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14 papers · 2 filters
Observations of the pulsating subdwarf B star Feige 48: Constraints on evolution and companions
M. D. Reed, S. D. Kawaler
Since pulsating subdwarf B (sdBV or EC14026) stars were first discovered (Kilkenny et al, 1997), observational efforts have tried to realize their potential for constraining the in…
Near-IR [Fe II] emission diagnostics applied to cold disk winds in young stars
N. Pesenti, C. Dougados, S. Cabrit +3
We investigate the emissivity properties of the main near-IR transitions of the Fe+ ion in the conditions prevailing in the inner regions of jets from young stars, based on a simpl…
Extending the Butcher--Oemler effect up to z~0.7
S. Andreon, C. Lobo, A. Iovino
We have observed three clusters at z~0.7, of richness comparable to the low redshift sample of Butcher & Oemler (BO), and determined their fraction of blue galaxies. When adopting…
The weak-line T Tauri star V410Tau I. A multi-wavelength study of variability
B. Stelzer, M. Fernandez, V. M. Costa +10
We present the results of an intensive coordinated monitoring campaign in the optical and X-ray wavelength ranges of the low-mass, pre-main sequence star V410Tau carried out with t…
Measuring in the Early Universe: CMB Polarization, Reionization and the Fisher Matrix Analysis
G. Rocha, R. Trotta, C. J. A. P. Martins +4
We present a detailed analysis of present and future Cosmic Microwave Background constraints of the value of the fine-structure constant, . We carry out a more detailed analysis…
New constraints on varying
G. Rocha, R. Trotta, C. J. A. P. Martins +3
We present a summary of recent constraints on the value of the fine-structure constant at the epoch of decoupling from the recent observations made by the Wilkinson Microwave Aniso…