VLTI / VINCI diameter constraints on the evolutionary status of δ Eri , ξ Hya , η Boo

نویسندگان

  • F. Thévenin
  • P. Kervella
  • B. Pichon
  • P. Morel
  • E. Di Folco
  • Y. Lebreton
چکیده

Using VLTI/VINCI angular diameter measurements, we constrain the evolutionary status of three asteroseismic targets: the stars δ Eri, ξ Hya, η Boo. Our predictions of the mean large frequency spacing of these stars are in agreement with published observational estimations. Looking without success for a companion of δ Eri we doubt on its classification as an RS CVn star.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Interferometric observations of η Carinae with VINCI / VLTI ( Research Note )

Context. The bright star η Carinae is the most massive and luminous star in our region of the Milky Way. Though it has been extensively studied using many different techniques, its physical nature and the mechanism that led to the creation of the Homunculus nebula are still debated. Aims. We aimed at resolving the central engine of the η Carinae complex in the near-infrared on angular scales of...

متن کامل

VLTI near-IR interferometric observations of Vega-like stars

We report in this paper the direct interferometric measurement of the angular diameter of five nearby Vega-like stars: αPsA, βLeo, β Pic, Eri and τCet. 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 66 m to 140 m. The five stellar photospheres are resolved and we deriv...

متن کامل

Modeling of αCen and Procyon using VLTI observations

We present a novel approach to model the nearby stars αCen A & B and Procyon A using asteroseismic and interferometric constraints. Using the VINCI instrument installed at the VLT Interferometer (VLTI), the angular diameters of the αCentauri system were measured with a relative precision of 0.2% and 0.6%, respectively. From these values, we derive linear radii of R[A] = 1.224±0.003R⊙ and R[B] =...

متن کامل

The interferometric diameter and internal structure of Sirius A

The interferometric observations of dwarf stars in the solar neighbourhood, combined with Hipparcos parallaxes provide very precise values of their linear diameters. In this paper, we report the direct measurement of the angular diameter of the bright star Sirius A with the VINCI/VLTI instrument. We obtain a uniform disk angular diameter of θUD = 5.936± 0.016 mas in theK band and a limb darkene...

متن کامل

The diameters of α Centauri A and B A comparison of the asteroseismic and VINCI / VLTI views

We compare the first direct angular diameter measurements obtained on our closest stellar neighbour, α Centauri to recent model diameters constrained by asteroseismic observations. Using the VINCI instrument installed at ESO's VLT Interferometer (VLTI), the angular diameters of the two main components of the system, α Cen A and B were measured with a relative precision of 0.2% and 0.6% respecti...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2005