History and results of the Riga dynamo experiments

Agris Gailitis; Gunter Gerbeth; Thomas Gundrum; Olgerts Lielausis; Ernests Platacis; Frank Stefani

doi:10.1016/j.crhy.2008.07.004

Home/Archive/arXiv

arXiv · 0807.0305

History and results of the Riga dynamo experiments

Agris Gailitis·Gunter Gerbeth·Thomas Gundrum·Olgerts Lielausis·Ernests Platacis·Frank Stefani

View original source ↗Read source document ↗Export metadata ↓

Abstract

On 11 November 1999, a self-exciting magnetic eigenfield was detected for the first time in the Riga liquid sodium dynamo experiment. We report on the long history leading to this event, and on the subsequent experimental campaigns which provided a wealth of data on the kinematic and the saturated regime of this dynamo. The present state of the theoretical understanding of both regimes is delineated, and some comparisons with other laboratory dynamo experiments are made.

Explore related subjects

astro-ph physics.flu-dyn

Keep this discovery

BibTeX RIS

Agris Gailitis, Gunter Gerbeth, Thomas Gundrum, Olgerts Lielausis, Ernests Platacis, Frank Stefani. 2008-07-02. History and results of the Riga dynamo experiments. https://doi.org/10.1016/j.crhy.2008.07.004

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related papers

arXiv2016

Black Stars and Gamma Ray Bursts

Stars that are collapsing toward forming a black hole but are frozen near the Schwarzschild horizon are termed "black stars". Collisions of black stars, in contrast to black hole collisions, may be sources of gamma ray bursts, whose basic parameters are estimated quite simply and are found to be consistent with observed gamma ray bursts. Black star gamma ray bursts should be preceded by gravitational wave emission similar to that from the coalescence of black holes.

astro-ph↗

arXiv2016

Kinematic Control of the Inertiality of ICRS Catalogs

We perform a kinematic analysis of the Hipparcos and TRC proper motions of stars by using a linear Ogorodnikov-Milne model. All of the distant (r more than 0.2 kpc) stars of the Hipparcos catalog have been found to rotate around the Galactic y axis with an angular velocity of -0.36 +/- 0.09 mas/year. One of the causes of this rotation may be an uncertainty in the lunisolar precession constant adopted when constructing the ICRS. In this case? the correction to the IAU (1976) lunisolar precession constant in longitude is shown to be -3.26 +/- 0.10 mas/yr. Based on the TRC catalog, we have determined the main Oort constants: A = 14.9 +/- 1.0 and B = -10.8 +/- 0.3 km/s/kpc. The component of the model that describes the rotation of all TRC stars around the Galactic y axis is nonzero for all magnitudes, My= -0.86 +/- 0.11 mas/yr.

astro-ph↗

arXiv2016

Astrometric Control of the Inertiality of the Hipparcos Catalog

Based on the most complete list of the results of an individual comparison of the proper motions for stars of various programs common to the Hipparcos catalog, each of which is an independent realization of the inertial reference frame with regard to stellar proper motions, we redetermined the vector $ω$ of residual rotation of the ICRS system relative to the extragalactic reference frame. The equatorial components of this vector were found to be the following: $ω_x = +0.04\pm 0.15$ mas yr$^{-1}$, $ω_y = +0.18\pm 0.12$ mas yr$^{-1}$, and $ω_z = -0.35\pm 0.09$ mas yr$^{-1}$.

astro-ph↗