Solar-like oscillations in the G8 V star τ Ceti
T. C. Teixeira,T. C. Teixeira,Hans Kjeldsen,Timothy R. Bedding,François Bouchy,Joergen Christensen-Dalsgaard,Margarida S. Cunha,T. H. Dall,S. Frandsen,Christoffer Karoff,Mário J. P. F. G. Monteiro,Frank P. Pijpers,Frank P. Pijpers +12 more
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In this article, the authors used HARPS to measure oscillations in the low-mass star τ Cet. Although the data were compromised by instrumental noise, they were able to extract the main features of the oscillations.Abstract:
We used HARPS to measure oscillations in the low-mass star τ Cet. Although the data were compromised by instrumental noise, we have been able to extract the main features of the oscillations. We found τ Cet to oscillate with an amplitude that is about half that of the Sun, and with a mode lifetime that is slightly shorter than solar. The large frequency separation is 169 μHz, and we have identified modes with degrees 0, 1, 2, and 3. We used the frequencies to estimate the mean density of the star to an accuracy of 0.45% which, combined with the interferometric radius, gives a mass of 0.783 ± 0.012 M� (1.6%).read more
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Accurate fundamental parameters for 23 bright solar-type stars
Hans Bruntt,Timothy R. Bedding,P.-O. Quirion,P.-O. Quirion,G. Lo Curto,Fabien Carrier,Barry Smalley,T. H. Dall,T. Arentoft,Michael Bazot,R. P. Butler +10 more
TL;DR: In this paper, the authors combine results from interferometry, asteroseismology and spectroscopy to determine accurate fundamental parameters of 23 bright solar-type stars, from spectral type F5 to K2 and luminosity classes III-V.
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Gaia FGK benchmark stars: Effective temperatures and surface gravities
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Planetary detection limits taking into account stellar noise - I. Observational strategies to reduce stellar oscillation and granulation effects
Xavier Dumusque,Xavier Dumusque,Stéphane Udry,Christophe Lovis,Nuno C. Santos,Mário J. P. F. G. Monteiro +5 more
TL;DR: In this paper, the authors address the important role played by observational strategies in averaging out the radial velocity signature of stellar noise and derive the planetary mass detection limits expected in the presence of stellar noises.
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Solar-like Oscillations in Low-luminosity Red Giants: First Results from Kepler
Timothy R. Bedding,Daniel Huber,Dennis Stello,Yvonne Elsworth,Saskia Hekker,Thomas Kallinger,Thomas Kallinger,Savita Mathur,Benoit Mosser,H. L. Preston,Jérôme Ballot,C. Barban,Anne-Marie Broomhall,Derek Buzasi,William J. Chaplin,Rafael A. García,Michael Gruberbauer,Steven J. Hale,J. De Ridder,Søren Frandsen,William J. Borucki,Timothy Brown,Jørgen Christensen-Dalsgaard,Ronald L. Gilliland,Jon M. Jenkins,Hans Kjeldsen,David G. Koch,Kevin Belkacem,Lars Bildsten,Hans Bruntt,Hans Bruntt,Tiago L. Campante,Tiago L. Campante,S. Deheuvels,Aliz Derekas,Aliz Derekas,Marc-Antoine Dupret,Marie-Jo Goupil,Artie P. Hatzes,Günter Houdek,Michael J. Ireland,Chen Jiang,Christoffer Karoff,László L. Kiss,László L. Kiss,Yveline Lebreton,Andrea Miglio,Josefina Montalbán,Alfred F. Noels,Ian W. Roxburgh,Vinothini Sangaralingam,Ian R. Stevens,M. D. Suran,N. J. Tarrant,Achim Weiss +54 more
TL;DR: In this paper, the authors measured solar-like oscillations in red giants using time-series photometry from the first 34 days of science operations of the Kepler Mission and found a strong correlation between the large separation of the oscillations and the frequency of maximum power (νmax).
Journal ArticleDOI
Calculating asteroseismic diagrams for solar-like oscillations
Timothy R. White,Timothy R. White,Timothy R. Bedding,Dennis Stello,Jørgen Christensen-Dalsgaard,Daniel Huber,Hans Kjeldsen +6 more
TL;DR: In this paper, the scaling relation between the large frequency separation, {Delta}{nu}, and mean stellar density is investigated, and model evolutionary tracks for several asteroseismic diagrams are presented.
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