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CIV Absorbers in z>4 Quasars: Tracing Early Galactic Halos Evolution
Celine Peroux, Patrick Petitjean, Bastien Aracil +2
We use 29 z>4 quasar spectra to build a homogeneous sample of high-redshift CIV absorbers. We use these data to calculate the number density, n(z), of W_rest(CIV)>0.30 A CIV double…
Spectropolarimetry of Compton-thin Seyfert 2s
S. L. Lumsden, D. M. Alexander, J. H. Hough
We present new spectropolarimetry of a sample of nearby Compton-thin Seyfert 2 galaxies (ie those with N_H<10^23 cm^-2). We show that the detection rate of scattered broad Halpha i…
Structural, magnetic and transport properties of thin films of the Heusler alloy Co2MnSi
L. J. Singh, Z. H. Barber, Y. Miyoshi +3
Thin films of Co2MnSi have been grown on a-plane sapphire substrates from three elemental targets by dc magnetron co-sputtering. These films are single phase, have a strong (110) t…
Direct Observation of a Temperature Dependent 0-pi Junction Transition in a Mesoscopic High Critical Temperature Grain Boundary Junction
G. Testa, A. Monaco, E. Esposito +5
We have observed, for the first time, a temperature dependent 0-pi junction crossover in a 45 symmetric [001] tilt grain boundary junction. Experimental data, obtained by a double…
Properties of QSO Metal Line Absorption Systems at High Redshifts: Nature and Evolution of the Absorbers and the Ionizing Radiation Background
Alec Boksenberg, Wallace L. W. Sargent, Michael Rauch
In Keck HIRES spectra of 9 QSOs we identify a sample of 908 CIV absorber components in 188 systems outside the Lyman forest in the redshift range 1.6 < z < 4.4, with related lines…
The Local Group Census: planetary nebulae in IC 10, Leo A and Sextans A
L. Magrini, R. L. M. Corradi, R. Greimel +8
In the framework of our narrow-band survey of the Local Group galaxies, we present the results of the search for planetary nebulae (PNe) in the dwarf irregular galaxies IC10, LeoA…