalsgaard, J., Kuehn, C., De Silva, G. M., Arnett, W. D., Lattanzio, J. C., MacLean, B. T.
Stellar models provide a vital basis for many aspects of astronomy and astrophysics. Recent advances in observational astronomy - through asteroseismology, precision photometry, high-resolution spectroscopy, and large-scale surveys - are placing stel
Externí odkaz:
http://hdl.handle.net/10150/621500
http://arizona.openrepository.com/arizona/handle/10150/621500
http://arizona.openrepository.com/arizona/handle/10150/621500
Abridged. We aim to better characterise the evolution and fates, and determine updated nucleosynthetic yields of intermediate-mass stars between primordial and EMP metallicity (Z=1e-10, 1e-8, 1e-7, 1e-6 and 1e-5). We also probed uncertainties in the
Externí odkaz:
http://arxiv.org/abs/2209.05587
Autor:
Andrassy, R., Higl, J., Mao, H., Mocák, M., Vlaykov, D. G., Arnett, W. D., Baraffe, I., Campbell, S. W., Constantino, T., Edelmann, P. V. F., Goffrey, T., Guillet, T., Herwig, F., Hirschi, R., Horst, L., Leidi, G., Meakin, C., Pratt, J., Rizzuti, F., Roepke, F. K., Woodward, P.
Publikováno v:
A&A 659, A193 (2022)
Our ability to predict the structure and evolution of stars is in part limited by complex, 3D hydrodynamic processes such as convective boundary mixing. Hydrodynamic simulations help us understand the dynamics of stellar convection and convective bou
Externí odkaz:
http://arxiv.org/abs/2111.01165
Publikováno v:
A&A 645, A10 (2021)
Abridged: Observed abundances of extremely metal-poor (EMP) stars in the Halo hold clues for the understanding of the ancient universe. Interpreting these clues requires theoretical stellar models at the low-Z regime. We provide the nucleosynthetic y
Externí odkaz:
http://arxiv.org/abs/2010.08449
Autor:
MacLean, B. T., Campbell, S. W., Amarsi, A. M., Nordlander, T., Cottrell, P. L., De Silva, G. M., Lattanzio, J., Constantino, T., DOrazi, V., Casagrande, L.
Several recent spectroscopic investigations have presented conflicting results on the existence of Na-rich asymptotic giant branch (AGB) stars in the Galactic globular cluster M4 (NGC6121). The studies disagree on whether or not Na-rich red giant bra
Externí odkaz:
http://arxiv.org/abs/1808.06735
Autor:
MacLean, B. T., Campbell, S. W., De Silva, G. M., Lattanzio, J., DOrazi, V., Cottrell, P. L., Momany, Y., Casagrande, L.
It has been well established that Galactic Globular clusters (GCs) harbour more than one stellar population, distinguishable by the anti-correlations of light element abundances (C-N, Na-O, and Mg-Al). These studies have been extended recently to the
Externí odkaz:
http://arxiv.org/abs/1712.03340
Autor:
Campbell, S. W., MacLean, B. T., D'Orazi, V., Casagrande, L., de Silva, G. M., Yong, D., Cottrell, P. L., Lattanzio, J. C.
Publikováno v:
A&A 605, A98 (2017)
A recent study reported a strong apparent depression of Fe I, relative to Fe II, in the AGB stars of NGC 6752. This depression is much greater than that expected from the neglect of non-local thermodynamic equilibrium effects, in particular the domin
Externí odkaz:
http://arxiv.org/abs/1707.02840
Autor:
MacLean, B. T., Campbell, S. W., De Silva, G. M., Lattanzio, J., DOrazi, V., Simpson, J. D., Momany, Y.
Galactic Globular clusters (GCs) are now known to harbour multiple stellar populations, which are chemically distinct in many light element abundances. It is becoming increasingly clear that asymptotic giant branch (AGB) stars in GCs show different a
Externí odkaz:
http://arxiv.org/abs/1604.05040
Autor:
Campbell, S. W., Constantino, T. N., D'Orazi, V., Meakin, C., Stello, D., Christensen-Dalsgaard, J., Kuehn, C., De Silva, G. M., Arnett, W. D., Lattanzio, J. C., MacLean, B. T.
Stellar models provide a vital basis for many aspects of astronomy and astrophysics. Recent advances in observational astronomy -- through asteroseismology, precision photometry, high-resolution spectroscopy, and large-scale surveys -- are placing st
Externí odkaz:
http://arxiv.org/abs/1512.04774
Publikováno v:
A&A 583, A77 (2015)
We explore modifications to the current scenario for the slow neutron capture process in asymptotic giant branch (AGB) stars to account for the Pb deficiency observed in post-AGB stars of low metallicity ([Fe/H] ~ -1.2) and low initial mass (~ 1 - 1.
Externí odkaz:
http://arxiv.org/abs/1509.03518