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  1. No Access

    Article

    The temperature and chronology of heavy-element synthesis in low-mass stars

    Spectrographically obtained zirconium, niobium and technetium abundances in a sample of low-mass stars of type S are used to determine that, in these stars, heavy elements are synthesized by the slow-neutron-c...

    P. Neyskens, S. Van Eck, A. Jorissen, S. Goriely, L. Siess, B. Plez in Nature (2015)

  2. No Access

    Article

    The PLATO 2.0 mission

    PLATO 2.0 has recently been selected for ESA’s M3 launch opportunity (2022/24). Providing accurate key planet parameters (radius, mass, density and age) in statistical numbers, it addresses fundamental questio...

    H. Rauer, C. Catala, C. Aerts, T. Appourchaux, W. Benz… in Experimental Astronomy (2014)

  3. No Access

    Article

    Imaging the heart of astrophysical objects with optical long-baseline interferometry

    The number of publications of aperture-synthesis images based on optical long-baseline interferometry measurements has recently increased due to easier access to visible and infrared interferometers. The inter...

    J.-P. Berger, F. Malbet, F. Baron, A. Chiavassa… in The Astronomy and Astrophysics Review (2012)

  4. No Access

    Chapter and Conference Paper

    The ESO Large Programme “First Stars”

    In ESO period 65 (April–September 2000) the large programme 165.N-0276, led by Roger Cayrel, began making use of UVES at the Kueyen VLT telescope. Known within the Team and outside as “First Stars”, it was aim...

    P. Bonifacio, J. Andersen, S. M. Andrievsky… in Science with the VLT in the ELT Era (2009)

  5. No Access

    Chapter and Conference Paper

    Chemical Analysis of Extragalactic Carbon Stars

    We have performed the chemical analysis of extragalactic carbon stars from VLT/UVES spectra. The derived individual abundances of metals and s-elements as well as the well known distance of the selected stars ...

    P. de Laverny, C. Abia, I. Domínguez… in Chemical Abundances and Mixing in Stars in… (2006)

  6. No Access

    Chapter and Conference Paper

    Evidence of Mixing in Extremely Metal-Poor Giants

    Thirty five extremely metal-poor (EMP) giants (22 of them with a metallicity [Fe/H] ≤ -3.0) have been observed with UVES at the VLT. In these stars the abundance of lithium carbon and nitrogen and also the 12C/13

    M. Spite, R. Cayrel, F. Spite, V. Hill… in Chemical Abundances and Mixing in Stars in… (2006)

  7. No Access

    Chapter and Conference Paper

    Sulphur in the Early Ages of the Galaxy

    We present here the results of the measurement of the sulphur abundance in very metal-poor stars. Our sample covers the [-4;-2] range of metallicity, and thus allows us to constraint the chemical evolution mod...

    E. Depagne, V. Hill, M. Spite, P. François… in Chemical Abundances and Mixing in Stars in… (2006)

  8. No Access

    Chapter and Conference Paper

    Abundance of Heavy Elements in Extremely Metal-Poor Stars

    In the framework of the VLT Large program “First Stars” (165.N-0276(A)), we have measured the abundance of 13 heavy elements using high quality UVES spectra. In this paper, we report on the abundance of Sr and...

    P. François1, R. Cayrel, E. Depagne… in Chemical Abundances and Mixing in Stars in… (2006)

  9. No Access

    Article

    Discovery of three lead-rich stars

    About half of the stable nuclei heavier than iron are believed to be synthesized during the late stages of evolution of stars with masses in the range 0.8–8 solar masses. These elements are then expelled into ...

    S. Van Eck, S. Goriely, A. Jorissen, B. Plez in Nature (2001)

  10. No Access

    Article

    Measurement of stellar age from uranium decay

    The ages of the oldest stars in the Galaxy indicate when star formation began, and provide a minimum age for the Universe. Radioactive dating of meteoritic material1 and stars2 relies on comparing the present abu...

    R. Cayrel, V. Hill, T. C. Beers, B. Barbuy, M. Spite, F. Spite, B. Plez… in Nature (2001)

  11. No Access

    Chapter

    Tomography of the Atmosphere of Long-Period Variable Stars

    This paper presents a new tomographic technique to derive the velocity feld across the atmosphere of long-period variable (LPV) stars. The method crosscorrelates the optical spectrum with numerical masks const...

    A. Jorissen, R. Alvarez, B. Plez, D. Gillet, A. Fokin in Astrotomography (2001)

  12. No Access

    Article

    Book reviews

    W. Hermsen, W. Stamm, H. Nieuwenhuijzen, B. Plez, L. Koch-Miramond… in Space Science Reviews (1994)