Line asymmetries and shifts are powerful tools for studying velocity fields in the stellar photospheres. Other effects, however, could also generate asymmetries...
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PublicationThe Limited Influence of Pressure Gradients on Late-Type Stellar Line Asymmetries
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PublicationThe Line Emission Region in III Zw 2: Kinematics and Variability
We have studied the Lyα, Hβ, Hα, and Mg II λ2798 line profiles of the Seyfert 1 galaxy III Zw 2. The shapes of these broad emission lines show evidence of a...
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PublicationThe Line-of-Sight Velocity Distributions of Intracluster Planetary Nebulae in the Virgo Cluster Core
Radial velocities of 40 intracluster planetary nebulae (ICPNs) in the Virgo Cluster were obtained with the new multifiber FLAMES spectrograph on UT2 at the Very...
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PublicationThe link between the star formation history and [α/Fe ]
The abundance ratios between key elements such as iron and α-process elements carry a wealth of information on the star formation history (SFH) of galaxies. So...
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PublicationThe lithium abundance in the extremely metal-deficient dwarf G 64-12
The authors have measured the 7Li abundance in G 64-12 an extremely metal-deficient dwarf [Fe/H] = -3.5 (Carney and Peterson, 1981) with effective temperature...
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PublicationThe Lithium Depletion Boundary and the Age of the Hyades Cluster
Determination of the lithium depletion boundary (LDB), i.e., the observational limit below which the cores of very low-mass objects do not reach high enough...
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PublicationThe lithium resonance line in T Tauri stars
High-resolution spectra provide evidence of the Li-I 6707 line in 28 of the stars, and the significance of the results is discussed. The Li-I equivalent widths...
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PublicationThe Lithium Test in Young Brown Dwarf Candidates
We present high-, mid-, and low-resolution spectroscopy of the field brown dwarf candidate PC 0025+0447 (M9.5) spanning a 4 yr baseline (1994-1998). The...
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PublicationThe little-studied cluster Berkeley 90. I. LS III +46 11: a very massive O3.5 If* + O3.5 If* binary
Context. It appears that most (if not all) massive stars are born in multiple systems. At the same time, the most massive binaries are hard to find owing to...