Astrophysics and Space Science, 316, pp. 61-73, http://dx.doi.org./10.1007/s10509-007-9663-9
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2008 (v1)Journal articleUploaded on: December 3, 2022
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2006 (v1)Journal article
Astronomy and Astrophysics, 449, pp. 673-685, http://dx.doi.org./10.1051/0004-6361:20054181
Uploaded on: December 3, 2022 -
2004 (v1)Journal article
We report the angular diameter measurement obtained with the VINCI/VLTI instrument on the nearby star Procyon A (alpha CMi A, F5IV-V), at a relative precision of ± 0.9%. We obtain a uniform disk angular diameter in the K band of thetaUD = 5.376±0.047 mas and a limb darkened value of thetaLD = 5.448±0.053 mas. Together with the HIPPARCOS...
Uploaded on: December 3, 2022 -
2010 (v1)Journal article
Aims: The critical surface of a rapidly rotating star is determined, assuming that the rotation is either uniform or shellular (angular velocity constant on level surfaces, but increasing with depth). Methods: A step beyond the classical Roche model, where the entire mass is assumed to be gathered at the center of the star, here the...
Uploaded on: December 4, 2022 -
June 16, 2005 (v1)Journal article
Using VLTI/VINCI angular diameter measurements, we constrain the evolutionary status of three asteroseismic targets: the stars $\delta$ Eri, $\xi$ Hya, $\eta$ 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 $\delta$ Eri...
Uploaded on: December 4, 2022 -
February 1, 1998 (v1)Journal article
Helioseismic inversions, carried out for several years on various ground-based and spatial observations, have shown that the solar rotation rate presents two principal regimes: a quasi-rigid rotation in the radiative interior and a latitude-dependent rotation in the whole convection zone. The thin layer, named solar tachocline, between these...
Uploaded on: December 4, 2022 -
2006 (v1)Journal article
Models of Procyon A satisfying the actual observational constraints, particularly the asteroseismic ones, are discussed. The oscillations of these models were computed and analysed. We looked for seismic signatures of the evolutionary status of Procyon A. We show that the behavior of the small frequency spacings, particularly allows us to...
Uploaded on: December 4, 2022 -
2005 (v1)Journal article
Results on the effects of microscopic diffusion on the modeling and oscillations of solar-like stars are discussed. Comparisons between models with and without microscopic diffusion, subjected to observational constraints, namely effective temperature, luminosity, surface metallicity and mass derived from photometry, spectroscopy and...
Uploaded on: December 4, 2022 -
April 2, 1995 (v1)Conference paper
A 2-D regularized least square inversion code for solar rotation has been constructed which approximates the rotation rate by piecewise polynomials projected on B-splines. It is applied to the rotational splitting data of BBSO (Ref. 1). A discussion of the in uence of the number and order of the splinebasis on the results is given. Preliminary...
Uploaded on: December 4, 2022 -
2007 (v1)Journal article
Astronomy and Astrophysics, 469, pp. 1145-1149, http://dx.doi.org./10.1051/0004-6361:7212
Uploaded on: December 3, 2022 -
September 2010 (v1)Journal article
Context. Recently the triple-α reaction rate has been re-evaluated. In the temperature range, 107-108 K, with respect to the NACRE rate, the new rate is enhanced by up to 20 orders-magnitude. Aims: To validate this new rate, we investigate its consequences for the evolution of Cepheid models. Methods: The stellar evolutionary tracks are...
Uploaded on: December 3, 2022 -
September 22, 2013 (v1)Conference paper
Studying exoplanets with their parent stars is crucial to understand their population, formation and history. We review some of the key questions regarding their evolution with particular emphasis on giant gaseous exoplanets orbiting close to solar-type stars. For masses above that of Saturn, transiting exoplanets have large radii indicative of...
Uploaded on: March 25, 2023 -
August 1, 1997 (v1)Journal article
Observations of surface oscillations of the Sun can be analyzed to probe the solar interior. We use data obtained by the LOWL instrument (LOWL is an abbreviation for low degree with degree denoted by L) installed on Mauna Loa, Hawaii, since 1994 to investigate solar internal rotation. A 2 Dimensional Regularized Least-Squares (2D RLS) inverse...
Uploaded on: December 4, 2022 -
2008 (v1)Journal article
Astrophysics and Space Science, 316, pp. 219-229, http://dx.doi.org./10.1007/s10509-008-9803-x
Uploaded on: December 3, 2022 -
2004 (v1)Journal article
We report in this paper the direct interferometric measurement of the angular diameter of five nearby Vega-like stars: alpha PsA, beta Leo, beta Pic, ε Eri and tau 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 66...
Uploaded on: December 4, 2022