A test of the asteroseismic νmax scaling relation for solar-like oscillations in main-sequence and subgiant stars

H. R. Coelho, W. J. Chaplin, S. Basu, A. Serenelli, A. Miglio, D. R. Reese

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

Large-scale analyses of stellar samples comprised of cool, solar-like oscillators now commonly utilize the so-called asteroseismic scaling relations to estimate fundamental stellar properties. In this paper, we present a test of the scaling relation for the global asteroseismic parameter νmax, the frequency at which a solar-like oscillator presents its strongest observed pulsation amplitude. The classic relation assumes that this characteristic frequency scales with a particular combination of surface gravity and effective temperature that also describes the dependence of the cut-off frequency for acoustic waves in an isothermal atmosphere, i.e. νmax∝gT−1/2eff⁠. We test how well the oscillations of cool main-sequence and subgiant stars adhere to this relation, using a sample of asteroseismic targets observed by the NASA Kepler Mission. Our results, which come from a grid-based analysis, rule out departures from the classic gT−1/2eff scaling dependence at the level of ≃1.5 per cent over the full ≃ 1560 K range in Teff that we tested. There is some uncertainty over the absolute calibration of the scaling. However, any variation with Teff is evidently small, with limits similar to those above.
Original languageEnglish
Pages (from-to)3011-3020
Number of pages10
JournalRoyal Astronomical Society. Monthly Notices
Volume451
Issue number3
Early online date17 Jun 2015
DOIs
Publication statusPublished - 11 Aug 2015

Keywords

  • asteroseismology
  • methods: data analysis

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