Desde el descubrimiento de los rayos cósmicos (RC) por Victor Hess en 1912, su estudio ha supuesto una forma complementaria a los aceleradores de partículas para buscar nuevas respuestas al modelo estándar de la física de partículas. Esta radiación que incide sobre la Tierra desde el espacio exterior puede revelar indicios de la aniquilación de

Very low-mass stars, brown dwarfs, and giant planets with effective temperatures < 2700 K (or spectral types cooler than M7) are usually referred to as ultra-cool dwarfs. Their low atmospheric temperatures and high pressures favor the appearance of condensates, which may draw together to form cloud-like structures in their atmospheres. According to

We report the identification of 61.45 d-1 (711.2 μHz) oscillations, with amplitudes of 62.6 μmag, in KIC 4768731 (HD 225914) using Kepler photometry. This relatively bright (V = 9.17) chemically peculiar star with spectral type A5 Vp SrCr(Eu) has previously been found to exhibit rotational modulation with a period of 5.21 d. Fourier analysis

A correct modeling of the scattering polarization profiles observed in some spectral lines of diagnostic interest, the sodium doublet being one of the most important examples, requires taking hyperfine structure (HFS) and quantum interference between different J-levels into account. An atomic model suitable for taking these physical ingredients