Seismic analysis of HD43587Aa, a solar-like oscillator in a multiple system

Research output: Contribution to journalArticlepeer-review


  • P. Boumier
  • T. Appourchaux
  • Y. Lebreton
  • P. Gaulme
  • R. A. Garcia
  • C. Regulo
  • David Salabert
  • T. Stahn
  • Yvonne Elsworth
  • L. Gizon
  • M. Hall
  • S. Mathur
  • E. Michel
  • T. Morel
  • B. Mosser
  • E. Poretti
  • M. Rainer
  • I. Roxburgh
  • J. -D. do Nascimento Jr
  • R. Samadi
  • M. Auvergne
  • S. Chaintreuil
  • A. Baglin
  • C. Catala

Colleges, School and Institutes


Context: The object HD 43587Aa is a G0V star observed during the 145-day LRa03 run of the COnvection, ROtation and planetary Transits space mission (CoRoT), for which complementary High Accuracy Radial velocity Planet Searcher (HARPS) spectra with S/N>300 were also obtained. Its visual magnitude is 5.71, and its effective temperature is close to 5950 K. It has a known companion in a highly eccentric orbit and is also coupled with two more distant companions. Aims: We undertake a preliminary investigation of the internal structure of HD 43587Aa. Methods: We carried out a seismic analysis of the star, using maximum likelihood estimators and Markov Chain Monte Carlo methods. Results: We established the first table of the eigenmode frequencies, widths, and heights for HD 43587Aa. The star appears to have a mass and a radius slightly larger than the Sun, and is slightly older (5.6 Gyr). Two scenarios are suggested for the geometry of the star: either its inclination angle is very low, or the rotation velocity of the star is very low. Conclusions: A more detailed study of the rotation and of the magnetic and chromospheric activity for this star is needed, and will be the subject of a further study. New high resolution spectrometric observations should be performed for at least several months in duration.


Original languageEnglish
Article numberA34
Number of pages10
JournalAstronomy and Astrophysics
Publication statusPublished - 1 Apr 2014


  • astro-ph.SR, asteroseismology, stars: individual: HD 43587Aa, binaries: general, stars: solar-type, methods: data analysis