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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

    Article

    Bounds on the fine structure constantvariability from Fe ii absorption lines in QSO spectra

    The Single Ion Differential α Measurement (SIDAM)method for measuring Δα/α and its figures of merit are illustrated together withthe results produced by means of Fe ii absorption linesof QSO intervening systems. ...

    P. Molaro, D. Reimers, I. I. Agafonova… in The European Physical Journal Special Topi… (2008)

  3. 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)

  4. 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)

  5. 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)

  6. No Access

    Article

    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, S.G. Ryan, P. Molaro, R. Rebolo in Space Science Reviews (1998)

  7. 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)

  8. 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)