Seismic diagnostics of red giants: first comparison with stellar models

@article{Montalban2010SeismicDO,
  title={Seismic diagnostics of red giants: first comparison with stellar models},
  author={Josefina Montalb'an and Andrea Miglio and Arlette Noels and Richard Scuflaire and Paolo Ventura},
  journal={The Astrophysical Journal},
  year={2010},
  volume={721}
}
The clear detection with CoRoT and KEPLER of radial and non-radial solar-like oscillations in many red giants paves the way for seismic inferences on the structure of such stars. We present an overview of the properties of the adiabatic frequencies and frequency separations of radial and non-radial oscillation modes for an extended grid of models. We highlight how their detection allows a deeper insight into the internal structure and evolutionary state of red giants. In particular, we find… Expand

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References

SHOWING 1-10 OF 24 REFERENCES
Probing populations of red giants in the galactic disk with CoRoT
The detection with CoRoT of solar-like oscillations in nearly 800 red giants in the first 150-days long observational run paves the way for detailed studies of populations of galactic-disk redExpand
Red-giant seismic properties analyzed with CoRoT
Context. The CoRoT 5-month long observation runs provide us with the opportunity to analyze a large variety of red-giant stars and derive their fundamental parameters from their asteroseismicExpand
Solar-like Oscillations in Low-luminosity Red Giants: First Results from Kepler
We have measured solar-like oscillations in red giants using time-series photometry from the first 34 days of science operations of the Kepler Mission. The light curves, obtained with 30 minuteExpand
Theoretical amplitudes and lifetimes of non-radial solar-like oscillations in red giants
Context. Solar-like oscillations have been observed in numerous red giants from ground and from space. An important question arises: could we expect to detect non-radial modes probing the internalExpand
Non-radial oscillation modes with long lifetimes in giant stars
TLDR
The presence of radial and non-radial oscillations in more than 300 giant stars is reported, finding giant stars with equally spaced frequency peaks in the Fourier spectrum of the time series, as well as giants for which the spectrum seems to be more complex. Expand
Non-radial oscillations in the red giant HR 7349 measured by CoRoT
Context. Convection in red giant stars excites resonant acoustic waves whose frequencies depend on the sound speed inside the star, which in turn depends on the properties of the stellar interior.Expand
Oscillations of α UMa and other red giants
There is growing observational evidence that the variability of red giants could be caused by self-excitation of global modes of oscillation. The most recent evidence of such oscillations wasExpand
Characteristics of solar-like oscillations in red giants observed in the CoRoT exoplanet field
Observations during the first long run (~150 days) in the exo-planet field of CoRoT increase the number of G-K giant stars for which solar-like oscillations are observed by a factor of 100. ThisExpand
Physics of solar-like oscillations
The physics of solar and stellar oscillations determines their observable properties: frequencies, amplitudes, lifetimes, line asymmetries and phase relations. In the solar case these quantities haveExpand
Detection of solar-like oscillations in the red giant star $\epsilon$ Ophiuchi by MOST spacebased photometry
Context. Solar-like oscillations have been discovered in a few red giants, including ϵ  Oph, through spectroscopy. Acoustic modes around 60  μ Hz were clearly seen in this star, but daily aliasing ofExpand
...
1
2
3
...