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… 
Asteroseismology of red giants from the first four months of Kepler data: Fundamental stellar parameters
Context. Clear power excess in a frequency range typical for solar-type oscillations in red giants has been detected in more than 1000 stars, which have been observed during the first 138 days of the
Interferometric radius and limb darkening of the asteroseismic red giant η Serpentis with the CHARA Array
Context. The radius of a star is a very important constraint to evolutionary models, particularly when combined with asteroseismology. Diameters can now be measured interferometrically with great
Atmospheric parameters and chemical properties of red giants in the CoRoT asteroseismology fields
A precise characterisation of the red giants in the seismology fields of the CoRoT satellite is a prerequisite for further in-depth seismic modelling. High-resolution FEROS and HARPS spectra were
Fundamental properties of stars using asteroseismology from Kepler and CoRoT and interferometry from the CHARA Array
We present results of a long-baseline interferometry campaign using the PAVO beam combiner at the CHARA Array to measure the angular sizes of five main-sequence stars, one subgiant and four red giant
Asteroseismic study of the red giant Ophiuchi
We test the possible evolutionary tracks of stars with various masses (1.8 M� , 1.9 M� , 2.0 M� , 2.1 M� , 2.2 M� ) and metallicities Z (0.008, 0.010, 0.012), including both models with and without
Modelling a high-mass red giant observed by CoRoT
The G6 giant HR\,2582 (HD\,50890) was observed by CoRoT for approximately 55 days. Mode frequencies are extracted from the observed Fourier spectrum of the light curve. Numerical stellar models are
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 asteroseismic
Asteroseismology of Red Giants as a Tool for Studying Stellar Populations: First Steps
The detection of solar-like oscillations in G and K giants with the CoRoT and Keplerspace-based satellites allows robust constraints to be set on the mass and radius of such stars. The availability
Predicting stellar angular diameters from V, I C , H and K photometry
Determining the physical properties of microlensing events depends on having accurate angular sizes of the source star. Using long-baseline optical interferometry we are able to measure the angular
Energetic study of solar-like oscillations in red giants
Observations of solar-like oscillations by CoRoT and Kepler space-borne telescopes, have opened new opportunities for the energetic modelling of these oscillations. In particular, oscillations
...
...

References

SHOWING 1-10 OF 46 REFERENCES
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 of
Discovery of solar-like oscillations in the red giant $\varepsilon$ Ophiuchi
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
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
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
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
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
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
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
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
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
...
...