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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Stellar Lyα Emission Lines in the Hubble Space Telescope Archive: Intrinsic Line Fluxes and Absorption from the Heliosphere and Astrospheres*
Brian E. Wood,Seth Redfield,Jeffrey L. Linsky,Hans-Reinhard Müller,Hans-Reinhard Müller,Gary P. Zank +5 more
TL;DR: In this paper, the authors search the Hubble Space Telescope (HST) archive for previously unanalyzed observations of stellar H I Lyα emission lines, their primary purpose being to look for new detections of Lyα absorption from the outer heliosphere and to also search for analogous absorption of the astrospheres surrounding the observed stars.
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Accurate fundamental parameters for lower main‐sequence stars
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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
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VLTI near-IR interferometric observations of Vega-like stars: Radius and age of a PsA, b Leo, b Pic, e Eri and t Cet
E. Di Folco,F. Thévenin,Pierre Kervella,A. Domiciano de Souza,A. Domiciano de Souza,V. Coudé du Foresto,D. Segransan,Pierre Morel +7 more
TL;DR: In this article, the angular diameter of five nearby Vega-like stars, α PsA, β Leo, β Pic, � Eri and τ Cet, was estimated with a 1 to 2% accuracy.
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Dusty debris disks as signposts of planets: implications for spitzer space telescope
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References
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