Gérard Jasniewicz

Learn More
Simbad is the reference database for identification and bibliography of astronomical objects. It contains identifications, “basic data”, bibliography, and selected observational measurements for several million astronomical objects. Simbad is developed and maintained by CDS, Strasbourg. Building the database contents is achieved with the help of several(More)
A spectroscopic analysis of the G-star located at the centre of Abell 35 leads to a surface gravity log g= 3.7±0.5 and an effective temperature T eff = 5300 ± 200 K, which are typical of a G8IV spectral type. We estimate a projected rota-tional velocity of 55 ± 10 km s −1 and deduce a radius 1.5 ≤ R G ≤ 3.5R in agreement with the subgiant luminosity class:(More)
The Centre de Données astronomiques de Strasbourg (CDS) provides homogeneous access to heterogeneous information of various origins: information about astronomical objects in Simbad; catalogs and observation logs in VizieR and in the catalogue service; reference images and overlays in Aladin; nomenclature in the Dictionary of Nomenclature; Yellow Page(More)
VLT-UVES high resolution spectra of seven turnoff stars in the metal-poor globular cluster NGC 6397 have been obtained. Atmospheric parameters and abundances of several elements and Ba) were derived. The mean iron abundance is [Fe/H] =-2.02, with no star-to-star variation. The mean abundances of the alpha-elements (Ca, Ti) and of the iron-peak elements (Sc,(More)
Gaia is a cornerstone mission in the science programme of the European Space Agency (ESA). The spacecraft construction was approved in 2006, following a study in which the original interferometric concept was changed to a direct-imaging approach. Both the spacecraft and the payload were built by European industry. The involvement of the scientific community(More)
de la Reza et al. (1997) suggested that all K giants become Li-rich for a short time. During this period the giants are associated with an expanding thin circumstellar shell supposedly triggered by an abrupt internal mixing mechanism resulting in the surface Li enrichment. In order to test this hypothesis twenty nine late-type giants with far-infrared(More)
The Centre de Données astronomiques de Strasbourg (CDS) develops a set of value-added services, widely used for information retrieval, observation preparation, data interpretation, ... SIMBAD, VizieR, Aladin, and the ‘Dictionary of Nomenclature’, integrate heterogeneous, selected information from observatory archives, sky surveys and publications. Each(More)
The Centre de Données astronomiques de Strasbourg (CDS) provides homogeneous access to heterogeneous information of various origins: information about astronomical objects in SIMBAD; catalogs and observation logs in VIZIER and in the catalogue service; reference images and overlays in ALADIN; nomenclature in the Dictionary of Nomenclature; Yellow Page(More)