Pc3 pulsations during variable IMF conditions

Pc3 pulsations during variable IMF conditions

Pc3 geomagnetic ®eld ̄uctuations detected at low latitude (L'Aquila, Italy) during the passage of a high velocity solar wind stream, characterized by variable interplanetary magnetic ®eld conditions, are analyzed. Higher frequency resonant ̄uctuations and lower frequency phenomena are simultaneously observed; the intermittent appearance and the variable frequency of the longer period modes can ...

Chemodynamical simulations with variable IMF

Using self-consistent chemodynamical simulations including star formation, supernova feedback, and chemical enrichment, I show the dependence of cosmic star formation and chemical enrichment histories on the initial mass function (IMF). The effects of Pop-III IMF can be only seen in the elemental abundance ratios at z > ∼ 4 or [Fe/H] < ∼ −2. The preferable IMF has a flatter slope in the case of...

Spectral structure of Pc3–4 pulsations: possible signatures of cavity modes

In this study we investigate the spectral structure of Pc3–4 pulsations observed at low and midlatitudes. For this purpose, ground-based magnetometer data recorded at the MM100 stations in Europe and at two low latitude stations in South Africa were used. In addition, fluxgate magnetometer data from the CHAMP (CHAllenging Minisatellite Payload) low Earth orbit satellite were used. The results o...

Chaoti pulsations in variable stars with harmoni mode oupling

Discharge Gas Pulsations in a Variable Speed Compressor