pith. sign in

arxiv: 1701.03365 · v1 · pith:AGY36INWnew · submitted 2017-01-12 · 🌌 astro-ph.SR

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
show 21 more authors
P. L. Pall\'e J. Jessen-Hansen V. Silva Aguirre T. R. White S. Frandsen S. Albrecht M. I. Andersen T. Arentoft K. Brogaard W. J. Chaplin K. Harps{\o}e U.G. J{\o}rgensen I. Karovicova C. Karoff P. Kj{\ae}rgaard Rasmussen M. N. Lund M. Sloth Lundkvist J. Skottfelt A. Norup S{\o}rensen R. Tronsgaard E. Weiss
This is my paper
classification 🌌 astro-ph.SR
keywords modesdatadeterminefirsthertzsprungobservedobtainedoscillation
0
0 comments X
read the original 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.

This paper has not been read by Pith yet.

discussion (0)

Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.

Forward citations

Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Gaia Exoplanet Orbits, Demographics, and Evolution Survey (GEODES): Characteristics of Three Long-Period Companions Accelerating their Host Stars

    astro-ph.EP 2026-05 conditional novelty 5.0

    Three accelerating stars yield one stellar companion at 166 AU, one 45 Jupiter-mass object at ~18 AU, and one 9.5 Jupiter-mass object at 6.4 AU that is 65% likely to be a planet.