# ON THE INTERPRETATION OF ECHELLE DIAGRAMS FOR SOLAR-LIKE OSCILLATIONS EFFECT OF CENTRIFUGAL DISTORTION

@article{Suarez2010ONTI, title={ON THE INTERPRETATION OF ECHELLE DIAGRAMS FOR SOLAR-LIKE OSCILLATIONS EFFECT OF CENTRIFUGAL DISTORTION}, author={Juan Carlos Su'arez and Marie Jo Goupil and D.R.Reese and R'eza Samadi and François Ligni{\`e}res and M. Rieutord and Jeremie Lochard}, journal={The Astrophysical Journal}, year={2010}, volume={721}, pages={537-546} }

This work aims at determining the impact of slow to moderate rotation on the regular patterns often present in solar-like oscillation spectra, i.e., the frequency spacings. We focus on the well-known asteroseismic diagnostic echelle diagrams, examining how rotation may modify the estimates of the large and small spacings, as well as the identification of modes. We illustrate the work with a real case: the solar-like star ?Bootis. We study a main-sequence 1.3 M ? star as a typical case. The… Expand

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#### References

SHOWING 1-10 OF 41 REFERENCES

Acoustic oscillations of rapidly rotating polytropic stars. I. Effects of the centrifugal distortion

- Physics
- 2006

Aims. A new non-perturbative method to compute accurate oscillation modes in rapidly rotating stars is presented. Methods. The effect of the centrifugal force is fully taken into account while the… Expand

Normal Modes of Oscillation for Rotating Stars. V. A New Numerical Method for Computing Nonradial Eigenfunctions

- Physics
- 1998

This paper is a progress report on my efforts to develop a robust numerical scheme for computing eigenmodes of arbitrary order at arbitrary rotation rates. The slowly pulsating B stars and the… Expand

Asteroseismic Signatures of Small Convective Cores

- Physics
- 2007

We present an analytical study of the effect of small convective cores on the oscillations of solar-like pulsators. Based on an asymptotic analysis of the wave equation near the center of the star,… Expand

Photometric amplitudes and phases of nonradial oscillation in rotating stars

- Physics
- 2002

Effects of rotational mode coupling on photometric parameters of stellar oscillations are studied. At moderate rotation rates, a strong coupling between modes of spherical harmonic degree, $\ell$,… Expand

Acoustic oscillations of rapidly rotating polytropic stars. II. Effects of the Coriolis and centrifu

- Physics
- 2006

Context. With the launch of space missions devoted to asteroseismology (like COROT), the scientific community will soon have accurate measurements of pulsation frequencies in many rapidly rotating… Expand

Asteroseismic signatures of helium gradients in late F-type stars

- Physics
- 2006

Context. Element diffusion is expected to occur in all kinds of stars: according to the relative effect of gravitation and radiative acceleration, they can fall or be pushed up in the atmospheres.… Expand

The ratio of small to large separations of acoustic oscillations as a diagnostic of the interior of solar-like stars

- Physics
- 2003

By considering stellar models with the same interior structure but different outer layers we demonstrate that the ratio of the small to large separations of acoustic oscillations in solar-like stars… Expand

Asteroseismic tests of element diffusion in solar type stars

- Physics
- 2005

Following the success of helioseismology, asteroseismology is now becoming a fundamental tool for penetrating the secrets of the internal structure of stars. In preparation of this new era in stellar… Expand

SEISMOLOGY OF β CEPHEI STARS: DIFFERENTIALLY ROTATING MODELS FOR INTERPRETING THE OSCILLATION SPECTRUM OF ν ERIDANI

- Physics
- 2009

A method for the asteroseismic analysis of β Cephei stars is presented and applied to the star ν Eridani. The method is based on the analysis of rotational splittings and their asymmetries using… Expand

Space- and Ground-based Pulsation Data of η Bootis Explained with Stellar Models Including Turbulence

- Physics
- 2006

The space telescope MOSTis now providing us with extremely accurate low-frequency p-mode oscillation data for the starBoo. We demonstrate in this paper that these data, when combined with… Expand