Zobrazeno 1 - 10
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pro vyhledávání: '"Lyttle, Alexander J"'
Autor:
Saunders, Nicholas, van Saders, Jennifer L., Lyttle, Alexander J., Metcalfe, Travis S., Li, Tanda, Davies, Guy R., Hall, Oliver J., Ball, Warrick H., Townsend, Richard, Creevey, Orlagh, Dodds, Curt
Despite a growing sample of precisely measured stellar rotation periods and ages, the strength of magnetic braking and the degree of departure from standard (Skumanich-like) spindown have remained persistent questions, particularly for stars more evo
Externí odkaz:
http://arxiv.org/abs/2309.05666
Autor:
Willett, Emma, Miglio, Andrea, Mackereth, J. Ted, Chiappini, Cristina, Lyttle, Alexander J., Elsworth, Yvonne, Mosser, Benoît, Khan, Saniya, Anders, Friedrich, Casali, Giada, Grisoni, Valeria
The radial metallicity distribution of the Milky Way's disc is an important observational constraint for models of the formation and evolution of our Galaxy. It informs our understanding of the chemical enrichment of the Galactic disc and the dynamic
Externí odkaz:
http://arxiv.org/abs/2307.14422
Publikováno v:
2023MNRAS.523...80L
The detailed modelling of stellar oscillations is a powerful approach to characterising stars. However, poor treatment of systematics in theoretical models leads to misinterpretations of stars. Here we propose a more principled statistical treatment
Externí odkaz:
http://arxiv.org/abs/2306.02515
Autor:
Scutt, Owen J., Murphy, Simon J., Nielsen, Martin B., Davies, Guy R., Bedding, Timothy R., Lyttle, Alexander J.
Publikováno v:
Monthly Notices of the Royal Astronomical Society, Volume 525, Issue 4, November 2023, Pages 5235-5244
Young $\delta$ Scuti stars have proven to be valuable asteroseismic targets but obtaining robust uncertainties on their inferred properties is challenging. We aim to quantify the random uncertainties in grid-based modelling of $\delta$ Sct stars. We
Externí odkaz:
http://arxiv.org/abs/2302.11025
Autor:
Li, Tanda, Davies, Guy R., Lyttle, Alexander J., Ball, Warrick H., Carboneau, Lindsey M., Garcia, Rafael A.
Grid-based modelling is widely used for estimating stellar parameters. However, stellar model grid is sparse because of the computational cost. This paper demonstrates an application of a machine-learning algorithm using the Gaussian Process (GP) Reg
Externí odkaz:
http://arxiv.org/abs/2202.08398
Autor:
Lyttle, Alexander J., Davies, Guy R., Li, Tanda, Carboneau, Lindsey M., Leung, Ho-Hin, Westwood, Harry, Chaplin, William J., Hall, Oliver J., Huber, Daniel, Nielsen, Martin B., Basu, Sarbani, García, Rafael A.
With recent advances in modelling stars using high-precision asteroseismology, the systematic effects associated with our assumptions of stellar helium abundance ($Y$) and the mixing-length theory parameter ($\alpha_\mathrm{MLT}$) are becoming more i
Externí odkaz:
http://arxiv.org/abs/2105.04482
Akademický článek
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Autor:
Scutt, Owen J, Murphy, Simon J, Nielsen, Martin B, Davies, Guy R, Bedding, Timothy R, Lyttle, Alexander J
Publikováno v:
Monthly Notices of the Royal Astronomical Society; 11/15/2023, Vol. 525 Issue 4, p5235-5244, 10p
Autor:
Lyttle, Alexander J.
High-precision asteroseismology has improved estimates of stellar masses, radii, and ages. However, this has revealed inaccuracies in typical assumptions regarding properties such as helium abundance (Y) and the mixing-length theory parameter (α). W
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1c7e88c3c33119b16a669f241efb7f2f
Autor:
Lyttle, Alexander J, Davies, Guy R, Li, Tanda, Carboneau, Lindsey M, Leung, Ho-Hin, Westwood, Harry, Chaplin, William J, Hall, Oliver J, Huber, Daniel, Nielsen, Martin B, Basu, Sarbani, García, Rafael A
Publikováno v:
Monthly Notices of the Royal Astronomical Society; Aug2021, Vol. 505 Issue 2, p2427-2446, 20p