Amplitudes of solar-like oscillations: constraints from red giants in open clusters observed by Kepler

Abstract

Scaling relations that link asteroseismic quantities to global stellar properties are important for gaining understanding of the intricate physics that underpins stellar pulsation. The common notion that all stars in an open cluster have essentially the same distance, age, and initial composition, implies that the stellar parameters can be measured to much higher precision than what is usually achievable for single stars. This makes clusters ideal for exploring the relation between the mode amplitude of solar-like oscillations and the global stellar properties. We have analyzed data obtained with NASA's Kepler space telescope to study solar-like oscillations in 100 red giant stars located in either of the three open clusters, NGC 6791, NGC 6819, and NGC 6811. By fitting the measured amplitudes to predictions from simple scaling relations that depend on luminosity, mass, and effective temperature, we find that the data cannot be described by any power of the luminosity-to-mass ratio as previously assumed. As a result we provide a new improved empirical relation which treats luminosity and mass separately. This relation turns out to also work remarkably well for main-sequence and subgiant stars. In addition, the measured amplitudes reveal the potential presence of a number of previously unknown unresolved binaries in the red clump in NGC 6791 and NGC 6819, pointing to an interesting new application for asteroseismology as a probe into the formation history of open clusters.

6 pages, 4 figures, accepted by ApJL

References in corpus (16)

• Gravity modes as a way to distinguish between hydrogen- and helium-burning red giant stars
• ADIPLS -- the Aarhus adiabatic oscillation package
• Preparation of Kepler lightcurves for asteroseismic analyses
• ASTEC -- the Aarhus STellar Evolution Code
• The underlying physical meaning of the ${\nu }_{\max }-{\nu }_{\mathrm{c}}$ relation
• A multi-site campaign to measure solar-like oscillations in Procyon. I. Observations, Data Reduction and Slow Variations
• The amplitude of solar oscillations using stellar techniques
• Amplitudes of solar-like oscillations: a new scaling relation
• Excitation of solar-like oscillations across the HR diagram
• Intrinsic photometric characterisation of stellar oscillations and granulation. Solar reference values and CoRoT response functions
• Visibilities and bolometric corrections for stellar oscillation modes observed by Kepler
• Asteroseismic inferences on red giants in open clusters NGC 6791, NGC 6819 and NGC 6811 using Kepler
• Multisite campaign on the open cluster M67. II. Evidence for solar-like oscillations in red giant stars
• Solar-like oscillations and activity in Procyon: A comparison of the 2007 MOST and ground-based radial velocity campaigns
• AsteroFLAG: first results from hare-and-hounds Exercise 1
• Seismic inference of differential rotation in Procyon A

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• Asteroseismology of Pulsating Stars
• Seismic constraints on the internal structure of evolved stars: From high-luminosity RGB to AGB stars
• The Bayesian Asteroseismology data Modeling pipeline and its application to $K2$ data
• Fundamental properties of solar-like oscillating stars from frequencies of minimum $\Delta \nu$: I. Model computations for solar composition
• Magnetic activity of red giants: correlation between the amplitude of solar-like oscillations and chromospheric indicators
• GAUFRE: a tool for an automated determination of atmospheric parameters from spectroscopy
• Robo-AO Kepler Asteroseismic Survey. I. Adaptive optics imaging of 99 asteroseismic Kepler dwarfs and subgiants
• Testing the wavelength dependence of oscillations and granulation in red giants using Kepler and TESS
• KIC 2568888: To be or not to be a binary
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