Asteroseismology and interferometry of the red giant star Ophiuchi
@article{Mazumdar2009AsteroseismologyAI, title={Asteroseismology and interferometry of the red giant star Ophiuchi}, author={A. Mazumdar and A. M{\'e}rand and Pierre. Demarque and Pierre Kervella and Caroline Barban and Frédéric Baudin and Vincent Coud{\'e} du Foresto and Christopher D. Farrington and P. J. Goldfinger and Marie Jo Goupil and Eric Josselin and Rainer Kuschnig and Harold A. Mcalister and Jaymie Matthews and Stephen T. Ridgway and Judit Sturmann and Laszlo Sturmann and Theo A. ten Brummelaar and Neal J. Turner}, journal={Astronomy and Astrophysics}, year={2009}, volume={503}, pages={521-531} }
The GIII red giant starOph has been found to exhibit several modes of oscillation by the MOST mission. We interpret the observed frequencies of oscillation in terms of theoretical radial p-mode frequencies of stellar models. Evolutionary models of this star, in both shell H-burning and core He-burning phases of evolution, are constructed using as constraints a combination of measurements from classical ground-based observations (for luminosity, temperature, and chemical composition) and seismic…
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References
SHOWING 1-10 OF 46 REFERENCES
Detection of solar-like oscillations in the red giant star $\epsilon$ Ophiuchi by MOST spacebased photometry
- Physics
- 2007
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 of…
Discovery of solar-like oscillations in the red giant $\varepsilon$ Ophiuchi
- Physics
- 2006
We present the discovery of solar-like oscillations in time-series of the G9.5 red giant \varepsilon Ophiuchi. The data were obtained with the CORALIE spectrograph at the 1.2 m Swiss telescope in La…
Oscillations of α UMa and other red giants
- Physics
- 2001
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 was…
The development of the red giant branch. I - Theoretical evolutionary sequences
- Physics
- 1989
A grid of 100 evolutionary sequences extending from the zero-age main sequence to the onset of helium burning has been computed for stellar masses between 1.4 and 3.4 solar masses, helium abundances…
MOST found evidence for solar-type oscillations in the K2 giant star HD 20884
- Physics
- 2008
Abstract We found evidence for radial p-modes and nonradial mixed modes in the oscilla-tion spectrum of the K giant HD20884 based on 20.6 days of nearly…
The MOST Asteroseismology Mission: Ultraprecise Photometry from Space
- Physics
- 2003
ABSTRACT The Microvariablity and Oscillations of Stars (MOST) mission is a low‐cost microsatellite designed to detect low‐degree acoustic oscillations (periods of minutes) with micromagnitude…
Nonradial p-modes in the G9.5 giant $\epsilon$ Ophiuchi? Pulsation model fits to MOST photometry
- Physics, Geology
- 2008
The G9.5 giant ∈ Oph shows evidence of radial p-mode pulsations in both radial velocity and luminosity. We re-examine the observed frequencies in the photometry and radial velocities and find a best…
Detection of Solar-like Oscillations in the G7 Giant Star xi Hya
- Physics
- 2002
We report the firm discovery of solar-like oscillations in a giant star. We monitored the star ξ Hya (G7III) continu- ously during one month with the CORALIE spectrograph attached to the 1.2 m Swiss…
The evolution of horizontal-branch stars: Theoretical sequences
- Physics
- 1990
A new grid of standard (i.e., solar CNO/Fe, no core rotation, and including semiconvection) horizontal-branch evolutionary sequences are presented which extend the grid of Sweigart both by including…
The radii of the nearby K5V and K7V stars 61 Cygni A & B. CHARA/FLUOR interferometry and CESAM2k modeling
- Physics, Geology
- 2008
Context: The main sequence binary star 61 Cyg (K5V+K7V) is our nearest stellar neighbour in the northern hemisphere. This proximity makes it a particularly well suited system for very high accuracy…