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
Reads0
Chats0
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
More filters
Journal ArticleDOI
Navy precision optical interferometer measurements of 10 stellar oscillators
Ellyn K. Baines,J. Thomas Armstrong,Henrique R. Schmitt,James A. Benson,R. T. Zavala,Gerard T. van Belle +5 more
TL;DR: In this article, the angular diameters of 10 stars that have previously measured solar-like oscillations were measured using the Navy Precision Optical Interferometer (NPOI) and combined with Hipparcos parallaxes to determine the stars' physical radii.
Journal ArticleDOI
The Chemical Composition of τ Ceti and Possible Effects on Terrestrial Planets
TL;DR: In this paper, the authors reported abundances of 23 elements using spectra from the MIKE spectrograph on Magellan and calculated the position of the classical habitable zone (HZ) with time.
Journal ArticleDOI
The Chemical Composition of {\tau} Ceti and Possible Effects on Terrestrial Planets
TL;DR: In this paper, the authors report abundances of 23 elements using spectra from the MIKE spectrograph on Magellan using stellar models with the abundances determined here, calculate the position of the classical habitable zone with time.
Journal ArticleDOI
Asteroseismic modelling of the metal-poor star Tau Ceti
Yanke Tang,Ning Gai,Ning Gai +2 more
TL;DR: In this paper, a grid of stellar model candidates that fall within all the error boxes in the HR diagram have been constructed, and both the model frequencies and large and small frequency separations are calculated using the Guenther's stellar pulsation code.
Journal ArticleDOI
Precision angular diameters for 16 southern stars with VLTI/PIONIER
TL;DR: In this article, a set of precision diameters and temperatures for a sample of 6 dwarf, 5 sub-giant, and 5 giant stars observed with the PIONIER beam combiner at the VLTI were presented.
References
More filters
Journal ArticleDOI
Updated Opal Opacities
TL;DR: The updated OPAL Rosseland mean opacities for Population I stars have been presented in this paper, where the main opacity changes are increases of as much as 20% for population I stars due to the explicit inclusion of 19 metals (compared to 12 metals in the earlier calculations).
Journal ArticleDOI
Solar models with helium and heavy-element diffusion
TL;DR: In this article, the effects on neutrino fluxes of each change in the input physics are evaluated separately by constructing a series of solar models with one additional improvement added at each stage.
Journal ArticleDOI
Spectral Irradiance Calibration in the Infrared. X. A Self-Consistent Radiometric All-Sky Network of Absolutely Calibrated Stellar Spectra
TL;DR: In this article, the authors start from six absolutely calibrated continuous stellar spectra from 1.2 to 35?m for K0, K1.5, K3, K5, and M0 giants, and normalize each template by photometry for the individual stars using published and/or newly secured near and mid-infrared photometry obtained through fully characterized, absolutely calibrated, combinations of filter passband, detector radiance response, and mean terrestrial atmospheric transmission.
Book
Solar Interior and Atmosphere
TL;DR: In this article, observational data derived from the world's largest solar telescopes are correlated with theoretical discussions in nuclear and atomic physics by contributors representing a wide range of interests in solar research, focusing both on processes occurring at the interior of the Sun and on complicated features observed at its surface.