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  1. No Access

    Article

    Measurement of the radial velocity of the Sun as a star by means of a reflecting solar system body

    Minor bodies of the solar system can be used to measure the spectrum of the Sun as a star by observing sunlight reflected by their surfaces. To perform an accurate measurement of the radial velocity of the Sun...

    A. F. Lanza, P. Molaro in Experimental Astronomy (2015)

  2. No Access

    Chapter and Conference Paper

    Robust Limit on a Varying Proton-to-Electron Mass Ratio from a Single H2 System

    The variation of the dimensionless fundamental physical constant \(\mu = {m}_{p}/{m}_{e}\) can be checked through observation...

    M. Wendt, P. Molaro in From Varying Couplings to Fundamental Physics (2011)

  3. No Access

    Chapter and Conference Paper

    Searching for Chameleon-Like Scalar Fields

    Using the 32-m Medicina, 45-m Nobeyama, and 100-m Effelsberg telescopes we found a statistically significant velocity offset ΔV ≈ 27 ± 3 m s − 1 (1σ) between the inversion transition in NH3(1,1) and low-J rotatio...

    S. A. Levshakov, P. Molaro, M. G. Kozlov… in From Varying Couplings to Fundamental Phys… (2011)

  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

    ESPRESSO: A High Resolution Spectrograph for the Combined Coudé Focus of the VLT

    In the frame of the call for proposal for the E-ELT instrumentation studies, the CODEX team carried out the feasibility study for a spectrograph for extremely stable Doppler measurements. The CODEX project and...

    Luca Pasquini, A. Manescau, G. Avila, B. Delabre… in Science with the VLT in the ELT Era (2009)

  6. No Access

    Chapter and Conference Paper

    From ESPRESSO to CODEX

    CODEX and ESPRESSO are concepts for ultra-stable, high-resolution spectrographs at the E-ELT and VLT, respectively. Both instruments are well motivated by distinct sets of science drivers. However, ESPRESSO wi...

    J. Liske, L. Pasquini, P. Bonifacio, F. Bouchy… in Science with the VLT in the ELT Era (2009)

  7. No Access

    Chapter and Conference Paper

    Codex

    Many talks in this conference have shown the power of high resolution spectroscopy, coupled to high precision. A new spectrograph, fed by an Extremely Large Telescope, will have such a huge collecting power th...

    Luca Pasquini, G. Avila, B. Délabre, H. Dekker… in Precision Spectroscopy in Astrophysics (2008)

  8. No Access

    Chapter and Conference Paper

    Oxygen Abundances in Very Metal-Poor Stars

    Oxygen abundances have been derived in a sample of very metal-poor stars from observations of the O i triplet at λλ7771–7775Å and OH lines in the near ultraviolet. A detailed NLTE analysis of iron lines has been ...

    R. J. García López, G. Israelian, R. Rebolo… in Highlights of Spanish Astrophysics II (2001)

  9. No Access

    Article

    Spectroscopy of Giants of the Sagittarius Dwarf Galaxy

    In this paper we present the first results of the analysis of intermediate resolution (Δλ ∼ 3.5 Å) spectra of giants of the Sagittarius dwarf galaxy acquired using the ESO NTT telescope. From the deep CCD phot...

    P. Bonifacio, L. Pasquini, P. Molaro, G. Marconi in Astrophysics and Space Science (1999)

  10. No Access

    Chapter and Conference Paper

    Spectroscopy of Giants of the Sagittarius DWARF Galaxy

    In this paper we present the first results of the analysis of intermediate resolution (Δλ ~ 3.5 Å) spectra of giants of the Sagittarius dwarf galaxy acquired using the ESO NTT telescope. From the deep CCD phot...

    P. Bonifacio, L. Pasquini, P. Molaro… in Galaxy Evolution: Connecting the Distant U… (1999)

  11. No Access

    Article

    On the Nature of Damped LYα Systems: Clues from Determinations of Elemental Abundance Ratios

    We present a study of the [α/Fe-peak] and [N/α] abundance ratios in Damped Lyα (DLA) systems. By using ratios of undepleted elements ([S/Zn] and [N/S]) or when abundances of refractory elements are corrected b...

    M. Centurión, P. Bonifacio, P. Molaro, G. Vladilo in Astrophysics and Space Science (1998)

  12. No Access

    Chapter and Conference Paper

    The Low Metallicity Tail of the Halo Metallicity Distribution Function

    Ongoing spectroscopy and photometry of stars selected in the HK objective-prism/interference-filter survey of Beers and colleagues has resulted in the identification of many hundreds of additional stars in the...

    T. C. Beers, S. Rossi, J. E. Norris… in Primordial Nuclei and Their Galactic Evolu… (1998)

  13. No Access

    Chapter and Conference Paper

    Neutral Nitrogen in Damped Lyman a Systems

    Nitrogen abundance determinations in high-redshift galaxies are an important tool for understanding the first stages of galactic chemical evolution. The most intense NI lines, i.e. the triplets at rest wavelen...

    G. Vladilo, P. Molaro, F. Matteucci, M. Centurión in The Early Universe with the VLT (1997)

  14. No Access

    Chapter and Conference Paper

    Beryllium Abundances in a New Set of Halo Stars

    We present observations of the Be II 3130 Å resonance doublet in 15 halo stars with metallicities ranging from [Fe/H]=−0.4 to −3.2 obtained with the CASPEC spectrograph with a FWHM≈0.09 Å resolution at the ESO...

    P. Molaro, P. Bonifacio, F. Castelli, L. Pasquini… in The Light Element Abundances (1995)

  15. No Access

    Chapter and Conference Paper

    As Metal Poor as It Could Be: the Damped System at z=3.390 Towards QSO 0000-2619

    We present an abundance analysis of the damped Lya system seen in the spectrum of the QSO 0000-2619 at z abs=3.390. From the analysis of high resolution spectra (FWHM ⋍ 11 and 14 km s−1) w...

    G Vladilo, S. D’Odorico, P. Molaro, S. Savaglio in QSO Absorption Lines (1995)

  16. No Access

    Chapter and Conference Paper

    New Results on the Gunn-Peterson Effect at High Redshift

    Attempts to measure the optical depth due to a diffuse intergalactic medium (IGM) in the spectra of high redshift quasars (GP test) within the ESO key program on the intergalactic medium are reviewed. It is sh...

    E. Giallongo, S. D’Odorico, A. Fontana, S. Savaglio, S. Cristiani… in QSO Absorption Lines (1995)

  17. No Access

    Article

    The local interstellar medium: A test-bed for the galactic ISM

    We outline a method to explore the column density of the Local Interstellar Medium (LISM) using absorptions in the resonance H and K lines of Mgii. The intrinsic strengths of these lines in the temperature and de...

    R. Génova, J. E. Beckman, G. Vladilo, P. Molaro in Astrophysics and Space Science (1989)

  18. No Access

    Article

    Some considerations on the non-detection of interstellar Li and B towards the SN1987a

    A very low upper limit of 0.15 mÅ for the interstellar λ6707 Å Lii line has been recently derived towards the SN1987a by Baade and Magain (1988). This value corresponds toN(Li)<1.4×1011 cm−2 and gives [Li/H]<5.4×...

    P. Molaro, G. Vladilo in Astrophysics and Space Science (1989)

  19. No Access

    Chapter and Conference Paper

    The NaI interstellar spectrum of HVC 287.5+225+240

    P. Molaro in Structure and Dynamics of the Interstellar medium (1989)

  20. No Access

    Chapter and Conference Paper

    High-velocity absorption components toward the LMC

    High-resolution (λ/δλ ≅ 6 × 104) spectra of R136 (the central object of 30 Dor) and of 2 LMC supergiants obtained at ESO with the 1.4-m telescope have been analysed in order to study the high-velocity absorption ...

    G. Vladilo, P. Molaro, S. Monai… in Structure and Dynamics of the Interstellar… (1989)