Aims. We report the detection of a magnetic field on Vega through spectropolarimetric observations. Methods. We acquired 257 Stokes V high signal-to-noise and high-resolution echelle spectra during four consecutive nights with NARVAL spectropolarimeter at the 2-m Telescope Bernard Lyot of Observatoire du Pic du Midi (France). A circularly polarized signal in line profiles is detected after gath...

It is shown experimentally that a relatively low longitudinal magnetic field applied causes a noticeable change in the velocity of autosoliton travel in InSb samples and a visible redistribution of these autosolitons in the electric field. As a result, the current oscillation frequency and amplitude in the external circuit of the sample either increase or decrease depending on the direction of ...

in order to study the effect of intensity and exposure duration magnetic field on wheat (triticum aestivum l.) seed germination an experiment was conducted in laboratory of ferdowsi university of mashhad, iran. the experiment was including 11 treatments as three level of magnetic field intensities (pretreatment of seeds with 50, 100 and 150 mt magnetic field) and three exposure durations (10, 2...

Aims. We report the detection of a magnetic field on Vega through spectropolarimetric observations. Methods. We acquired 257 Stokes V, high signal-to-noise and high-resolution echelle spectra during four consecutive nights with the NARVAL spectropolarimeter at the 2-m Telescope Bernard Lyot of Observatoire du Pic du Midi (France). A circularly polarized signal in line profiles is unambiguously ...

Longitudinal and transverse voltages have been measured on thin films of MgB 2 with different superconducting transition widths. The study has been performed in zero and non-zero external magnetic fields. The non-zero transverse voltage has been observed in close vicinity of the critical temperature in zero external magnetic field, while further away from T c this voltage becomes zero. In magne...

In this study, a realistic model for dynamic instability of embedded single-walled nanotubes (SWCNTs) conveying pulsating fluid is presented considering the viscoelastic property of the nanotubes using Kelvin–Voigt model. SWCNTs are placed in longitudinal magnetic fields and modeled by sinusoidal shear deformation beam theory (SSDBT) as well as modified couple stress theory. The effect of slip ...

We present new results of a survey for weak magnetic fields among DA white dwarfs with inclusion of some brighter hot subdwarf stars. We have detected variable circular polarization in the Hα line of the hot subdwarf star Feige 34 (SP: sdO). From these data, we estimate that the longitudinal magnetic field of this star varies from −1.1 ± 3.2 kG to +9.6 ± 2.6 kG, with a mean of about +5 kG and a...

Context. Details of the magnetic field in quiet-Sun chromosphere are key to our understanding essential aspects solar atmosphere. However, strength and orientation this have not been thoroughly studied at high spatial resolution. Aims. We aim determine longitudinal component ( B ∥ ) regions depending on their size. Methods. estimated by applying weak-field approximation high-spatial-resolution ...

Abstrac t This paper presents a measuring system capable of detecting longitudinal and circumferential defects using remote field eddy current in stainless steel tubes with an AMR sensor. An excitation coil is required with a time varying current to produce a magnetic field that penetrates the material on test. The experimental results from both defects are compared with other results for the s...