Acoustic glitches in solar-type stars from Kepler

Research output: Contribution to journalArticlepeer-review

Authors

  • A. Mazumdar
  • M.J.P.F.G. Monteiro
  • M.S. Cunha
  • J. Ballot
  • H.M. Antia
  • S. Basu
  • G. Houdek
  • V. Silva Aguirre
  • J. Christensen-Dalsgaard
  • S. Mathur
  • R.A. García
  • T.S. Metcalfe

Colleges, School and Institutes

External organisations

  • TIFR
  • Universidade do Porto
  • Institut de Recherche en Astrophysique et Planétologie
  • IRAP
  • Tata Institute of Fundamental Research
  • Yale University
  • Aarhus Universitet
  • University of Vienna
  • Max-Planck-Institut für Astrophysik
  • NCAR
  • IRFU/SAp, Centre de Saclay
  • Space Science Institute

Abstract

We report the measurement of the acoustic locations of layers of sharp variation in sound speed in the interiors of 19 solar-type stars observed by the Kepler mission. The oscillatory signal in the frequencies arising due to the acoustic glitches at the base of the convection zone and the second helium ionisation zone was utilised to determine their location by four independent methods. Despite the significantly different methods of analysis, remarkable agreement was found between the results of these four methods. Further, the extracted locations of these layers were found to be consistent with representative models of the stars.

Details

Original languageEnglish
Pages (from-to)1040-1043
Number of pages4
JournalAstronomische Nachrichten
Volume333
Issue number10
Publication statusPublished - 1 Dec 2012