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
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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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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
TL;DR: In this article, the authors derived an empirical effective temperature and bolometric luminosity calibration for G and K dwarfs, by applying their own implementation of the Infrared Flux Method to multiband photometry.
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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
TL;DR: In this paper, the authors compare the differences in temperature between the standard spectroscopic technique based on iron lines and the infrared flux method (IRFM) and show that the differences for the cooler stars are significantly smaller and more homogeneously distributed than in previous studies.
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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
Barry Zuckerman,Inseok Song +1 more
TL;DR: In this paper, the semimajor axes of the associated planets can be estimated from the dust temperature of the disks and rings of a distant star using the 160 μm filter.
References
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Angular diameter measurements of stars
David Mozurkewich,K. J. Johnston,Richard S. Simon,P. F. Bowers,Ralph A. Gaume,Donald J. Hutter,M. Mark Colavita,M. Shao,Xiaopei Pan +8 more
TL;DR: In this article, the Mark III optical interferometer was used to determine the angular diameters of 12 stars at wavelengths of 450 and 800 nm, and the results showed good agreement between these measurements and previously published data.
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On-line determination of stellar atmospheric parameters Teff, log g, [Fe/H] from ELODIE echelle spectra. II - The library of F5 to K7 stars
TL;DR: In this paper, a library of 211 echelle spectra taken with ELODIE at the Observatoire de Haute-Provence is presented, covering the full range of gravities and metallicities in the effective temperature interval [4000 K, 6300 K].
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On-line determination of stellar atmospheric parameters $T_{\mathrm{eff}}$, $\log g$, [Fe/H] from ELODIE echelle spectra - II. The library of F5 to K7 stars
TL;DR: In this paper, a library of 211 echelle spectra taken with ELODIE at the Observatoire de Haute-Provence is presented, covering the full range of gravities and metallicities in the effective temperature interval [4000 K, 6300 K].
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Stellar angular diameters of late-type giants and supergiants measured with the navy prototype optical interferometer
Tyler E. Nordgren,M. E. Germain,J. A. Benson,David Mozurkewich,Jeffrey J. Sudol,N. M. Elias,Arsen R. Hajian,N. M. White,D. J. Hutter,K. J. Johnston,F. S. Gauss,J. T. Armstrong,Thomas A. Pauls,Lee J. Rickard +13 more
TL;DR: In this paper, the angular diameters of 50 F, G, K, and M giant and supergiant stars using the Navy Prototype Optical Interferometer at wavelengths between 649 and 850 nm and using three baselines with lengths up to 37.5 m.