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
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Integrated optics for astronomical interferometry - VI. Coupling the light of the VLTI in K band
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TL;DR: In this paper, the authors used the commissioning data obtained with the dedicated K-band integrated optics two-telescope beam combiner which now replaces the fiber coupler MONA in the VLTI/VINCI instrument to prove that integrated optics is not only a good concept for astronomical interferometry but also a working technique with high performance.
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A Comparison of the Outer Atmosphere of the ``Flat Activity'' Star τ Ceti (G8 V) with the Sun (G2 V) and α Centauri A (G2 V)
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The radius and mass of the subgiant star β Hyi from interferometry and asteroseismology
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TL;DR: In this article, the authors used the Sydney University Stellar Interferometer (SUSI) to measure the angular diameter of β Hydri, a nearby G2 subgiant the mean density of which was recently measured with high precision using asteroseismology.
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First observations with an H-band integrated optics beam combiner at the VLTI
J. B. LeBouquin,Karine Rousselet-Perraut,P. Kern,Fabien Malbet,P. Haguenauer,Pierre Kervella,I. Schanen,Jean-Philippe Berger,A. Delboulbé,B. Arezki,Markus Schöller +10 more
TL;DR: In this article, the authors reported results obtained with the Very Large Telescope Interferometer Commissioning Instrument (VLTI-VINCI) where the fiber interferometric coupler MONA was temporarily replaced by an integrated optics beam com- biner (IONIC).
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