SIMBAD references

2004A&A...426..601D - Astronomy and Astrophysics, volume 426, 601-617 (2004/11-1)

VLTI near-IR interferometric observations of Vega-like stars. Radius and age of α PsA, β Leo, β Pic, ε Eri and τ Cet.

DI FOLCO E., THEVENIN F., KERVELLA P., DOMICIANO DE SOUZA A., COUDE DU FORESTO V., SEGRANSAN D. and MOREL P.

Abstract (from CDS):

We report in this paper the direct interferometric measurement of the angular diameter of five nearby Vega-like stars: α PsA, β Leo, β Pic, ε Eri and τ Cet. The near-infrared (K and H bands) observations were conducted at the VLTI during the commissioning period with the VINCI instrument and three different baselines ranging from 66m to 140m. The five stellar photospheres are resolved and we derive their angular diameters with a 1 to 2% accuracy, except for βPic (14%). We discuss the detectability and the influence of a possible small amount of warm circumstellar dust on our measurements. In addition, we have used the stellar evolution code CESAM (Morel, 1997A&AS..124..597M) to compare the computed fundamental parameters to the observed values (linear diameter, luminosity, temperature and chemical abundance). As a result of the simulation, the age of the stars is inferred and found to be in good agreement with previous estimates from various other methods.

Abstract Copyright:

Journal keyword(s): techniques: interferometric - infrared: stars - stars: fundamental parameters - stars: circumstellar matter - stars: general

Simbad objects: 22

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2019.10.21-00:44:07

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