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Properties of the Hyades, the eclipsing binary HD27130, and the oscillating red giant epsilon Tauri

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Properties of the Hyades, the eclipsing binary HD27130, and the oscillating red giant epsilon Tauri. / Brogaard, K.; Pakstiene, E.; Grundahl, F. et al.

I: Astronomy & Astrophysics, Bind 645, 25, 01.2021.

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

Harvard

Brogaard, K, Pakstiene, E, Grundahl, F, Mikolaitis, S, Tautvaisiene, G, Slumstrup, D, Talens, GJJ, VandenBerg, DA, Miglio, A, Arentoft, T, Kjeldsen, H, Janulis, R, Drazdauskas, A, Marchini, A, Minkeviciute, R, Stonkute, E, Bagdonas, V, Andersen, MF, Jessen-Hansen, J, Palle, PL, Dorval, P, Snellen, IAG, Otten, GPPL & White, TR 2021, 'Properties of the Hyades, the eclipsing binary HD27130, and the oscillating red giant epsilon Tauri', Astronomy & Astrophysics, bind 645, 25. https://doi.org/10.1051/0004-6361/202039250

APA

Brogaard, K., Pakstiene, E., Grundahl, F., Mikolaitis, S., Tautvaisiene, G., Slumstrup, D., Talens, G. J. J., VandenBerg, D. A., Miglio, A., Arentoft, T., Kjeldsen, H., Janulis, R., Drazdauskas, A., Marchini, A., Minkeviciute, R., Stonkute, E., Bagdonas, V., Andersen, M. F., Jessen-Hansen, J., ... White, T. R. (2021). Properties of the Hyades, the eclipsing binary HD27130, and the oscillating red giant epsilon Tauri. Astronomy & Astrophysics, 645, [25]. https://doi.org/10.1051/0004-6361/202039250

CBE

Brogaard K, Pakstiene E, Grundahl F, Mikolaitis S, Tautvaisiene G, Slumstrup D, Talens GJJ, VandenBerg DA, Miglio A, Arentoft T, et al. 2021. Properties of the Hyades, the eclipsing binary HD27130, and the oscillating red giant epsilon Tauri. Astronomy & Astrophysics. 645:Article 25. https://doi.org/10.1051/0004-6361/202039250

MLA

Vancouver

Brogaard K, Pakstiene E, Grundahl F, Mikolaitis S, Tautvaisiene G, Slumstrup D et al. Properties of the Hyades, the eclipsing binary HD27130, and the oscillating red giant epsilon Tauri. Astronomy & Astrophysics. 2021 jan.;645:25. doi: 10.1051/0004-6361/202039250

Author

Brogaard, K. ; Pakstiene, E. ; Grundahl, F. et al. / Properties of the Hyades, the eclipsing binary HD27130, and the oscillating red giant epsilon Tauri. I: Astronomy & Astrophysics. 2021 ; Bind 645.

Bibtex

@article{e37e1c5e8e8344dea507a87af8eb299e,
title = "Properties of the Hyades, the eclipsing binary HD27130, and the oscillating red giant epsilon Tauri",
abstract = "Context. The derivation of accurate and precise masses and radii is possible for eclipsing binary stars, allowing for insights into their evolution. When residing in star clusters, they provide measurements of even greater precision, along with additional information on their properties. Asteroseismic investigations of solar-like oscillations offers similar possibilities for single stars.Aims. We wish to improve the previously established properties of the Hyades eclipsing binary HD 27130 and re-assess the asteroseismic properties of the giant star E Tau. The physical properties of these members of the Hyades can be used to constrain the helium content and age of the cluster.Methods. New multi-colour light curves were combined with multi-epoch radial velocities to yield masses and radii of HD 27130. Measurements of T-eff were derived from spectroscopy and photometry, and verified using the Gaia parallax. We estimated the cluster age from re-evaluated asteroseismic properties of E Tau while using HD 27130 to constrain the helium content.Results. The masses, radii, and T-eff of HD 27130 were found to be M=1.0245 0.0024 M-circle dot, R=0.9226 +/- 0.015 R-circle dot, T-eff=5650 +/- 50 K for the primary, and M=0.7426 +/- 0.0016 M-circle dot, R=0.7388 +/- 0.026 R-circle dot, T-eff=4300 +/- 100 K for the secondary component. Our re-evaluation of E Tau suggests that the previous literature estimates are trustworthy and that the HIPPARCOS parallax is more reliable than the Gaia DR2 parallax.Conclusions. The helium content of HD 27130 and, thus, of the Hyades is found to be Y=0.27 but with a significant model dependency. Correlations with the adopted metallicity result in a robust helium enrichment law, with Delta Y/Delta Z close to 1.2 We estimate the age of the Hyades to be 0.9 +/- 0.1 (stat) +/- 0.1 (sys) Gyr, which is in slight tension with recent age estimates based on the cluster white dwarfs. The precision of the age estimate can be much improved via asteroseismic investigations of the other Hyades giants and by future improvements to the Gaia parallax for bright stars.",
keywords = "binaries: eclipsing, open clusters and associations: individual: Hyades, stars: oscillations, stars: abundances, stars: individual: HD27130, stars: individual: E Tau, ASTEROSEISMIC MASS, RADIAL-VELOCITY, OPEN CLUSTERS, NGC 6791, DISTANCE, SOLAR, STARS, MODELS, EVOLUTION, SPECTRA",
author = "K. Brogaard and E. Pakstiene and F. Grundahl and S. Mikolaitis and G. Tautvaisiene and D. Slumstrup and Talens, {G. J. J.} and VandenBerg, {D. A.} and A. Miglio and T. Arentoft and H. Kjeldsen and R. Janulis and A. Drazdauskas and A. Marchini and R. Minkeviciute and E. Stonkute and V. Bagdonas and Andersen, {M. Fredslund} and J. Jessen-Hansen and Palle, {P. L.} and P. Dorval and Snellen, {I. A. G.} and Otten, {G. P. P. L.} and White, {T. R.}",
year = "2021",
month = jan,
doi = "10.1051/0004-6361/202039250",
language = "English",
volume = "645",
journal = "Astronomy & Astrophysics",
issn = "0004-6361",
publisher = "E D P Sciences",

}

RIS

TY - JOUR

T1 - Properties of the Hyades, the eclipsing binary HD27130, and the oscillating red giant epsilon Tauri

AU - Brogaard, K.

AU - Pakstiene, E.

AU - Grundahl, F.

AU - Mikolaitis, S.

AU - Tautvaisiene, G.

AU - Slumstrup, D.

AU - Talens, G. J. J.

AU - VandenBerg, D. A.

AU - Miglio, A.

AU - Arentoft, T.

AU - Kjeldsen, H.

AU - Janulis, R.

AU - Drazdauskas, A.

AU - Marchini, A.

AU - Minkeviciute, R.

AU - Stonkute, E.

AU - Bagdonas, V.

AU - Andersen, M. Fredslund

AU - Jessen-Hansen, J.

AU - Palle, P. L.

AU - Dorval, P.

AU - Snellen, I. A. G.

AU - Otten, G. P. P. L.

AU - White, T. R.

PY - 2021/1

Y1 - 2021/1

N2 - Context. The derivation of accurate and precise masses and radii is possible for eclipsing binary stars, allowing for insights into their evolution. When residing in star clusters, they provide measurements of even greater precision, along with additional information on their properties. Asteroseismic investigations of solar-like oscillations offers similar possibilities for single stars.Aims. We wish to improve the previously established properties of the Hyades eclipsing binary HD 27130 and re-assess the asteroseismic properties of the giant star E Tau. The physical properties of these members of the Hyades can be used to constrain the helium content and age of the cluster.Methods. New multi-colour light curves were combined with multi-epoch radial velocities to yield masses and radii of HD 27130. Measurements of T-eff were derived from spectroscopy and photometry, and verified using the Gaia parallax. We estimated the cluster age from re-evaluated asteroseismic properties of E Tau while using HD 27130 to constrain the helium content.Results. The masses, radii, and T-eff of HD 27130 were found to be M=1.0245 0.0024 M-circle dot, R=0.9226 +/- 0.015 R-circle dot, T-eff=5650 +/- 50 K for the primary, and M=0.7426 +/- 0.0016 M-circle dot, R=0.7388 +/- 0.026 R-circle dot, T-eff=4300 +/- 100 K for the secondary component. Our re-evaluation of E Tau suggests that the previous literature estimates are trustworthy and that the HIPPARCOS parallax is more reliable than the Gaia DR2 parallax.Conclusions. The helium content of HD 27130 and, thus, of the Hyades is found to be Y=0.27 but with a significant model dependency. Correlations with the adopted metallicity result in a robust helium enrichment law, with Delta Y/Delta Z close to 1.2 We estimate the age of the Hyades to be 0.9 +/- 0.1 (stat) +/- 0.1 (sys) Gyr, which is in slight tension with recent age estimates based on the cluster white dwarfs. The precision of the age estimate can be much improved via asteroseismic investigations of the other Hyades giants and by future improvements to the Gaia parallax for bright stars.

AB - Context. The derivation of accurate and precise masses and radii is possible for eclipsing binary stars, allowing for insights into their evolution. When residing in star clusters, they provide measurements of even greater precision, along with additional information on their properties. Asteroseismic investigations of solar-like oscillations offers similar possibilities for single stars.Aims. We wish to improve the previously established properties of the Hyades eclipsing binary HD 27130 and re-assess the asteroseismic properties of the giant star E Tau. The physical properties of these members of the Hyades can be used to constrain the helium content and age of the cluster.Methods. New multi-colour light curves were combined with multi-epoch radial velocities to yield masses and radii of HD 27130. Measurements of T-eff were derived from spectroscopy and photometry, and verified using the Gaia parallax. We estimated the cluster age from re-evaluated asteroseismic properties of E Tau while using HD 27130 to constrain the helium content.Results. The masses, radii, and T-eff of HD 27130 were found to be M=1.0245 0.0024 M-circle dot, R=0.9226 +/- 0.015 R-circle dot, T-eff=5650 +/- 50 K for the primary, and M=0.7426 +/- 0.0016 M-circle dot, R=0.7388 +/- 0.026 R-circle dot, T-eff=4300 +/- 100 K for the secondary component. Our re-evaluation of E Tau suggests that the previous literature estimates are trustworthy and that the HIPPARCOS parallax is more reliable than the Gaia DR2 parallax.Conclusions. The helium content of HD 27130 and, thus, of the Hyades is found to be Y=0.27 but with a significant model dependency. Correlations with the adopted metallicity result in a robust helium enrichment law, with Delta Y/Delta Z close to 1.2 We estimate the age of the Hyades to be 0.9 +/- 0.1 (stat) +/- 0.1 (sys) Gyr, which is in slight tension with recent age estimates based on the cluster white dwarfs. The precision of the age estimate can be much improved via asteroseismic investigations of the other Hyades giants and by future improvements to the Gaia parallax for bright stars.

KW - binaries: eclipsing

KW - open clusters and associations: individual: Hyades

KW - stars: oscillations

KW - stars: abundances

KW - stars: individual: HD27130

KW - stars: individual: E Tau

KW - ASTEROSEISMIC MASS

KW - RADIAL-VELOCITY

KW - OPEN CLUSTERS

KW - NGC 6791

KW - DISTANCE

KW - SOLAR

KW - STARS

KW - MODELS

KW - EVOLUTION

KW - SPECTRA

U2 - 10.1051/0004-6361/202039250

DO - 10.1051/0004-6361/202039250

M3 - Journal article

VL - 645

JO - Astronomy & Astrophysics

JF - Astronomy & Astrophysics

SN - 0004-6361

M1 - 25

ER -