First Results From The Hertzsprung Song Telescope: Asteroseismology Of The G5 Subgiant Star {\Mu}Her

F. Grundahl; M. Fredslund Andersen; J. Christensen-Dalsgaard; V. Antoci; H. Kjeldsen; R. Handberg; G. Houdek; T. R. Bedding; P. L. Pallé; J. Jessen-Hansen; V. Silva Aguirre; T. R. White; S. Frandsen; S. Albrecht; M. I. Andersen; T. Arentoft; K. Brogaard; W. J. Chaplin; K. Harpsøe; U. G. Jørgensen; I. Karovicova; C. Karoff; P. Kjærgaard Rasmussen; M. N. Lund; M. Sloth Lundkvist; J. Skottfelt; A. Norup Sørensen; R. Tronsgaard; E. Weiss

doi:10.3847/1538-4357/836/1/142

First Results From The Hertzsprung Song Telescope: Asteroseismology Of The G5 Subgiant Star {\Mu}Her

F. Grundahl, M. Fredslund Andersen, J. Christensen-Dalsgaard, V. Antoci, H. Kjeldsen, R. Handberg, G. Houdek, T. R. Bedding, P. L. Pallé, J. Jessen-Hansen, V. Silva Aguirre, T. R. White, S. Frandsen, S. Albrecht, M. I. Andersen, T. Arentoft, K. Brogaard, W. J. Chaplin, K. Harpsøe, U. G. JørgensenI. Karovicova, C. Karoff, P. Kjærgaard Rasmussen, M. N. Lund, M. Sloth Lundkvist, J. Skottfelt, A. Norup Sørensen, R. Tronsgaard, E. Weiss

Physics and Astronomy

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Abstract

We report the first asteroseismic results obtained with the Hertzsprung SONG Telescope from an extensive high-precision radial-velocity observing campaign of the subgiant muHerculis. The data set was collected during 215 nights in 2014 and 2015. We detected a total of 49 oscillation modes with l values from 0 to 3, including some l = 1 mixed modes. Based on the rotational splitting observed in l = 1 modes, we determine a rotational period of 52 days and a stellar inclination angle of 63 degrees. The parameters obtained through modeling of the observed oscillation frequencies agree very well with independent observations and imply a stellar mass between 1.11 and 1.15M_sun and an age of 7.8+/-0.4 Gyr. Furthermore, the high-quality data allowed us to determine the acoustic depths of the He II ionization layer and the base of the convection zone.

Original language	English
Article number	142
Journal	The Astrophysical Journal
Volume	836
Issue number	1
DOIs	https://doi.org/10.3847/1538-4357/836/1/142
Publication status	Published - 14 Feb 2017

Bibliographical note

17 pages, 15 figures. Accepted for publication in ApJ

Keywords

astro-ph.SR

Access to Document

10.3847/1538-4357/836/1/142

Grundahl_et_al_First_results_from_the_hertzsprung_Astrophysical_Journal_2017
Checked for eligibility: 18/07/2019 This document appears in its final form in Astrophysical Journal, copyright © 2019. The American Astronomical Society. All rights reserved. The final Version of Record can be found at: https://iopscience.iop.org/article/10.3847/1538-4357/836/1/142 https://doi.org/10.3847/1538-4357/836/1/142
Final published version, 1.66 MBLicence: None: All rights reserved

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Grundahl, F., Andersen, M. F., Christensen-Dalsgaard, J., Antoci, V., Kjeldsen, H., Handberg, R., Houdek, G., Bedding, T. R., Pallé, P. L., Jessen-Hansen, J., Aguirre, V. S., White, T. R., Frandsen, S., Albrecht, S., Andersen, M. I., Arentoft, T., Brogaard, K., Chaplin, W. J., Harpsøe, K., ... Weiss, E. (2017). First Results From The Hertzsprung Song Telescope: Asteroseismology Of The G5 Subgiant Star {\Mu}Her. The Astrophysical Journal, 836(1), Article 142. https://doi.org/10.3847/1538-4357/836/1/142

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title = "First Results From The Hertzsprung Song Telescope: Asteroseismology Of The G5 Subgiant Star {\Mu}Her",

abstract = "We report the first asteroseismic results obtained with the Hertzsprung SONG Telescope from an extensive high-precision radial-velocity observing campaign of the subgiant muHerculis. The data set was collected during 215 nights in 2014 and 2015. We detected a total of 49 oscillation modes with l values from 0 to 3, including some l = 1 mixed modes. Based on the rotational splitting observed in l = 1 modes, we determine a rotational period of 52 days and a stellar inclination angle of 63 degrees. The parameters obtained through modeling of the observed oscillation frequencies agree very well with independent observations and imply a stellar mass between 1.11 and 1.15M_sun and an age of 7.8+/-0.4 Gyr. Furthermore, the high-quality data allowed us to determine the acoustic depths of the He II ionization layer and the base of the convection zone. ",

keywords = "astro-ph.SR",

author = "F. Grundahl and Andersen, {M. Fredslund} and J. Christensen-Dalsgaard and V. Antoci and H. Kjeldsen and R. Handberg and G. Houdek and Bedding, {T. R.} and Pall{\'e}, {P. L.} and J. Jessen-Hansen and Aguirre, {V. Silva} and White, {T. R.} and S. Frandsen and S. Albrecht and Andersen, {M. I.} and T. Arentoft and K. Brogaard and Chaplin, {W. J.} and K. Harps{\o}e and J{\o}rgensen, {U. G.} and I. Karovicova and C. Karoff and Rasmussen, {P. Kj{\ae}rgaard} and Lund, {M. N.} and Lundkvist, {M. Sloth} and J. Skottfelt and S{\o}rensen, {A. Norup} and R. Tronsgaard and E. Weiss",

note = "17 pages, 15 figures. Accepted for publication in ApJ",

year = "2017",

month = feb,

day = "14",

doi = "10.3847/1538-4357/836/1/142",

language = "English",

volume = "836",

journal = "The Astrophysical Journal",

issn = "0004-637X",

publisher = "Institute of Physics Publishing Ltd",

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Grundahl, F, Andersen, MF, Christensen-Dalsgaard, J, Antoci, V, Kjeldsen, H, Handberg, R, Houdek, G, Bedding, TR, Pallé, PL, Jessen-Hansen, J, Aguirre, VS, White, TR, Frandsen, S, Albrecht, S, Andersen, MI, Arentoft, T, Brogaard, K, Chaplin, WJ, Harpsøe, K, Jørgensen, UG, Karovicova, I, Karoff, C, Rasmussen, PK, Lund, MN, Lundkvist, MS, Skottfelt, J, Sørensen, AN, Tronsgaard, R & Weiss, E 2017, 'First Results From The Hertzsprung Song Telescope: Asteroseismology Of The G5 Subgiant Star {\Mu}Her', The Astrophysical Journal, vol. 836, no. 1, 142. https://doi.org/10.3847/1538-4357/836/1/142

TY - JOUR

T1 - First Results From The Hertzsprung Song Telescope

T2 - Asteroseismology Of The G5 Subgiant Star {\Mu}Her

AU - Grundahl, F.

AU - Andersen, M. Fredslund

AU - Christensen-Dalsgaard, J.

AU - Antoci, V.

AU - Kjeldsen, H.

AU - Handberg, R.

AU - Houdek, G.

AU - Bedding, T. R.

AU - Pallé, P. L.

AU - Jessen-Hansen, J.

AU - Aguirre, V. Silva

AU - White, T. R.

AU - Frandsen, S.

AU - Albrecht, S.

AU - Andersen, M. I.

AU - Arentoft, T.

AU - Brogaard, K.

AU - Chaplin, W. J.

AU - Harpsøe, K.

AU - Jørgensen, U. G.

AU - Karovicova, I.

AU - Karoff, C.

AU - Rasmussen, P. Kjærgaard

AU - Lund, M. N.

AU - Lundkvist, M. Sloth

AU - Skottfelt, J.

AU - Sørensen, A. Norup

AU - Tronsgaard, R.

AU - Weiss, E.

N1 - 17 pages, 15 figures. Accepted for publication in ApJ

PY - 2017/2/14

Y1 - 2017/2/14

N2 - We report the first asteroseismic results obtained with the Hertzsprung SONG Telescope from an extensive high-precision radial-velocity observing campaign of the subgiant muHerculis. The data set was collected during 215 nights in 2014 and 2015. We detected a total of 49 oscillation modes with l values from 0 to 3, including some l = 1 mixed modes. Based on the rotational splitting observed in l = 1 modes, we determine a rotational period of 52 days and a stellar inclination angle of 63 degrees. The parameters obtained through modeling of the observed oscillation frequencies agree very well with independent observations and imply a stellar mass between 1.11 and 1.15M_sun and an age of 7.8+/-0.4 Gyr. Furthermore, the high-quality data allowed us to determine the acoustic depths of the He II ionization layer and the base of the convection zone.

AB - We report the first asteroseismic results obtained with the Hertzsprung SONG Telescope from an extensive high-precision radial-velocity observing campaign of the subgiant muHerculis. The data set was collected during 215 nights in 2014 and 2015. We detected a total of 49 oscillation modes with l values from 0 to 3, including some l = 1 mixed modes. Based on the rotational splitting observed in l = 1 modes, we determine a rotational period of 52 days and a stellar inclination angle of 63 degrees. The parameters obtained through modeling of the observed oscillation frequencies agree very well with independent observations and imply a stellar mass between 1.11 and 1.15M_sun and an age of 7.8+/-0.4 Gyr. Furthermore, the high-quality data allowed us to determine the acoustic depths of the He II ionization layer and the base of the convection zone.

KW - astro-ph.SR

U2 - 10.3847/1538-4357/836/1/142

DO - 10.3847/1538-4357/836/1/142

M3 - Article

SN - 0004-637X

VL - 836

JO - The Astrophysical Journal

JF - The Astrophysical Journal

IS - 1

M1 - 142

ER -

First Results From The Hertzsprung Song Telescope: Asteroseismology Of The G5 Subgiant Star {\Mu}Her

Abstract

Bibliographical note

Keywords

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