SpaceInn hare-and-hounds exercise: Estimation of stellar properties using space-based asteroseismic data

Research output: Contribution to journalArticlepeer-review

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SpaceInn hare-and-hounds exercise : Estimation of stellar properties using space-based asteroseismic data. / Reese, D. R.; Chaplin, W. J.; Davies, G. R.; Miglio, A.; Antia, H. M.; Ball, Warrick; Basu, S.; Buldgen, G.; Christensen-Dalsgaard, J.; Coelho, H. R.; Hekker, S.; Houdek, G.; Lebreton, Y.; Mazumdar, A.; Metcalfe, T. S.; Aguirre, V. Silva; Stello, D.; Verma, K.

In: Astronomy and Astrophysics, Vol. 592, A14, 08.2016.

Research output: Contribution to journalArticlepeer-review

Harvard

Reese, DR, Chaplin, WJ, Davies, GR, Miglio, A, Antia, HM, Ball, W, Basu, S, Buldgen, G, Christensen-Dalsgaard, J, Coelho, HR, Hekker, S, Houdek, G, Lebreton, Y, Mazumdar, A, Metcalfe, TS, Aguirre, VS, Stello, D & Verma, K 2016, 'SpaceInn hare-and-hounds exercise: Estimation of stellar properties using space-based asteroseismic data', Astronomy and Astrophysics, vol. 592, A14. https://doi.org/10.1051/0004-6361/201527987

APA

Reese, D. R., Chaplin, W. J., Davies, G. R., Miglio, A., Antia, H. M., Ball, W., Basu, S., Buldgen, G., Christensen-Dalsgaard, J., Coelho, H. R., Hekker, S., Houdek, G., Lebreton, Y., Mazumdar, A., Metcalfe, T. S., Aguirre, V. S., Stello, D., & Verma, K. (2016). SpaceInn hare-and-hounds exercise: Estimation of stellar properties using space-based asteroseismic data. Astronomy and Astrophysics, 592, [A14]. https://doi.org/10.1051/0004-6361/201527987

Vancouver

Author

Reese, D. R. ; Chaplin, W. J. ; Davies, G. R. ; Miglio, A. ; Antia, H. M. ; Ball, Warrick ; Basu, S. ; Buldgen, G. ; Christensen-Dalsgaard, J. ; Coelho, H. R. ; Hekker, S. ; Houdek, G. ; Lebreton, Y. ; Mazumdar, A. ; Metcalfe, T. S. ; Aguirre, V. Silva ; Stello, D. ; Verma, K. / SpaceInn hare-and-hounds exercise : Estimation of stellar properties using space-based asteroseismic data. In: Astronomy and Astrophysics. 2016 ; Vol. 592.

Bibtex

@article{02f2f1d1220b48088a322cf8ca954af9,
title = "SpaceInn hare-and-hounds exercise: Estimation of stellar properties using space-based asteroseismic data",
abstract = "Context: Detailed oscillation spectra comprising individual frequencies for numerous solar-type stars and red giants are or will become available. These data can lead to a precise characterisation of stars. Aims: Our goal is to test and compare different methods for obtaining stellar properties from oscillation frequencies and spectroscopic constraints, in order to evaluate their accuracy and the reliability of the error bars. Methods: In the context of the SpaceInn network, we carried out a hare-and-hounds exercise in which one group produced {"}observed{"} oscillation spectra for 10 artificial solar-type stars, and various groups characterised these stars using either forward modelling or acoustic glitch signatures. Results: Results based on the forward modelling approach were accurate to 1.5 % (radius), 3.9 % (mass), 23 % (age), 1.5 % (surface gravity), and 1.8 % (mean density). For the two 1 Msun stellar targets, the accuracy on the age is better than 10 % thereby satisfying PLATO 2.0 requirements. The average accuracies for the acoustic radii of the base of the convection zone, the He II ionisation, and the Gamma_1 peak were 17 %, 2.4 %, and 1.9 %, respectively. Glitch fitting analysis seemed to be affected by aliasing problems for some of the targets. Conclusions: Forward modelling is the most accurate approach, but needs to be complemented by model-independent results from, e.g., glitch analysis. Furthermore, global optimisation algorithms provide more robust error bars.",
keywords = "astro-ph.SR",
author = "Reese, {D. R.} and Chaplin, {W. J.} and Davies, {G. R.} and A. Miglio and Antia, {H. M.} and Warrick Ball and S. Basu and G. Buldgen and J. Christensen-Dalsgaard and Coelho, {H. R.} and S. Hekker and G. Houdek and Y. Lebreton and A. Mazumdar and Metcalfe, {T. S.} and Aguirre, {V. Silva} and D. Stello and K. Verma",
note = "29 pages, 13 figures, 20 tables, accepted in A",
year = "2016",
month = aug,
doi = "10.1051/0004-6361/201527987",
language = "English",
volume = "592",
journal = "Astronomy and Astrophysics",
issn = "0004-6361",
publisher = "EDP Sciences",

}

RIS

TY - JOUR

T1 - SpaceInn hare-and-hounds exercise

T2 - Estimation of stellar properties using space-based asteroseismic data

AU - Reese, D. R.

AU - Chaplin, W. J.

AU - Davies, G. R.

AU - Miglio, A.

AU - Antia, H. M.

AU - Ball, Warrick

AU - Basu, S.

AU - Buldgen, G.

AU - Christensen-Dalsgaard, J.

AU - Coelho, H. R.

AU - Hekker, S.

AU - Houdek, G.

AU - Lebreton, Y.

AU - Mazumdar, A.

AU - Metcalfe, T. S.

AU - Aguirre, V. Silva

AU - Stello, D.

AU - Verma, K.

N1 - 29 pages, 13 figures, 20 tables, accepted in A

PY - 2016/8

Y1 - 2016/8

N2 - Context: Detailed oscillation spectra comprising individual frequencies for numerous solar-type stars and red giants are or will become available. These data can lead to a precise characterisation of stars. Aims: Our goal is to test and compare different methods for obtaining stellar properties from oscillation frequencies and spectroscopic constraints, in order to evaluate their accuracy and the reliability of the error bars. Methods: In the context of the SpaceInn network, we carried out a hare-and-hounds exercise in which one group produced "observed" oscillation spectra for 10 artificial solar-type stars, and various groups characterised these stars using either forward modelling or acoustic glitch signatures. Results: Results based on the forward modelling approach were accurate to 1.5 % (radius), 3.9 % (mass), 23 % (age), 1.5 % (surface gravity), and 1.8 % (mean density). For the two 1 Msun stellar targets, the accuracy on the age is better than 10 % thereby satisfying PLATO 2.0 requirements. The average accuracies for the acoustic radii of the base of the convection zone, the He II ionisation, and the Gamma_1 peak were 17 %, 2.4 %, and 1.9 %, respectively. Glitch fitting analysis seemed to be affected by aliasing problems for some of the targets. Conclusions: Forward modelling is the most accurate approach, but needs to be complemented by model-independent results from, e.g., glitch analysis. Furthermore, global optimisation algorithms provide more robust error bars.

AB - Context: Detailed oscillation spectra comprising individual frequencies for numerous solar-type stars and red giants are or will become available. These data can lead to a precise characterisation of stars. Aims: Our goal is to test and compare different methods for obtaining stellar properties from oscillation frequencies and spectroscopic constraints, in order to evaluate their accuracy and the reliability of the error bars. Methods: In the context of the SpaceInn network, we carried out a hare-and-hounds exercise in which one group produced "observed" oscillation spectra for 10 artificial solar-type stars, and various groups characterised these stars using either forward modelling or acoustic glitch signatures. Results: Results based on the forward modelling approach were accurate to 1.5 % (radius), 3.9 % (mass), 23 % (age), 1.5 % (surface gravity), and 1.8 % (mean density). For the two 1 Msun stellar targets, the accuracy on the age is better than 10 % thereby satisfying PLATO 2.0 requirements. The average accuracies for the acoustic radii of the base of the convection zone, the He II ionisation, and the Gamma_1 peak were 17 %, 2.4 %, and 1.9 %, respectively. Glitch fitting analysis seemed to be affected by aliasing problems for some of the targets. Conclusions: Forward modelling is the most accurate approach, but needs to be complemented by model-independent results from, e.g., glitch analysis. Furthermore, global optimisation algorithms provide more robust error bars.

KW - astro-ph.SR

U2 - 10.1051/0004-6361/201527987

DO - 10.1051/0004-6361/201527987

M3 - Article

VL - 592

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

SN - 0004-6361

M1 - A14

ER -