1,515 datasets found

Keywords: Chemical abundances

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  • Optically visible open clusters and Candidates

    We have compiled a new catalogue of open clusters in the Galaxy which updates the previous catalogues of Lynga (1987, Cat. VII/92) and of Mermilliod (1995, in Information and...
  • (MgAl2O4)n and (CaAl2O4)n, n=1-7 clusters data

    Spinel (MgAl_2_O_4_) and krotite (CaAl_2_O_4_) are alternative candidates to alumina (Al_2_O_3_) as primary dust condensates in the atmospheres of oxygen-rich evolved stars....
  • Close-in planets around fast-rotating stars

    In 2013 a dearth of close-in planets around fast-rotating host stars was found using statistical tests on Kepler data. The addition of more Kepler and Transiting Exoplanet...
  • Spectroscopy of 299 galaxies from NewHa survey

    Using a sample of 299 H{alpha}-selected galaxies at z~~0.8, we study the relationship between galaxy stellar mass, gas-phase metallicity, and star formation rate (SFR), and...
  • Abundances of {rho} Pup

    We investigated the chemical composition of {rho} Pup using high-resolution spectral observations taken from the Very Large Telescope and the IUE archives and also spectra...
  • Spectroscopy of 25 stars in M68

    In this paper, we present a detailed high-resolution spectroscopic study of post main sequence stars in the globular cluster (GC) M68. Our sample, which covers a range of 4000K...
  • Photospheric parameters of CARMENES stars

    The new CARMENES instrument comprises two high-resolution and high-stability spectrographs that are used to search for habitable planets around M dwarfs in the visible and...
  • Red giant Aluminium abundances in NGC 2808

    We observed a sample of 90 red giant branch (RGB) stars in NGC 2808 using FLAMES/GIRAFFE and the high resolution grating with the set up HR21. These stars have previous accurate...
  • Equivalent widths of 13 red giants in IC 4756

    Homogeneous investigations of red giant stars in open clusters contribute to studies of internal evolutionary mixing processes inside stars, which are reflected in abundances of...
  • Lithium abundances in 714 F and G dwarf stars

    We perform a detailed analysis of Li in 714 nearby dwarf stars. Li abundances were determined through spectral line synthesis of the Li feature at 670.8 nm. The stellar sample...
  • Barred & unbarred galaxies N, O abundance ratio

    Bar-induced gas inflows towards galaxy centres are recognised as a key agent for the secular evolution of galaxies. One immediate consequence of this inflow is the accumulation...
  • Abundance analysis of HD 140283

    HD 140283 is a reference subgiant that is metal poor and confirmed to be a very old star. The abundances of this type of old star can constrain the nature and nucleosynthesis...
  • C and O isotopic ratios in Arcturus and Aldebaran

    We re-analyzed the carbon and oxygen isotopic ratios in the atmospheres of the two bright K giants Arcturus ({alpha} Boo) and Aldebaran ({alpha} Tau). These stars are in the...
  • Average spectrum of HD 140283 (370-1040nm)

    HD 140283 is a nearby (V=7.7) subgiant metal-poor star, extensively analysed in the literature. Although many spectra have been obtained for this star, none showed a...
  • VLT-FLAMES survey of massive stars

    We have previously analysed the spectra of 135 early B-type stars in the Large Magellanic Cloud (LMC) and found several groups of stars that have chemical compositions that...
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