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17 papers · 1 filter
Evidence of magnetic accretion in an SW Sex star: discovery of variable circular polarization in LS Pegasi
P. Rodriguez-Gil, J. Casares, I. G. Martinez-Pais +2
We report on the discovery of variable circular polarization in the SW Sex star LS Pegasi. The observed modulation has an amplitude of ~0.3 % and a period of 29.6 minutes, which we…
Comment on "Foundations of quantum mechanics: Connection with stochastic processes"
D. Alonso, J. G. Muga, R. Sala Mayato
Recently, Olavo has proposed several derivations of the Schrodinger equation from different sets of hypothesis ("axiomatizations") [Phys. Rev. A 61, 052109 (2000)]. One of them is…
Semiclassical dressed states of two-level quantum systems driven by nonresonant and/or strong laser fields
A. Santana, J. M. Gomez Llorente, V. Delgado
Analytical expressions for the semiclassical dressed states and corresponding quasienergies are obtained for a two-level quantum system driven by a nonresonant and/or strong laser…
Tidal streams in the Galactic halo: Evidence for the Sagittarius northern stream or traces of a new nearby dwarf galaxy
David Martinez-Delgado, Antonio Aparicio, Maria Angeles Gomez Flechoso +1
Standard cosmology predicts that dwarfs were the first galaxies to be formed in the Universe and that many of them merge afterwards to form bigger galaxies such as the Milky Way. T…
Differential O and Si Abundances in M33 Early B Supergiants
M. I. Monteverde, A. Herrero, D. J. Lennon
We present non-LTE analyses of four M33 early B-supergiant stars and five Galactic counterparts. This is the first time that B supergiants beyond the Magellanic Clouds are analyzed…
Chemical abundances and winds of massive stars in M31: a B-type supergiant and a WC star in OB10
S. J. Smartt, P. A. Crowther, P. L. Dufton +5
We present high quality spectroscopic data for two massive stars in the OB10 association of M31, OB10-64 (B0Ia) and OB10-WR1 (WC6). Medium resolution spectra of both stars were obt…