Recent observational and theoretical investigations of the sun and sunlike stars and of galactic structure and evolution are discussed in reviews and reports...
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PublicaciónNew windows to the universe; Proceedings of the Eleventh European Regional Astronomy Meeting, Universidad de la Laguna, Spain, July 3-8, 1989. Part II
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PublicaciónObservation of fine structure in the cold phase of the local interstellar medium using K I absorption
The K I 7699-A resonance absorption line was used to observe a group of 18 early-type stars within a 200-pc radius of the sun with a signal-to-noise ratio of 50...
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PublicaciónOn the O/Fe versus Fe/H relationship and the progenitors of type I supernovae
The new observational O/Fe versus Fe/H abundance relationship for halo stars is studied in terms of several models of chemical evolution for the solar...
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PublicaciónPlanck early results. XIX. All-sky temperature and dust optical depth from Planck and IRAS. Constraints on the "dark gas" in our Galaxy
An all sky map of the apparent temperature and optical depth of thermal dust emission is constructed using the Planck-HFI (350μm to 2 mm) andIRAS(100μm) data...
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PublicaciónProduction of Lithium in the Galactic Disk
The abundance of Li in stars formed within the past 5 Gyr is logN(Li)=3.2(+/-0.2), while the corresponding value for the oldest stars in the Galaxy is logN(Li)...
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PublicaciónRadial velocities of nearby RR Lyrae stars.
A survey of chemical abundances and radial velocities for a spatially selected sample of RR Lyrae stars has been started. Assuming an absolute magnitude of -0.6...
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PublicaciónRedetermination of the interstellar C-12/C-13 ratio in the solar vicinity
An analysis of 50 optical spectra of the interstellar methylidyne ion in the direction of HD26676 and HD149038 derived very similar interstellar isotopic ratios...
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PublicaciónSearching for solar siblings among the HARPS data
The search for solar siblings has been particularly fruitful in the past few years. At present, there are four plausible candidates reported in the literature...
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PublicaciónSpectroscopic parameters for 451 stars in the HARPS GTO planet search program. Stellar [Fe/H] and the frequency of exo-Neptunes
To understand the formation and evolution of solar-type stars in the solar neighborhood, we need to measure their stellar parameters to high accuracy. We...