Interferometry and asteroseismology: The radius of τ Cet
Frank P. Pijpers,T. C. Teixeira,T. C. Teixeira,Paulo J. V. Garcia,Paulo J. V. Garcia,Margarida S. Cunha,Mário J. P. F. G. Monteiro,Joergen Christensen-Dalsgaard +7 more
TLDR
In this article, the radius of the nearby star τ Cet has been determined from interferometry using the VINCI instrument on VLTI using the siderostats.Abstract:
We have determined from interferometry the radius of the nearby star τ Cet, using recent observations with the VINCI instrument on VLTI using the siderostats. The limb-darkened disk diameter is determined, with an unprecedented internal precision of 0.5%, to be 1.971 ± 0.009(int.) ± 0.05(ext.) mas, corresponding to a physical radius of 0.773 ± 0.004(int.) ± 0.02(ext.) R� . With this determination τ Cet becomes a prime target for asteroseismic campaigns to determine its internal structure, and thereby test stellar evolution theory. We discuss implications for asteroseismology and present predictions for oscillation properties.read more
Citations
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Journal ArticleDOI
Asteroseismology and interferometry
Margarida S. Cunha,Conny Aerts,Conny Aerts,Jørgen Christensen-Dalsgaard,A. Baglin,Lionel Bigot,Timothy M. Brown,Claude Catala,O. L. Creevey,A. Domiciano de Souza,Patrick Eggenberger,Paulo J. V. Garcia,Frank Grundahl,Pierre Kervella,D. W. Kurtz,P. Mathias,Andrea Miglio,Mário J. P. F. G. Monteiro,Guy Perrin,Frank P. Pijpers,Dimitri Pourbaix,Andreas Quirrenbach,Karine Rousselet-Perraut,T. C. Teixeira,Frédéric Thévenin,Michael Thompson +25 more
TL;DR: Asteroseismology provides us with a unique opportunity to improve our understanding of stellar structure and evolution and has led to a significant increase in the size of the research community.
Journal ArticleDOI
The debris disc around τ Ceti: a massive analogue to the Kuiper Belt
TL;DR: In this article, a new 850-µm image showed that there is indeed a debris disc, extending out to ≈55 au (15 arcsec) radius, around a Sun-like star of late main-sequence age.
Journal ArticleDOI
Deriving precise parameters for cool solar-type stars. Optimizing the iron line list
Maria Tsantaki,S. G. Sousa,S. G. Sousa,V. Zh. Adibekyan,Nuno C. Santos,Annelies Mortier,Garik Israelian +6 more
TL;DR: In this article, the authors improved the description of the spectroscopic temperatures especially for the cooler stars where the differences with the Infrared Flux Method are higher, as presented in previous work.
Journal ArticleDOI
Solar-like oscillations in the G8 V star tau Ceti
Teresa C. Teixeira,H. Kjeldsen,Timothy R. Bedding,François Bouchy,J. Christensen-Dalsgaard,M. S. Cunha,T. H. Dall,S. Frandsen,Christoffer Karoff,Mário J. P. F. G. Monteiro,Frank P. Pijpers +10 more
TL;DR: In this paper, the authors used HARPS to measure oscillations in the low-mass star tau Cet. Although the data were compromised by instrumental noise, they were able to extract the main features of the oscillations.
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